Staff

Activities

Publications

Projects

Posters

EC-Project EARLINET-ACTRIS, Qick-Looks

Lidar Papers

    

    

	Name:	Phone: (+359 2) 979 XXXX	E-mail: ....@ie.bas.bg
HEAD:	Prof. D. Stoyanov, Dr.Sc.	5926, 5867	dvstoyan
RESEARCH SCIENTISTS:	Assoc. Prof. L. Gurdev, Ph.D.	5906	lugurdev
	Assoc. Prof. T. Dreischuh, Ph.D.	5867	tanjad
	Assoc. Prof. Vl. Mitev, Ph.D.	5906	mitev
	Assoc. Prof. V. Pencheva, Ph.D.	5906	spenchev
	S. Penchev, Ph.D.	5906	spenchev
	I. Grigorov	5903	ivangr
	Z. Peshev, Ph.D.	5903	zypeshev
	N. Kolev, Ph.D.	5879	blteam
	A. Deleva, Ph.D.	5903	adeleva
	El. Toncheva	5864
	Ts. Evgenieva	5879	blteam
SECONDARY SPECIALISTS:	A.Y. Perduchova	5903

    

    

    

RESEARCH ACTIVITIES

    

1. Lidar monitoring of the atmosphere

During 2010, the work of the lidar group with Cu-Br-vapor laser consisted mainly in the submission of analyzed results of experiments for the common Database of the EARLINET-ASOS project (European Aerosol Research Lidar Network - Advanced Sustainable Observation System) Contract Number 025991.

In accordance with EARLINET Network Activity 3 - Quality Assurance, in the beginning of October (09.10 - 15.10.2010) a quality test of the lidar measurements was performed. It consisted in a comparison of the results of simultaneous measurements of our lidar system and a previously calibrated mobile lidar from Meteorologischen Institut Munchen, Germany. Object of the comparison were the so called S-functions of the measurements of the two lidars. The averaged difference between the S-function values of the night-time measurements was in the order of 5 %. The averaged difference between the profiles of day-time measurements increased from 20 % to 40 % with the altitude from 2 km to 6 km above ground. This was due to an ambiguity in the data pre-processing algorithm of the lidar signal applied when day-time noise rejection was performed. The resolution of this problem will be subject of future investigations. During 2010, we continued to deliver lidar measurements data to the common Database of the EARLINET-ASOS project, as follows:

1. Regular climatological measurements - 47 measurements realized (33%), 14 of them uploaded on the EARLINET Database (26 data files for the atmospheric backscatter coefficient).
2. Measurements within the CALIPSO-project - 12 measurements realized, all of them uploaded on the Database (30 data files).
3. Lidar measurements when special events in the atmosphere were observed:
   • Transport of Saharan dust over the Mediterranean See to Europe - 9 measurements realized, all of them uploaded on the Database (15 files with the atmospheric backscatter coefficient height distribution).
   • Transport of volcanic dust over Europe during the eruption of the Eyjafjallajokull Volcano in Iceland - 16 measurements, in 5 of them volcanic dust was observed (9 files in the Database). The lidar measurements in Sofia were started on 18 April 2010 and finished on 25 May, when the eruption ended. Unfortunately, most of the spring this year was marked by rainy and cloudy weather unfavorable for continuous measurements. Moreover, the wind carried the volcanic ash away from Bulgaria during almost the entire month of April. The combination of these circumstances determined the relatively rare cases of lidar observations of volcanic dust transport over Sofia.

Additional information from BCS Sahara dust forecast maps and HYSPLIT backward air mass trajectories was used in the analyses. The low limit of volcanic dust layer observed frequently remained mixed with the PBL, at about 2-2.5 km altitude AGL. During the lidar measurement on 10 May, 2010, we observed simultaneously Saharan dust transport at ~3 km altitude AGL, and a volcanic dust layer positioned at ~7 km altitude AGL.

(I. Grigorov, G. Kolarov, D. Stoyanov)

    

2. Experimental and theoretical research

The main investigations of the atmospheric boundary layer (ABL) over an urban area concerned the following: 1) determination of the heights of the stable boundary layer (SBL), the residual layer (RL) and the mixing layer (ML); 2) determination of the optical characteristics of the aerosol by means of a sun photometer; 3) measurements of the aerosol size distribution and concentration in different regions of the valley. To fulfill the above tasks, regular weekly measurements were carried ceilometer type CHM 15k. The data were examined and analyzed. The zones of tropopause and cirrus clouds were determined. The data obtained during a complex experiment (June 2010) by a ceiolometer, an aerosol lidar, a sun photometer, a laser particle counter (LPC) and meteorological stations near the Institute of Electronics (IE), at the Astronomical Observatory in Borisova Gradina Park (AO) and at the Central Geophysical Station (CGS), Plana, were compared and analyzed. The ABL is an important element of the Earth's climate system where heat, momentum, humidity and gaseous compounds exchange takes place, thus determining the structure of the lower atmosphere, the proliferation of pollutants and the formation of clouds. The height of ABL is often identified by the height of the mixing layer which is an important parameter that determines the height of the volume where the atmospheric aerosol and different gaseous compounds are spread and the physic-chemical transformations take place. The main aerosol load over an urban area situated in a mountain valley is spread in the first 2 − 3 km (up to 4 km).

In recent years, the atmospheric aerosol attracted attention due to its relation to the climate change. In contrast with the greenhouse gases which cause only warming, the aerosol can cause both cooling and warming of the atmosphere depending on its optical characteristics, in particular, its single-scattering albedo and absorption. The main optical characteristics of the atmospheric aerosol are the aerosol optical depth (AOD, τ_a) and the Angström coefficients α and β. AOD is part of the total optical depth that determines the extinction of solar radiation passing through an atmospheric layer. The Angström coefficient α is related to the aerosol size distribution, while β is related to the atmospheric turbidity.

(I. Kolev, Ts. Evgenieva and N. Kolev)

The studies were continued of the different layers of the ABL, namely, the SBL, the RL and the ML during spring-summer and autumn-winter. The heights and stages of formation in the cases of "dry" and "wet" convective boundary layer were determined. The results were compared with theoretical data obtained by using the Whiteman and McKee's model. The possibilities were examined to determine the impact of the different radiative processes on the ML formation stages (in view of assessing the influence of the atmospheric aerosol, atmospheric humidity and soil humidity). The studies were continued of the atmospheric aerosol optical characteristics during ABL formation by means of aerosol lidar and sun photometer. The investigations of the influence of the ABL on the near-ground ozone concentration taking into account the specific meteorological parameters near the IE, at the AO and at the CGS, Plana, were also continued.

(I. Kolev, Ts. Evgenieva and N. Kolev)

A two-stage experimental campaign was carried out from 01.10.2008 to 22.10.2008 near the IE and at the AO. The first stage was aimed at calibrating the Bulgarian sun photometer by simultaneous measurements with an Indian sun photometer calibrated recently in the USA (this stage was described in the Annual Report 2009). The aim of the second stage was to determine the AOD and water vapor content (WVC) at two points in Sofia during the ABL formation. Several types of AOD and WVC behavior were observed. The ML height varied from 400 to 1600 (2000) m. The RL height varied from 800 to 2000 m and the SBL height was in the range from 200 to 400 m. The AOD values at the wavelength of λ = 500 nm ranged from τ_а = 0.25 to 0.42, and the WVC values, from 1 cm to 2 cm. The joint interpretation of lidar and sun photometer data was performed under the assumption that most of the aerosol was located in the ABL in the absence of volcanic eruptions and Saharan dust events.

(I. Kolev, Ts. Evgenieva and N. Kolev)

The measurements of the optical characteristics of the aerosol were continued at two points - the IE and the AO. Two periods were observed in the AOD behavior at the wavelength of λ = 500 nm. The first one is more dynamic and takes place from sunrise up to 10:30 h.

The second one, when the AOD is more stable, occurs during the ABL formation.

(I. Kolev, Ts. Evgenieva and N. Kolev)

The investigations of the influence of the ML height on the near-ground ozone concentration were continued. Three types of near-ground ozone concentration behavior were observed at the IE, the AO and the CGS, Plana, depending on the different temporal and spatial development of the ABL.

(V. Grigorieva, I. Kolev, Ts. Evgenieva and N. Kolev)

Data acquisition at the AO by means of the CHM 15k ceilometer was continued. The device allows observations of the atmosphere in the range from 100 to 15 000 m. The data were collected automatically for 24 hours and were regularly examined and analyzed. The data on the ABL height obtained by the aerosol lidar (IE) and the ceilometer (AO) were compared. The comparisons showed that the ML development near the AO was delayed by about 1 - 1.5 hours compared to the ML formation near the IE, especially in what concerns the time when the ML reached its maximum height. The maximum ML height near the AO was in some cases greater by 100 - 200 m than the one measured at the IE. The heights of the tropopause and the cirrus clouds were observed, as well as the fronts penetrating the entire tropospheric layer.

(I. Kolev and N. Kolev)

The complex experiment carried out in June 2010 was an expansion of the experimental campaign in May 2009 near the IE, AO and CSG, Plana. Part of results were processed, analyzed and prepared for a conference paper and can be summarized as follows: Based on the joint interpretation of the sun photometer, aerosol lidar and ceilometer data, we assessed the influence of the atmospheric aerosol in the PBL and the significant influence of aerosol layers and high clouds in the entire troposphere on the values of aerosol optical depth. The near-ground ozone concentration in the urban area approaches the values of the near-ground ozone concentration at the CGS, Plana, and Kopitoto Station when the mixing layer is fully developed (reaches its maximum height).

(I. Kolev, Ts. Evgenieva and N. Kolev)

The modulated optical reflectance (MOR) technique, whereby the optical reflectance variation is observed of a scanned sample surface subjected to periodic photothermal modulation, was applied to the structural analysis and defectoscopy of thin layers of the ferromagnetic La_0,7Sr_0,3MnO₃ structure (LSMO). A combination of a pumping laser diode and a probe He-Ne laser in a dual wavelength setup provides an electrical signal proportional to the modulated reflectance at each point of the sample. The detected beam is filtered and modulated selectively by reflection without interference by the substrate properties, the probe beam or external fields. The laser beams are aligned precisely in the focal spot, thus determining a spatial resolution of 10 µm and confining the region of thermal interaction on the sample surface. The micron precision of the fiber optics tract in our system and the multimode structure of the optical fiber used reduce the interference noise, which would otherwise cause a substantial error. Efficient spectral separation of the two collinear laser beams directed by the fiber optics tract was achieved using the diffraction grating of a monochromator and a high-finesse interference filter, so that the probe beam is modulated solely by the reflectance variation. The improved fiber-optics based scheme is suitable for high-resolution surface imaging and structural analysis. It was shown that the low contrast between the optical reflectance of the interface of a conductive film and a dielectric substrate, which is due to the close similarity of the two materials' optical properties, can be greatly enhanced by detecting the MOR signal. The theoretical and experimental results were discussed of the study of LSMO thin-film samples by applying photothermal modulation of the optical reflectance. Being based on the Drude effect, MOR by definition is proportional to the relative variation of the modulated-light reflectance divided by the unmodulated absolute reflectance of the sample surface at the wavelength of the He-Ne laser (632.8 nm). It was shown that MOR as a function of temperature at certain conditions near the phase transition temperature is proportional to the variations of the charge carrier density and the magnetoresistance derivative with respect to the temperature. The film resistance was measured by the four-wire method (Kelvin bridge) simultaneously with the MOR signal. The temperature profile of the modulated reflectance increased somewhat, with a maximal value around the Curie point, and then decreased in the paramagnetic phase in good agreement with the film resistivity values calculated from the experimental data. The experimental results validated the MOR method for measurements of the surface quality and the magnetoresistive properties at different temperatures near the Curie point. Further studies using the MOR method are planned of ferromagnetic films in strong magnetic fields in view of applications to the implementation of new magnetoresistive memories and sensors. The development of the contactless measurement technique described, reported in several publications, was supported by the Bulgarian National Science Fund under the thematic project New Magnetic and Magnetoelectric Materials for the Next Generation Electronic Devices.

(V.Pencheva, S.Pencheva, V.Naboko)

The propagation was investigated of a cw laser beam through homogeneous tissue-like turbid media, such as diluted emulsions of Intralipid or milk having presumably sharply forward-directed Henyey-Greenstein or Gaussian indicatrices. The cross-sectional radial distributions were experimentally determined of the forward-propagating light power detected at different depths along the beam axis in each medium of interest. The detected-power spatial distribution for both the types of indicatrices was described analytically by solving the radiative transfer equation in the so-called small-angle approximation. The experimental results are consistent with the analytical expressions obtained that have been shown to allow one to estimate the extinction (α_t), reduced-scattering (α_rs) and absorption (α_a) coefficients and the g-factor of the media investigated. The values obtained of α_t, α_rs and g of the dilutions were quite reasonable and, depending on the dilution turbidity, behaved in the way observed formerly in other similar experiments. The comparative analysis of the estimated characteristics of the dilutions showed that in the case of a Henyey-Greenstein indicatrix one has a smaller value of the g-factor and a larger value of α_rs as compared to the case of a Gaussian indicatrix. At equal g-factors, in the former case one shall have a narrower forward-propagating scattered-light beam with higher on-axis intensity as compared to the latter case.

(L. Gurdev, I. Bliznakova, T. Dreischuh, O. Vankov, L. Avramov, D. Stoyanov)

A novel approach was proposed and investigated of determining by means of GRAYDAR (Gamma Ray Detection and Ranging) the in-depth partial-density profile of a substance absorbed in a dense medium with known gamma-ray extinction distribution. By solving the graydar equation, analytical algorithms were derived for retrieving the in-depth profile of the partial density of the absorbed substance on the basis of the conjecturally known in-depth profile of the extinction of the absorbing medium and the experimentally determinable graydar profile. The retrieval error under Poisson noise conditions was also estimated analytically. The simulations performed of the Poisson-noise effect concern the case of soil moisture. The results obtained confirm the validity of the retrieval algorithms derived and the error estimates and showed that the soil moisture profile may be accurately determined to depths of 50 cm, depending on the dry-soil bulk density, the sensing photon flux, and the measurement time.

(L. L. Gurdev, T. N. Dreischuh, D. V. Stoyanov)

Systematic studies and analyses were carried out of the dynamic characteristics of the aerosol in the lower atmospheric layers over a heterogeneous orographic region that includes adjacent urban, plain, and mountain zones near the city of Sofia. Measurements under different atmospheric conditions were performed at two wavelengths (1064 nm and 532 nm) by using the two channels of an aerosol lidar based on a high-power Nd:YAG laser. Range profiles of the atmospheric backscattering coefficient, the range-corrected lidar signal, the normalized standard deviation, and the backscattering-related ?ngstrom exponent were obtained and analyzed, as averaged over the time and/or range of measurements, as well as in their temporal evolution with a resolution of 2 s. The dynamic measurements results were presented as color-map time-height diagrams. Taking advantage of the two-wavelength lidar sounding, statistical quasi-quantitative analysis of the spatial density distribution and the temporal dynamics of both the fine-mode and coarse-mode aerosol fractions was performed in an orographic aspect. The mean-particle-size values were estimated and the zones of the most intensive dynamics were determined for the two aerosol fractions. The results obtained show the strong impact of the heterogeneous orography on the atmospheric dynamics, as well as the possibility of using the lidar system for investigating the distribution and dynamics of aerosol fractions over large areas with high spatial and temporal resolution.

(Z. Peshev, A. Deleva)

Lidar observations of the aerosol content in the troposphere were performed twice weekly in accordance with the EARLINET protocol and depending on the meteorological conditions. The measurements were carried out in correlation with of Barcelona super-computing center's forecasts concerning the spreading of Saharan mineral dust over Europe on days with dust cloud present over Sofia. The lidar data obtained at two wavelengths (1064 nm and 532 nm) were processed and the vertical profiles of the aerosol backscatter coefficient were calculated. Some of these profiles were visualized by 2D color-maps illustrating both the spatial distribution and the temporal evolution of aerosol density for the observed aerosol fields.

(Z. Peshev, A. Deleva)

    

3. Lidar diagnostics of thermonuclear plasma

A novel, entirely software, approach was developed for processing the JET (Culham, UK) core Thomson scattering lidar data that allows one to improve substantially the resolution of the electron temperature and density profiles measurements in thermonuclear plasma. This approach is important because of the opportunity it provides for a more reliable description of the characteristic pedestal intrinsic to the radial distribution of the electron temperature and density in H-mode plasma state. In general, the method is based on deconvolution procedures and a method for signal sampling with improved resolution based on the lack of synchronization between the laser pulse and the sampling generator. This allows a finer discretization of the lidar profiles and, correspondingly, by solving an inverse problem, determination with better resolution of the electron temperature and density profiles. The simulations performed confirmed the efficiency of the approach and the possibility of achieving a resolution interval of the order of 1 cm. The efficiency of the method was demonstrated by real data processing. The results obtained are in good agreement with those obtained by the High Resolution Thomson Lidar used for measurements near the boundaries of the plasma torus. The investigations were performed under a contract within the 7th Framework Program of the European Atomic Energy Community (Euratom).

(D. V. Stoyanov, T. N. Dreischuh, L. L. Gurdev)

Using statistical modeling, the possibilities were investigated of applying deconvolution techniques for high-resolution restoration of the electron temperature profiles in fusion plasma reactors, such as the Joint European Torus (JET), measured by Thomson scattering lidar using the center-of-mass wavelength approach. The sensing laser-pulse shape and the receiving-system response function were assumed to be exponentially-shaped. The plasma light background influence was taken into account, together with the Poisson fluctuations of the number of photoelectrons following photocathode cascade multiplication in the microchannel photomultiplier tube used. It was shown that the Fourier-deconvolution of the measured long-pulse (lidar-response-convolved) lidar profiles, at relatively high and low signal-to-noise ratios, ensures a higher accuracy of recovering the electron temperature profiles with three times as high range resolution compared to the case without deconvolution. The final resolution scale was determined by the width of the window of an optimum monotone sharp-cutoff digital noise-suppressing (noise-controlling) filter applied to the measured lidar profiles. The investigations were performed under a contract within the 7th Framework Program of the European Atomic Energy Community (Euratom).

(T. N. Dreischuh, L. L. Gurdev, D. V. Stoyanov)

    

4. Signal processing

The work was focused on the atmospheric turbulence effect and a new method for determining the optical signal attenuation caused by turbulence. The new technique of power budget of optical links makes use of the optical intensity distribution in a laser beam after the beam has passed through a turbulent atmosphere. The results obtained were compared with Rytov approximation which is nowadays the most frequently used method for determining turbulent attenuation.

(G.Kolarov, I.Grigorov D.Stoyanov)

    

5. Lidar hardware & software

During the year we renovated the optical receiving system of the CuBr lidar. The receiving telescopes were replaced by astronomical type telescopes with more precise tuning mechanisms. As a result, the spatial alignment of both telescopes with respect to the laser beam direction was substantially improved.

(V.Pencheva, S.Penchev, V.Naboko)

A software package (based on deconvolution approaches) was developed for the purpose of performing computer simulations and high-resolution processing of real data from the Thomson scattering lidar systems for contactless diagnostics of high-temperature plasma in JET (Culham, UK).

(D. Stoyanov, T. Dreischuh)

Models, algorithms and special purpose software of the system of laser photothermal contactless control were developed. Investigation of models and their capability for transition to another standard of interface connection, such as USB v. 2.0, between the computer and the signal detector system (hardware software and technological peculiarities) was carried out. The possibility of adaptation of the high-frequency input data stream to the real transmission rate of the interface of the lidar was analyzed.

The following equipment was developed and implemented:

• A microprocessor system for thermostat control and temperature profiling of the samples investigated.
• A detector of signals of modulated reflectance of the sampled surface and successive transfer for processing to the computer system
• A linear analog thermostat using a Peltier element and a vacuum chamber enabling external input and temperature control.
• A two-channel high-frequency buffer transimpedance amplifier for low-resistance high-frequency detectors using a high-resistance signal source.
• A driver for high-power CW laser diodes synchronized and power-modulated by in the system for laser photothermal contactless analysis.
• An experimental system for thermal regulation and thermostat for the samples investigated designed for laser photothermal contactless analysis.

(V.Pencheva, S.Pencheva, V.Naboko)

    

    

    

PUBLICATIONS

During year 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001.

    

2010

1. Pappalardo G, Wandinger U, Mona L, Hiebsch A, Mattis I, Amodeo A, Ansmann A, Seifert P, Linne H, Apituley A, Arboledas L A, Balis D, Chaikovsky A, Comeron A, D'Amico G, Freudenthaler V, Grigorov I, Papayannis A, Perrone M R, Pietruczuk A, Pujadas M, Rizi V, Spinelli N, Wang X and Wiegner M

   EARLINET correlative measurements for CALIPSO: First intercomparison results

   J. Geophys. Res.-Atmospheres 115 D00H19 doi:10.1029/2009JD012147

2. Gurdev L L, Dreischuh T N, Stoyanov D V and Protochristov Ch N

   On the possibility of determining the distribution of a substance penetrating into a dense medium using gamma-ray detection and ranging approach

   Acta Physica Polonica А 118/4 540-9 PL ISSN 0587-4246 (printed), PL ISSN 1898-794X (online)

3. Pencheva V, Penchev S, Nedkov I, Kutzarova T and Naboko V

   Modulated optical reflectance method of magnetoelectric nanomaterials

   J. Phys.:Conf. Series 223 No.:01 2041 ISSN: 1742-6588 (print) ISSN: 1742-6596 (online)

4. Stoyanov D, Beurskens M, Dreischuh T, Gurdev L, Ford О, Flanagan J, Kempenaaras M, Balboa I and Walsh M

   Resolving the plasma electron temperature pedestal in JET from Thomson scattering Core LIDAR data

   Proc. 37^th EPS Conf. Plasma Phys. ECA 34A P5.133 (European Phys. Soc. Geneva) ISBN 2-914771-62-2

5. Peshev Z Y, Deleva A D, Dreischuh T N and Stoyanov D

   Lidar measurements of atmospheric dynamics over high mountainous terrain

   AIP Conf. Proc. 1203 1108-1113 (Melville New York), ISBN 978-0-7354-0740-4

6. Penchev S, Pencheva V, Nedkov I, Kutzarova T and Naboko V

   Laser photothermal analysis of magnetoelectric materials

   AIP Conf. Proc. 1203 273-7, (Melville New York) ISBN 978-0-7354-0740-4

7. Deleva A D, Peshev Z Y, Slesar A S, Denisov S V, Avramov L A and Stoyanov D V

   Vertical profiling of atmospheric backscatter with a Raman-aerosol lidar

   AIP Conf. Proc. 1203 388-93 (Melville New York) ISBN 978-0-7354-0740-4

8. Vidolova E, Peshev Z, Shaquiri Z and Angelov D

   Dynamic methods for investigating the conformational changes of biological macromolecules

   AIP Conf. Proc. 1203 1085-89 (Melville New York) ISBN 978-0-7354-0740-4

9. Dreischuh T N, Gurdev L L and Stoyanov D V

   Monte-Carlo analysis of the accuracy of a novel Thomson scattering lidar approach to measuring the electron temperature in fusion plasmas

   AIP Conf. Proc. 1203 1468-73 (Melville New York) ISBN 978-0-7354-0740-4

10. Gurdev L L, Bliznakova I A, Dreischuh T N, Vankov O I, Stoyanov D V and Avramov L

    A quantitative analysis of experimental data on the effects accompanying the propagation of laser radiation through biological-tissue-like turbid media

    AIP Conf. Proc. 1203 716-21 (Melville New York) ISBN 978-0-7354-0740-4

11. Grigorov I, Kolarov G and Stoyanov D

    Remote monitoring of aerosol layers over Sofia in the frame of EARLINET-ASOS project

    AIP Conf. Proc. 1203 585-90 (Melville New York) ISBN 978-0-7354-0740-4

12. Pappalardo G, Amodeo A, Ansmann A, Apituley A, Arboledas L A, Balis D, Bockmann Ch, Chaikovsky A, Comeron A, D'Amico G, Tomasi F, Freudenthaler V, Giannakaki E, Giunta A, Grigorov I, Gustafsson O, Gross S, Haeffelin M, Iarlori M, Kinne S, Linne H; Madonna F, Mamouri R, Mattis I, McAuliffe M, Molero F, Mona L, Muller D, Mitev V, Nicolae D, Papayannis A, Perrone M R, Pietruczuk A, Pujadas M, Putaud J-P, Ravetta F, Rizi V, Serikov I, Sicard M, Simeonov V, Spinelli N, Stebel K, Trickl T, Wandinger U, Wang X, Wagner F and Wiegner M

    EARLINET observations of the Eyjafjallajökull ash plume over Europе,

    Proc. SPIE 7832, 783217

13. Deleva A

    Lidar monitoring of Saharan dust transport over the city of Sofia in the period 2006-2008

    Bulgarian Geophysical Journal 36 pp 18-25

14. Deleva A, Slesar A and Denisov S

    Investigations of the aerosol fields and clouds in the troposphere with Raman-aerosol lidar

    Bulgarian Geophysical J.l 36 26-39

15. Kolev N I, Savov P B, Donev E H, Ivanov D I, Blagoev A P, Kaprielov B K, Grigorieva V N, Danchovski V C and Kolev I N

    Atmospheric boundary layer and surface ozone concentration study over Sofia area by lidar and ozonemeter

    Bulgarian Geophysical J. 36 3-17

16. Pencheva V, Penchev S, Nedkov I, Kutzarova T and Naboko V

    Analysis of modulated optical reflectance applied to magnetoelectric nanomaterials

    Comptes Rendus de l'Academie Bulgare des Sciences 63/8 1111-6 ISSN pp 1310-1331

17. Evgenieva Ts, Wiman Bo L B, Kolev N, Donev E, Ivanov D, Danchovski V, Petkov D, Grigorieva V and Kolev I

    Lidar, ceilometer and sun photometer investigation of the aerosol optical characteristics in the troposphere over Sofia, Bulgaria

    Comptes rendus de l'Academie Bulgare des Sciences 63/8 1191-1200

18. Evgenieva Ts, Tatarov B, Wiman Bo L B, Kolev N, Donev E, Ivanov D, Danchovski V, Petkov D, Grigorieva V and Kolev I

    Remote sensing and in situ investigation of the atmosphere over mountain valley (Sofia-Bulgaria)

    Proc. 25^th Int. Laser Radar Conf. (St. Petersburg, Russia) pp 1138-41

19. Kolev N, Evgenieva T, Petkov D, Kolev I, Devara P, Raj P E

    Lidar and two sun photometers observations in Sofia (Bulgaria)

    Proc. 25^th Int. Laser Radar Conf. (St. Petersburg, Russia) pp 1142-45

20. Dreischuh T, Atanasov P A, Sabotinov N V (Eds)

    Proc. SPIE 7751 - 18^th Int. Symp. Gas Flow, Chemical Lasers and High-Power Lasers,

    (SPIE, Bellingham, WA, USA, 2010)

    

PATENTS SUPPORTED

1. Stoyanov D, Gurdev L, Dreischuh T, Vankov O, Protochristov C

   Radar on single spontaneously emitted gamma-photons,

   Patent No 65770 B (2009).

2. Stoyanov D, Gurdev L, Dreischuh T, Vankov O, Avramov L, Borisova E

   Optical multichannel transceiving system,

   Patent No 65769 B (2009).

    

EUROPEAN PATENTS UNDER CONSIDERATION

1. Stoyanov D, Dreischuh T, Gurdev L, Vankov O, Avramov L, Borisova E, Bliznakova I

   Method for determining optical and spatial characteristics of an inclusion in a turbid medium using multiple-scattering optical tomography

   Priority 13.08.2008, Applicant - Siemens Aktiengesellschaft, Germany; Patent No. EP2153772-A1, published on 17.02.2010-EP Bulletin [2010/07].

2. Stoyanov D, Dreischuh T, Gurdev L, Vankov O, Avramov L, Borisova E, Bliznakova I

   Apparatus for determining optical and spatial characteristics of an inclusion in a turbid medium using multiple-scattering optical tomography

   Priority 10.11.2008, Applicant - Siemens Aktiengesellschaft; Patent No.EP2165647A1, published on 24.03.2010-EP Bulletin [2010/12].

    

CONFERENCES

1. Stoyanov D, Beurskens M, Dreischuh T, Gurdev L, Ford O, Flanagan J, Kempenaars M, Balboa I and Walsh M,

   Resolving the plasma electron temperature pedestal in JET from Thomson scattering core LIDAR data,

   37^th EPS Conf. Plasma Phys. 21-25 June 2010, Dublin, Ireland.

2. Deleva A, Peshev Z and Avramov L,

   Laser remote sensing of tropospheric aerosols and clouds,

   16^th Int. School on Quantum Electronics "Laser Physics and Applications", 20-24 Sept. 2010, Nessebar, Bulgaria.

3. Grigorov I, Stoyanov D and Kolarov G,

   Lidar observation of volcanic dust layers over Sofia,

   16^th Int. School on Quantum Electronics "Laser Physics and Applications", 20-24 Sept. 2010, Nessebar, Bulgaria.

4. Dreischuh T, Gurdev L and Stoyanov D,

   Statistical modeling of deconvolution procedures for improving the resolution of measuring electron temperature profiles in tokamak plasmas by Thomson scattering lidar,

   16^th Int. School on Quantum Electronics "Laser Physics and Applications", 20-24 Sept. 2010, Nessebar, Bulgaria.

5. Kolev N, Evgenieva Ts, Nenchev R, Kaprielov B and Kolev I,

   Three-year lidar investigations in the atmospheric boundary layer over Sofia, Bulgaria,

   16^th Int. School on Quantum Electronics "Laser Physics and Applications", 20-24 Sept. 2010, Nessebar, Bulgaria.

6. Evgenieva Ts, Kolev N, Iliev I, Kolev I, Devara P C S and Raj P E,

   Height of the planetary boundary layer, aerosol optical depth and water vapor content determined by lidar and sun photometer,

   16^th Int. School on Quantum Electronics "Laser Physics and Applications", 20-24 Sept. 2010, Nessebar, Bulgaria.

7. Grigorieva V, Evgenieva Ts, Kolev N, Donev E, Ivanov D and Danchovski V,

   Case studies of the surface ozone and atmospheric boundary layer over Sofia, Bulgaria,

   16^th Int. School on Quantum Electronics "Laser Physics and Applications", 20-24 Sept. 2010, Nessebar, Bulgaria.

8. Peshev Z, Deleva A, Dreischuh T and Stoyanov D,

   Dynamic characteristics of atmospheric layers over complex terrain probed by a two-wavelength lidar,

   16^th Int. School on Quantum Electronics "Laser Physics and Applications", 20-24 Sept. 2010, Nessebar, Bulgaria.

9. Pencheva V, Penchev S, Nedkov I and Kutzarova T,

   Investigation of ferromagnetic properties of LSMO nanolayers by laser modulated reflectance probe,

   16^th Int. School on Quantum Electronics "Laser Physics and Applications", 20-24 Sept. 2010, Nessebar, Bulgaria.

10. Bliznakova I, Gurdev L, Dreischuh T, Vankov O, Avramov L and Stoyanov D,

    A dual interpretation of experimental data concerning the propagation of laser light through tissue-like turbid media,

    16^th Int. School on Quantum Electronics "Laser Physics and Applications", 20-24 Sept. 2010, Nessebar, Bulgaria.

11. Evgenieva Ts, Tatarov B, Wiman Bo L B, Kolev N, Donev E, Ivanov D, Danchovski V, Petkov D, Grigorieva V, and Kolev I,

    Remote sensing and in situ investigation of the atmosphere over mountain valley (Sofia-Bulgaria),

    25^th Int. Laser Radar Conf., (5-9 July 2010, St .Petersburg, Russia).

12. Kolev N, Evgenieva T, Petkov D, Kolev I, Devara P and Raj P E,

    Lidar and two sun photometers observations in Sofia (Bulgaria),

    25^th Int. Laser Radar Conf., (5-9 July 2010, St .Petersburg, Russia).

13. Evgenieva Ts, Wiman Bo L B, Kolev N, Donev E, Savov P, Ivanov D, Danchovski V, Petkov D, Kaprielov B, Grigorov I., Grigorieva V and Kolev I,

    Tropospheric aerosol observation by ground based active and passive remote sensing over Sofia, Bulgaria,

    38^th COSPAR Scientific Assembly, 18 - 25 July 2010, Bremen, Germany.

Top

    

2009

1. Gogosheva Ts N, Grigorieva V N, Evgenieva Ts T, Mendeva B D, Kolev N I, Krastev D G and Petkov B H

   Recent ozone investigations over Bulgaria by remote sensing: ground-based and satellite data

   Advances in Space Research 43 201-5

2. Bliznakova I, Vankov O, Dreischuh T, Avramov L and Stoyanov D

   Measurement of small variations in optical properties of turbid ingredients with respect to surrounding turbid medium

   Acta Physica Polonica А 116/4 681-3 PL ISSN 0587-4246 (printed), PL ISSN 1898-794X (online

3. Evegnieva Ts, Kolev N, Iliev I, Savov Pl, Kaprielov B, Devara P C S and Kolev I

   Lidar and spectroradiometer measurements of the atmospheric aerosol optical characteristics over urban area (Sofia, Bulgaria)

   Int. J. Remote Sensing 30/24 6381 - 6401. DOI: 10.1080/01431160902865764

4. Nikolov A S, Atanasov P A, Milev D R, Stoyanchov T R, Deleva A D and Peshev Z Y

   Synthesis and characterization of TiO_x nanoparticles prepared by pulsed-laser ablation of Ti target in water

   Appl. Surf. Sci. 255 5351-4

5. Vidolova E P, Peshev Z Y and Angelov D

   Dynamic probing of nucleic acid-protein interactions by biphotonic laser chemistry

   J. Optoelectr. Adv. Mater. 11/9 1198-1201

6. Papayannis A et al. and Grigorov I

   Coordinated lidar observations of Saharan dust over Europe in the frame of EARLINET-ASOS project during CALIPSO overpasses: a strong dust case study analysis with modeling support

   Proc. SPIE 7479 7479OC DOI: 10.1117/12.830842

7. Danov M, Stoyanov D and Petkov D

   Measurement of the scattering of rock samples in the thermal infrared band

   Comptes rendus de l'Academie Bulgare des Sciences 62/12 1581-6

8. Dreischuh T, Gurdev L, Stoyanov D, Beurskens M, Walsh M, Capel A and JET EFDA contributors

   Statistical modeling of the error in the determination of the electron temperature in JET by a novel Thomson scattering LIDAR approach

   Proc. 36^th EPS Conference on Plasma Physics (Sofia Bulgaria) 33E P-2.149 ISBN:2-914771-61-4

9. Stoyanov D, Dreischuh T, Gurdev L, Beurskens M, Ford O, Flanagan J, Kempenaars M, Balboa I, Walsh M and JET EFDA Contributors

   Deconvolution of JET CORE LIDAR data and pedestal detection in retrieved electron temperature and density profiles

   Proc. 36^th EPS Conference on Plasma Physics (Sofia Bulgaria) 33E P-2.155 ISBN:2-914771-61-4

10. Dreischuh T N, Gurdev L L and Stoyanov D V

    Monte-Carlo analysis of the accuracy of a novel Thomson scattering lidar approach to measuring the electron temperature in fusion plasmas

    American Inst. of Phys. Conf. Proc. 1203 1468-73, ISBN 978-0-7354-0740-4

11. Gurdev L L, Bliznakova I A, Dreischuh T N, Vankov O I, Stoyanov D V and Avramov L A

    Quantitative analysis of experimental data on the effects accompanying the propagation of laser radiation through biological-tissue-like turbid media

    American Inst. of Phys. Conf. Proc. 1203 716-21 ISBN 978-0-7354-0740

12. eshev Z Y, Deleva A D, Dreischuh T N and Stoyanov D V

    Lidar measurements of atmospheric dynamics over high mountainous terrains

    American Inst. of Phys. Conf. Proc. 1203 1108-13 ISBN 978-0-7354-0740-4

13. Deleva A D, Peshev Z Y, Slesar A S, Denisov S V, Avramov L A and Stoyanov D V

    Vertical profiling of atmospheric backscatter with a Raman-aerosol lidar

    American Inst. of Phys. Conf. Proc. 1203 388-93 ISBN 978-0-7354-0740-4

14. Vidolova E, Peshev Z, Shaquiri Z and Angelov D

    Dynamic methods for investigating the conformational changes of biological macromolecules,

    American Inst. of Phys. Conf. Proc. 1203 1085-90 ISBN 978-0-7354-0740-4

15. Grigorov I, Kolarov G and Stoyanov D

    Remote monitoring of aerosol layers over Sofia in the frame of EARLINET-ASOS Project

    American Inst. of Phys. Conf. Proc. 1203 585-90 ISBN 978-0-7354-0740-4

16. Grigorov I, Kolarov G and Stoyanov D

    Lidar remote monitoring of aerosol dust layers over Sofia

    Proc. XLIV Int. Conf. Information, Communication and Energy Systems and Technologies (June 2009 V. Tarnovo Bulgaria) 2 563-6

Top

    

2008

1. Gurdev L L, Dreischuh T N,

   On an approach for improving the range resolution of pulsed coherent Doppler lidars,

   J Modern Optics 2008;55/9:1441-62.

2. Evgenieva Ts, Kolev N, Iliev I, Kolev I,

   Investigation of the atmospheric aerosol optical characteristics by active and passive remote sensing over Sofia, 2008,

   Comptes Rendus Acad Bulg Sci 2008;61/6:721-26.

3. Kolev N, Grigorieva V, Savov P, Kaprielov B, Kolev I,

   The influence of the boundary layer development on the ozone concentration over urban area,

   Int J Remote Sensing 2008;29/7:1877-1902.

4. Evgenieva Ts, Kolev N, Iliev I, Kolev I,

   Aerosol optical depth determination by combination of lidar and sun photometer,

   Proc Int Conf Nucleation and Atmospheric Aerosols pp 1159-63, DOI 10.1007/978-1-4020-6475-3, Springer Publ 2008, The Netherlands.

5. Papayannis A, Amiridis V, Mona L, Tsaknakis G, Balis D, Bosenberg J, Chaikovski A, De Tomasi F, Grigorov I, Mattis I, Mitev V, Muller D, Nickovic S, Perez C, Pietruczuk A, Pisani G, Ravetta F, Rizi V, Sicard M, Trickl T, Wiegner M, Gerding M, Mamouri R E, D'Amico G, Pappalardo G,

   Systematic lidar observations of Saharan dust over Europe in the frame of EARLINET (2000-2002),

   J Geophys Res 2008;113:D10204.

6. Gurdev L L, Dreischuh T N, Stoyanov D V,

   Potential accuracies of some new approaches for determination by Thomson scattering lidar of the electron temperature profiles in thermonuclear plasmas,

   Proc SPIE 2008;7027:702711.

7. Bliznakova I, Vankov O, Dreischuh T, Avramov L, Stoyanov D,

   Spatial distribution of laser beam spreading in turbid tissue-like media containing ingredients,

   Proc SPIE 2008;7027:702719.

8. Kolarov G V, Grigorov I V, Stoyanov D V,

   Estimation of the ratio of aerosol to molecular backscattering by two closely disposed wavelengths using CuBr LIDAR sounding (510.6nm, 578.2nm),

   Proc SPIE 2008;7027:702710.

9. Grigorov I V, Kolarov G V, Stoyanov D V,

   Lidar measurements of Saharan dust transportation over Sofia,

   Proc SPIE 2008;7027:70270X.

10. Deleva A D, Grigorov I V, Avramov L A, Mitev V A, Slesar A S, Denisov S,

    Raman-elastic-backscatter lidar for observation of tropospheric aerosol,

    Proc SPIE 2008;7027:70270Y.

11. Mitev V A, Deleva A D, Grigorov I V,

    Remote velocity measurements of atmospheric inhomogeneities by imaging and statistical data processing,

    Proc SPIE 2008;7027:702712.

12. Evegnieva Ts, Iliev I, Kolev N, Sobolewski P, Pieterczuk A, Holben B, Kolev I,

    Optical characteristics of aerosol determined by Cimel, Prede and Microtops II sun photometers over Belsk (Poland),

    Proc SPIE 2008;7027:70270V.

13. Kolev N, Evegnieva Ts, Blindheim S, Lahnor B, Mogo S, Berjon A, Rodriguez E, Stebel K, Cachorro V, Gausa M, Kolev I,

    Summer lidar measurements in the troposphere over Alomar, Norway, 2007,

    Proc SPIE 2008;7027:70270W.

14. Danov M, Stoyanov D, Petkov D,

    Directional reflectance approach for emissivity estimation,

    Proc SPIE 2008;7027:702713.

15. Grigorieva V, Kolev N, Donev E, Ivanov D, Kaprielov B, Kolev I,

    Lidar boundary layer observations and ozone measurements in Sofia, Bulgaria,

    Proc SPIE 2008;7027:70270Z.

16. Pappalardo G, Bösenberg J, Amodeo A, Ansmann A, Apituley A, Arboledas L A, Balis D, Böckmann C, Chaikovsky A, Comeron A, D'Amico G, Freudenthaler V, Gigorov I, Hanson G, Linne H, Mattis I, Mona L, Müller D, Mitev V, Nicolae D, Papayannis A, Perrone M R, Pietruczuk A, Pujadas M, Putaud J-P, Ravetta F, Rizi V, Simeonov V, Spinelli N, Trickl T, Wandinger U, Wiegner M,

    EARLINET for long term observations of aerosol over Europe,

    Proc 24^th Int Laser Radar Conf, pp 711-14, June 2008, Boulder, Colorado, USA.

17. Mattis I, Müller D, Baars H, Tegen I, Meier J, Mona L, Pappalardo G, Amodeo A, D'Amico G, Stohl A, Wang X, Menendez F M, Sicard M, Rodriguez A, Baldasano J M, Grigorov I, Giannakaki E, Arboledas L A, Guerrero Rascado J L, Perez C, Apituley A, Gustafsson O,

    Complementary use of EARLINET, CALIPSO, and AERONET observations: case study July 2006,

    Proc 24^th Int Laser Radar Conf, pp 1121-24, June 2008, Boulder, Colorado, USA.

18. Kolev N, Gigorieva V, Kolev I, Devara P C S, Raj P E, Dani K K,

    Lidar, sunphotometer and ozonemeter measurements of urban boundary layer of the atmosphere over Sofia-Bulgaria,

    Proc 24^th Int Laser Radar Conf pp 947-50, June 2008, Boulder, Colorado, USA.

19. Evgenieva Ts, Tatarov B, Kolev N, Iliev I, Savov P, Kaprielov B, Kolev I,

    One year measurements of aerosol optical depth during development of the atmospheric boundary layer over urban area (Sofia-Bulgaria),

    Proc 24^th Int Laser Radar Conf pp 951-54, June 2008, Boulder, Colorado, USA.

20. Devara P C S, Saha S K, Raj P E, Dani K K, Kolev N, Savov P, Kolev I,

    Microphysical characteristics of aerosols and their relationship with surface meteorological parameters over Sofia, Bulgaria,

    Proc 24^th Int Laser Radar Conf pp 979-82, June 2008, Boulder, Colorado, USA.

21. Pencheva V, Naboko V, Zubov P, Penchev S,

    Laser system for photothermal nondestructiv material analysis,

    Proc 8^th Int Conf Solid State Chem and Modern Micro- and Nanotec pp 110-12, September 2008, Kislovodsk, Russia.

Top

    

2007

1. Gurdev L L, Stoyanov D V, Dreischuh T N, Protochristov C N, Vankov O I,

   Gamma-ray backscattering tomography approach based on the lidar principle,

   IEEE Trans Nucl Sci 2007;54:262-75.

2. Stoyanov D S, Nedkov I, Ausloos M,

   Retrieving true images through fine grid steps for enhancing the resolution beyond the classical limits: theory and simulations,

   J Microscopy 2007;226:270-83.

3. Gurdev L L, Dreischuh T N, Stoyanov D V, Protochristov C N,

   Gamma-ray lidar (GRAYDAR) in-depth sensing of optically opaque media,

   Nuclear Methods for Non-Nuclear Applications, ed. Ch. Stoyanov, (Heron Press Ltd, Sofia, Bulgaria) 2007.

   Bulg J Phys 2007;34/s1:333-48.

4. Gogosheva T, Grigorieva V, Mendeva B, Krastev D, Petkov B,

   Solar dynamics influence on the atmospheric ozone,

   Comp Ren Acad Bul Sci 2007;60:835-40.

5. Ferdinandov Е, Pachedjieva B, Bonev B, Saparev S,

   Joint Influence of heterogeneous stochastic factors on bit-error rate of ground-to-ground free-space laser communication system,

   Opt Comm 2007;270:121-7.

6. Ferdinandov E, Pachedjieva E,

   Image transfer by spatially modulated laser radiation,

   J Appl Electromagnetism, Athens, Greece, 2006;8:101-12, ISSN 1109.

7. Ferdinandov, E, Pachedjieva B, Todorov B,

   The influence of atmospheric turbulence on image transfer by spatially modulated laser radiation,

   J Appl Electromagnetism, Athens, Greece, 2006;8:1-12, ISSN 1109.

8. Dreischuh T N, Stoyanov D V, Gurdev L L, Protochristov C N,

   Gamma-ray lidar for sensing dense optically-opaque media,

   BAS News 2007;4/44:3-4.

9. Mitev V A, Deleva A D, Peshev Z Y, Grigorov I V,

   Simultaneous remote velocity measurements of different aerosol inhomogeneities by image data processing,

   Proc SPIE 2007:6604; 660425.

10. Pencheva V, Penchev S, Naboko V, Toyoda K, Donchev T,

    Laser heterodyne photothermal nondistructive method: extension to transparent probe,

    Proc SPIE 2007:6604; 660416.

11. Dreischuh T N, Gurdev L L, Stoyanov D V, Protochristov C N, Vankov O I,

    Application of a lidar-type gamma-ray tomography approach for detection and identification of buried plastic landmines,

    Proc SPIE 2007:6604;660420.

12. Gurdev L L, Dreischuh T N, Stoyanov D V,

    Potentialities of lidar-type single-sided optical tomography of tissues,

    Proc SPIE 2007:6604;66042I.

13. Evgenieva Ts, Kolev N, Iliev I, Kaprielov B, Kolev I,

    Aerosol optical depth determined by lidar and spectrometer,

    Proc SPIE 2007:6604;660422.

14. Kolev N, Grigorieva V, Kaprielov B, Kolev I,

    Variations in the ozone concentration during the boundary layer development over urban area,

    Proc. SPIE 2007:6604;660421.

15. Grigorov I, Kolarov G, Kaprielov B, Kolev N, Deleva A, Peshev Z, Stoyanov D,

    Intercomparison of the three lidar system in Sofia,

    Proc SPIE 2007:6604;66041Z.

16. Danov M, Tsanev V, Petkov D,

    Spectral emissivity measurement of rocks and rock-forming minerals,

    Proc SPIE 2007:6604;660426.

17. Pappalardo G, Bosenberg J, Amodeo A, Ansmann A, Apituley A; Arboledas L A, Balis B, Bockmann C, Chaikovsky A, Comeron A, Freudenthaler V, Hansen G, Mitev M, Nicolae D, Papayannis A, Perrone M R, Pietruczuk A, Pujadas M, Putaud J P, Ravetta F, Rizi V, Simeonov V, Spinelli N, Stoyanov D, Trickl T, Wiegner M,

    EARLINET-ASOS: Programs and perspectives for the aerosol study on continental scale,

    Proc SPIE 2006:6367;636701.

18. Amodeo A, Pappalardo G, Bosenberg J, Ansmann A, Apituley A, Arboledas L A, Balis D, Bockmann C, Chaikovsky A, Comeron A, Freudenthaler V, Gustaffson O, Hansen G, Mitev V, Nicolae D, Papayannis A, Perrone M R, Pietruczuk A, Pujadas M, Putaud J P, Ravetta F, Rizi V, Simeonov V, Spinelli N, Stoyanov D, Trickl T, Wiegner M,

    A European research infrastructure for the aerosol study on a continental scale: EARLINET-ASOS,

    Proc SPIE 2007; 745:67450Y.

19. Amodeo A, Mattis I, Bockmann C, D'Amico G, Muller D, Osterloh L, Chaikovsky A, Pappalardo G, Ansmann A, Apituley A, Arboledas L A, Balis D, Comeron A, Freudenthaler V, Mitev V, Nicolae D, Papayannis A, Perrone M R, Pietruczuk A, Pujadas M, Putaud J P, Ravetta F, Rizi V, Simeonov V, Spinelli N, Stebel K, Stoyanov D, Trickl T, Wiegner M,

    Optimization of lidar data processing: a goal of the EARLINET-ASOS project,

    Proc SPIE 2007;6750:67500F.

20. Mattis I, Mona L, Muller D, Pappalardo G, Arboledas L A, D'Amico G, Amodeo A, Apituley A, Baldasano J M, Bockmann C, Bosenberg J, Chaikovsky A, Comeron A, Giannakaki E, Grigorov I, Rascado J, Gustafsson O, Iarlori M, Linne H, Mitev V, Menendez F M, Nicolae D; Papayannis A, Pando C, Perrone M R, Pietruczuk A, Putaud J P, Ravetta F, Rodriguez A, Seifert A, Sicard M, Simeonov V, Sobolewski P, Spinelli N, Stebel K, Stohl A, Tesche M, Trickl T, Wang X, Wiegner M,

    EARLINET correlative measurements for CALIPSO,

    Proc SPIE 2007;6750:67500Z.

21. Danov M, Tsanev V, Stoyanov D,

    Measuring the spectral emissivity of rocks and the minerals that form them,

    SPIE Newsroom 2007;10.1117/2.1200707.0788.

22. Ferdinandov E, Paxhedjieva B, Bonev B, Dimitrov K,

    Influence of the atmospheric transparency fluctuations on bit-error rate of ground-to-ground free-space laser communication system,

    Електротехника и електроника 2006;11-12:46-52, ISSN 0861-4717.

23. Slesar A S, Denisov S, Deleva A D, Peshev Z Y, Stoyanov D V, Chaykovsky A P,

    Receiving system and data processing software for the aerosol channel of a combined Raman-aerosol lidar,

    Proc 4^th Int Conf Lasers & Informational Technol (ILLA/LTL'2006, Smolian, Bulgaria), ISSN 1312-0638 2007:306-9.

24. Mitev V, Deleva A, Peshev Z, Grigorov I,

    Remote sensing of air turbulence using an imaging laser beam cross section intensity fluctuation,

    Proc 4^th Int Conf Lasers & Informational Technol (ILLA/LTL'2006, Smolian, Bulgaria), ISSN 1312-0638 2007:207-10.

25. Deleva A D, Peshev Z Y, Mitev V A, Avramov L A, Stoyanov D S,

    Mountain-surface mapping by using a powerful lidar system,

    Proc 4^th Int Conf Lasers & Informational Technol (ILLA/LTL'2006, Smolian, Bulgaria), ISSN 1312-0638 2007:310-314.

26. Penche V, Naboko V, Penchev St, Zabov P, Donchev T, Basheva Hr,

    Non-destructive photothermal analysis of transparent media,

    Proc. 7^th Int Conf Solid-State Chemistry and Modern Micro- and Nano-Technologies (2007 Kislovodsk, Russia) pp. 45-7.

27. 1. Grigorov, I., Kolarov, G.

    Measurements of atmospheric parameters using aerosol lidar,

    J Optoelectronics and Advanced Materials 9 (11),(2007), pp. 3549-3552

28. Pavlova P, Angelova E,

    Colorimetrical Problems in Colour Identification of Objects in Computer Images,

    Proc Workshop COST'529 WG4 Colour Aspects for Light Sources-Colorimetry and Its Applications in Industry and Environment (2006 Varna, Bulgaria) pp 41-5.

29. Dreischuh T N, Gurdev L L, Stoyanov D V, Protochristov C N, Vankov O I,

    On the efficiency of a lidar-type single-sided gamma-ray tomography approach,

    AIP Conf Proc 2007;889:778.

30. Iliev I, Grigorieva V, Kolev N, Evgenieva Ts, Kaprielov B, Kolev I,

    Lidar, radiometer and ozonemeter measurements over urban area,

    AIP Conf Proc 2007;899:735.

31. Borisova D, Nikolov H, Danov M, Tsanev V,

    Comparison between reflectance/emittance spectra of iron-containing minerals,

    Proc 3rd Int Conf Recent advances in space technologies (2007 Istanbul, Turkey), pp 252-5.

32. Danov M, Tsanev V, Petkov D,

    Investigation of thermal infrared emissivity spectra of mineral and rock samples,

    Proc 26^th Symp of the European Association of Remote Sensing Laboratories New developments and challenges in remote sensing (2006 Warsaw, Poland) pp 145-52.

33. D. Stoyanov, L. Gurdev, T. Dreischuh, O.Vankov, Ch. Protochristov,

    Radar on single spontaneously emitted gamma-photons,

    Patent Reg. № 108818/ 23.07.2004.

34. D. Stoyanov, L. Gurdev, T. Dreischuh,O.Vankov, L.Avramov, E.Borissova,

    Optical multichannel transceiving system,

    Patent Reg. № 109799/17.01.2007.

35. D. Stoyanov, L. Gurdev, T. Dreischuh, O.Vankov, L.Avramov, E. Borissova, I. Bliznakova,

    Patent Ref: 2007P24470EP in Siemens, MD, AG.

Top

    

2006

1. Kolev N, Grigorov I, Kolev I, Devara PCS, Raj PE, Dani KK,

   Lidar and sunphotometer observations of atmospheric boundary-layer characteristics over an urban area,

   Boundary Layer Meteorology, DOI 10.1007/s10546-006-9131-z, 2006.

2. Pencheva V, Penchev S, Naboko V, Donchev T, Kolev S, Kutzarova T,

   Laser heterodyne measurement of photothermal displacement for material surface characterization,

   Plasma Processes and Polymers 2006;3/2:253-256.

3. Kolev S, Grigorieva V,

   Surface and total ozone over Bulgaria,

   NATO Sci Series IV: Earth and Environmental Sci, Springer, 2006;62:351-358.

4. Pencneva V, Penchev S, Naboko V,

   Laser systems for photothermal non-destructive analysis of materials,

   News Bulletin of the Bulgarian Academy of Sciences, 2006;7/35:3-4

5. Kolarov GV, Grigorov IV,

   Lidar studies of graviti mountain waves over Vitosha mountain,

   Proc 23^rd Int Laser Radar Conf, July 2006, Nara, Japan, pp 881-882.

6. Kolev N, Devara P, Iliev I, Evgenieva T, Kaprielov B, Kolev I,

   Lidar, sunphotometer and spectroradiometer measurements of the atmospheric aerosol optical characteristics,

   Proc 23^rd Int Laser Radar Conf, July 2006, Nara, Japan, pp 761-764.

7. Naboko S, Pavlov L, Naboko V, Penchev S, Pencheva V, Nenkova E, Penchev A,

   Atmospheric absorption spectroscopy lidar employing digital signal processing and neural network,

   Proc Nat Cof Elektronika, June 2006, Sofia, Bulgaria, pp 254-257.

8. Pencheva V, Naboko V, Penchev S, Donchev T, Penchev A, Nenkova E,

   Optical reflectance modulation method for HTS films characterization,

   Proc Nat Cof Elektronika, June 2006, Sofia, Bulgaria, pp 63-67.

9. Pencheva V, Naboko V, Penchev S, Zabov P, Donchev T,

   High-resolution non-destructive laser control of opaque materials,

   Proc 6^th Int Conf Solid-State Chemistry and Modern Micro- and Nano-Technol, September 2006, Kislovodsk, Russia, pp. 316-319.

10. Dreischuh TN, Gurdev LL, Stoyanov DV, Protochristov CN, Vankov OI,

    On the efficiency of a lidar-type single-sided gamma-ray tomography approach,

    6^th Balkan Phys Union Congress, August 2006, Istanbul, Turkey, Book of Abstracts p 1071.

11. Iliev I, Grigorieva V, Kolev N, Evgenieva T, Kaprielov B, Kolev I,

    Lidar, radiometer and ozonemeter measurements over urban area,

    6^th Balkan Phys Union Congress, August 2006, Istanbul, Turkey, Book of Abstracts p 997.

12. Kolev I, Grigorieva V, Kolev N, Savov P, Tatarov B, Kaprielov B,

    Тwo case - studies of boundary layer development effect on the ground level ozone concentration over an urban area,

    Proc 23^rd Int Laser Radar Conf, July 2006, Nara, Japan, pp 757-760.

Top

    

2005

1. Kolev I, Tatarov B, Savov PI, Trifonov T, Kaprielov B,

   Experimental study of polarization characteristics of lidar signal in case occlusion front,

   Int J Remote sensing 2005;26/1:29-46.

2. Kolev N, Tatarov B, Grigorieva V, Donev E, Simeonov P, Umlensky V, Kaprielov B, Kolev I,

   Aerosol lidar and in situ ozone observations in PBL over Bulgaria during solar eclipse on 11 August 1999,

   Int J Remote Sensing 2005:26/16:3567-3585.

3. Tatarov B, Sugimoto N

   Estimation of quartz concentration in the tropospheric mineral aerosols using combined Raman and high–spectral–resolution lidars,

   Opt Lett,2005;30;3407-3409

4. Grigorieva V, Polischuk V,

   Peculiarities of the durnal vriations of srface oone in the Pamir muntains,

   Int J Remote Sensing 2005;26:3507-3513.

5. Gurdev L, Dreischuh T,

   Modeling coherent Doppler lidar sensing of turbulent atmosphere,

   Proc SPIE 2005;5830:332-336.

6. Masheva AF, Grigorov V, Stoyanov D,

   Novel lidar acquisition & processing method, insensitive to photon overlapping at detection of fast, highly dynamic backscattered signals,

   Proc SPIE 2005;5830:327-331.

7. Kolev N, Tatarov B, Grigorieva V, Donev E, Kaprielov B, Kolev I,

   Solar eclipse: Lidar, meteorological and ozone measurements in the PBL over Bulgaria,

   Proc SPIE 2005;5830: 337 - 341.

8. Григоров И, Коларов Г, Стоянов Д,

   Лазерно сондиране на атмосферата за европейската лидарна мрежа,

   Месечен информационен бюлетин за наука и технологии Новости–БАН, 2005;7/23:3-4, ISSN 1312-2436.

9. Григоров И, Коларов Г,.Стоянов Д,

   Измервания на атмосферните параметри с български аерозолен лидар,

   Списание на БАН 2005;5:49-53.

10. Atutov SN, Biancalana V, Burchianti A, Calabrese R, Corradi L, Dainelli A, Guidi V, Khanbekyan A, Marinelli C, Mariotti E, Minguzzi P, Moi L, Peshev Z, Sanguinetti S, Stancari G, Tomassetti L, Veronesi S,

    Laser Cooling and Trapping of Francium,

    Laser Physics 2005;15:1080-1086.

11. Kolarov G, Grigorov I,

    Lidar rgistration of orographic internal gravity waves in the atmosphere,

    Proc ICEST'2005, Serbia and Montenegro, June 2005, pp 755-756.

12. Набоко С, Павлов Л, Набоко В, Пенчев С, Пенчева В,

    Драйвер мощного лазерного диода для работы в импульсном режиме,

    Сборник докладов Первой международной научно-технической конференции Ставропол СевКавДТУ 2005,стр. 297-302.

13. Mitev V, Deleva A, Peshev Z, Grigorov IV,

    Video camera measurements of turbulence using a laser spot images,

    Proc 4^th Int Symp Laser Technol and Lasers, October 2005, Plovdiv, Bulgaria, pp 211-214.

14. Deleva A, Peshev Z, Grigorov I, Mitev V, Avramov L,

    Development of a RAMAN lidar for determination of molecular constituents of the troposphere,

    Proc 4^th Int Symp Laser Technol and Lasers, October 2005, Plovdiv, Bulgaria, pp 207-210.

Top

    

2004

1. Atutov SN, Biancalana V, Burchianti A, Calabrese R, Corradi L, Dainelli A, Guidi V, Khanbekyan A, Marinelli C, Mariotti E, Minguzzi P, Moi L, Peshev Z, Sanguinetti S, Stancari G, Tomassetti L, Veronesi S,

   Laser Cooling and Trapping of Francium,

   Proc 4^th Int Symp Modern Problems of Laser Physics, Novosibirsk, Russia, August 2004, Bogayev SN, Pokasov PV (Eds), pp 284-296.

2. Stoyanov D, Dreischuh T, Vankov O, Gurdev L,

   Measuring the shape of randomly arriving pulses shorter than the acquisition step,

   Meas Sci Technol 2004;15: 2361-2369.

3. Kolev N Tatarov B, Kaprielov B, Kolev I,

   Investigation of the aerosol structure over an urban area using a polarization lidar,

   J Enviroment Monitoring 2004;19:834-840.

4. Bockmann C,... Grigorov I,at all.

   Aerosol lidar intercomparisons in the frame of EARLINET: Part II - aerosol backscatter algorithms,

   Appl Optics 2004;43:977-989.

5. Pencheva V, Penchev S, Naboko V, Naboko S, Donchev T,

   Application of modulated optical reflectance method for high-temeperature superconducting film characterization,

   Vacuum 2004;76/2-3:253-256.

6. Kolev I, Tatarov B, Savov P, Trifonov T, Kaprielov B,

   Experimental Study of Polarization Characteristics of Lidar Signal in case Occlusion front,

   Int J Remote Sensing 2004;26/1:29-46.

7. Zhechev D, Parvanova N, Grigorieva V,

   Ar⁺–Cd Sputtering-atomizing and coherent-galvanic effects in hollow cathode discharge,

   Vacuum 2004;76/2-3:401-404.

8. Masheva A, Stoyanov D,

   Retrieving of the photon statistics and optical time profiles in lidar remote sensing by novel method for highly dynamic photon stream measurements,

   in Meetings in Physics pp 24-28, Heron Press 2004, Sofia, Bulgaria.

9. Grigorov I, Kolarov G, Kaprielov B, Tatarov B, Stoyanov D,

   Intercomperison of the Two Earlnet Lidars in Sofia,

   Proc 22^nd Int Laser Radar Conf, Matera, Italy, July 2004, pp 911-913.

10. Kolev N, Grigorieva V, Umlensky V, Tatarov B, Kaprielov B, Kolev I,

    Lidar and ground ozone measurements in the PBL during the August 11, 1999 Solar eclipse,

    Proc 22^nd Int Laser Radar Conf, Matera, Italy, July 2004, pp 789-792.

11. Kolev I, Tatarov B, Kaprielov B,

    Lidar Polarization Study of Clouds in Case of Occlusion front,

    Proc 22^nd Int Laser Radar Conf, Matera, Italy, July 2004, pp 407 410.

12. Papayannis A, Stoyanov D,

    Saharan Dust Outbreaks towards Europe: 3 Years of Systematic Observations by the European Lidar Network in the Frame of the EARLINET Project (2000-2003),

    Proc 22^nd Int Laser Radar Conf, Matera, Italy, July 2004, pp 845-848.

13. D. Stoyanov, L. Gurdev, T. Dreischuh, Ch. Protochristov,

    Radar on single, spontaneously emitted gamma-photons,

    PATENT: Reg. No 108818/ 23.07.2004.

Top

    

2003

1. Gurdev L, Dreischuh T,

   High range resolution velocity estimation techniques taking into account the frequency chirp in coherent Doppler lidars,

   Optics Comm 2003;219:101-116.

2. Stoyanov DV, Masheva AF, Vankov OI, Kolarov GV,

   Multipulse time of flight technique of variable resolution based on linear processing of count pulses,

   Nucl Instr Meth: Phys Res A 2003;515:760-770.

3. Skakalova T, Savov P, Grigorov I, Kolev I,

   Lidar observations of the sea-land breeze structure during the transition period at the southern Bulgarian Black Sea coast,

   Atm. Environment 2003;37:299-311.

4. Peshev ZY, Deleva AD,

   Self-seeded Ti:sapphire laser with an active feedback mirror,

   J Modern Optics 2003;50/14: 2243-2249.

5. Grigorieva V, Gogosheva Ts,

   Ground ozone behavior during the solar eclipse in Bulgaria on August 11, 1999,

   Comptes Rendus of Russian Academy Sciences, Ocean and Atmospheric Physics, 2003;39/1:47-50. (in Russian).

6. Grigorieva V, Mihalev M,

   Ground ozone in South-West Europe: city of Sofia, Bulgaria,

   Comptes Rendus of Russian Academy Sciences, Ocean and Atmospheric Physics, 39/1:51-55.

7. Dreischuh TN, Gurdev LL, Stoyanov DV,31. Dreischuh TN, Gurdev LL, Stoyanov DV,

   Optimum coherent-lidar-data-based retrieving of high-resolution Doppler velocity profiles,

   Balkan Phys Lett, Special Issue BPU 2003;4:59-62.

8. Gurdev LL, Dreischuh TN,

   A heuristic view on the signal-to-noise ratio at coherent heterodyne detection of aerosol lidar returns formed through turbulent atmosphere,

   Proc SPIE 2003;5226:310-314.

9. Gurdev LL, Dreischuh TN,

   On the determination by coherent lidar of Doppler-velocity profiles in turbulent atmosphere,

   Proc SPIE 2003;5226:300-304.

10. Dreischuh TN, Stoyanov DV, Vankov O, Kolarov GV,

    High precision laser range measurements using convolution and deconvolution of reflected pulses,

    Proc SPIE 2003;5226:305-309.

11. Masheva AF, Kolarov GV, Vankov OI, Stoyanov DV,

    Retrieving the optical time profiles with variable resolutions using linear processing of intensive photocount streams,

    Proc SPIE 2003;5226:260-264.

12. Kolev N, Tatarov B, Kaprielov B, Tzanev V, Kolev I,

    Use of statistical and polarization characteristics of lidar signals in investigations of PBL,

    Proc SPIE 2003;5226:270-274.

13. Tatarov B, Kolev N, Kaprielov B, Kolev I,

    Lidar observation of planetary boundary layer clouds,

    Proc SPIE 2003;5226:265-269.

14. V.Grigorieva, M. Mihalev,

    The possible uncertainties of quality of the surface ozone data,

    Proc SPIE 2003;5226:285-289.

15. Penchev S, Naboko S, Naboko V, Pencheva V, Donchev T, Pavlov L, Simeonov P,

    DIAL monitoring of atmospheric climate-determining gases employing high-power pulsed laser diodes,

    Proc SPIE 2003;5226:290-294.

16. Naboko S, Pavlov L, Penchev S, Naboko V, Pencheva V, Donchev T,

    Digital signal processing and data acquisition employing diode lasers for lidar- hygrometer,

    Proc SPIE 2003;5226:295-299.

17. Naboko S, Pavlov L, Penchev S, Naboko V, Pencheva V,

    Digital signal processing and data acquisition employing diode lasers for lidar hygrometer,

    Proc Meeting in Physics at University of Sofia, January 2003, Proykova A (Ed), Heron Press, Sofia, 2003;4: 68-70.

18. Kolarov G, Grigorov I, Stoyanov D,

    Lidar Measurements over the City of Sofia,

    Proc 38^th Int Conf Information, Communication and Energy Systems and Technologies, October 2003, Technical University of Sofia, Bulgaria, pp 413-414.

19. Kolev N, Tatarov B, Kaprielov B, Kolev I,

    Investigation of aerosol structure over urban area by polarization lidar,

    Proc 6^th Int Symp Tropospheric Profiling: Needs and Technologies.

20. Tatarov B, Kolev N, Kaprielov B, Tsanev V, I. Kolev I,

    Cloud observations by lidar and IR radiometer,

    Proc 6^th Int Symp Tropospheric profiling: needs and echnologies.

Top

    

2002

1. L. L. Gurdev, T. N. Dreischuh, and D. V. Stoyanov,

   High range resolution velocity estimation techniques for coherent Doppler lidars with exponentially-shaped laser pulses ,

   Appl. Opt. 2002, 41, pp. 1741-1749.

2. A.D. Deleva, Z.Y. Peshev,

   Two-wavelength self-seeded pulsed tunable laser ,

   Appl. Phys. B 2002, 74, pp. 229-232.

3. P. Savov, T. Skakalova, I. Kolev, Fr. Ludwig,

   Lidar investigation of the temporal and spatial distribution of atmospheric aerosols in mountain valleys ,

   J. of Appl. Meteorology 2002, 41, pp. 528-541.

4. A.F. Masheva, G.V. Kolarov, O.I. Vankov, D.V. Stoyanov,

   Optical profiling of variable resolution by novel time of flight technique ,

   Proc. 21 Int. Laser Radar Conference, 1, pp. 129-132, July 2002, Quebec City, Canada.

5. V. Grigorieva, M. Mikhalev, S. Kolev,

   Ozone and related species concentrations at two Bulgarian sites , EUROTRAC-2 project,

   Annual Report 2000 on Tropospheric Ozone Research, pp. 81-85.

6. V. Pencheva, V. Naboko, S. Penchev, S. Naboko, T. Donchev,

   Implementation of DIAL- hygrometer employing powerful pulsed diode lasers and DSP data acquisition ,

   Proc. Int. Symp. on Laser Technologies and Lasers LTL'2001, pp. 207-211, 2001, Smolyan, Bulgaria.

7. N. Kolev, B. Tatarov, V. Tsanev,

   Method for lidar determination of the cloud bottom height ,

   Proc. 9^th Nat. Conf. Basic problems of the Solar-Terrestrial Influences , pp. 141-144, November 2002, Sofia, Bulgaria.

8. B. Tatarov, N. Kolev, T. Trophonov, I. Kolev,

   Lidar observation of PBL height during the Solar Eclipse on 11.08.1999

   Proc. Colloquim on physics for men and environment protection, pp.25-30, July 2001, Giuletchiza, Bulgaria.

9. Ts. Mitsev, E. Ferdinandov, G. Kolarov and I. Grigorov,

   Laser radar system for control of aerosol pollution from a power plant ,

   Proc. 37^th International Scientific Conference ICEST, pp. 699-700, October 2002, Nish, Yugoslavia.

10. Grigorieva V, Kolev S,

    Spring-Time Peculiarities in Ozone Behaviour at the Bulgarian Site,

    Proc EUROTRAC-2 Symp 2002, Garmisch-Partenkirchen, Germany, Midgley P (Ed), Margraf Verlagm Weikersheim 2002 (4 pages, available on CD).

11. Grigorieva V, Kolev S, Gogosheva T, Petkov B, Bogdanov S, Videnov P,

    Surface and Total Ozone Over Bulgaria During Solar Eclipse,

    Proc EUROTRAC-2 Symp 2002, Garmisch-Partenkirchen, Germany, Midgley P (Ed), Margraf Verlagm Weikersheim 2002 (4 pages, available on CD).

12. Penchev S, Pencheva V, Naboko N,

    Method and device for ampliffication of the radiation of pulsed diode lasers,

    PATENT: No. 61465, Institute of Electronics, BAS.

Top

    

2001

1. V.A. Mitev,

   Remote Sensing Technique for Turbulence Measurements Using a Laser Spot Saturated Images ,

   Canadian Journal of Remote Sensing, 27, 5, (2001), 537 - 541.

2. L. Gurdev, T. Dreischuh, D. Stoyanov,

   High-resolution Doppler- velocity estimation techniques for processing of coherent heterodyne pulsed lidar data,

   JOSA A, 18, (2001), pp. 134-142.

3. D. Stoyanov, I. Mechev, V. Naboko.

   Precise ranging by emitting long laser pulses,

   Review of Scientific Instr., 72, 11, (2001), pp. 4279-4286.

4. T. Dreischuh, L. Gurdev, D. Stoyanov,

   Retrieving high-resolution Doppler velocity profiles in 10.6 um and 2 um coherent lidars,

   Proc. SPIE, 4397, (2001), pp. 481-485.

5. G. Kolarov, L. Gurdev, I. Grigorov, A. Deleva,

   Limitationof the lidar angular resolution caused by the atmospheric turbulence and the lidar telescope aberrations,

   Proc. SPIE, 4397, (2001), pp. 501-505.

6. E. Alipieva, E. Taskova, L. Gurdev, T. Dreischuh,

   Investigation and analysis of nonlinear Hanle effect in He I,

   Proc. SPIE, 4397, (2001), pp. 161-165.

7. T.S. Skakalova, P.B. Savov, E.G. Topuzova, I.V. Grigorov,

   Aerosol extinction distribution during the morning transition of breeze circulation observed by lidar,

   Proc. SPIE, 4397, (2001), pp. 461-465.

8. P. Savov, T. Skakalova, B. Kaprielov, I. Kolev,

   Lidar study of the convective planetary boundary layer over urban area ,

   Proc. SPIE, 4397, (2001), pp. 466-471.

9. B. Tatarov, T. Trifonov, B. Kaprielov, I. Kolev,

   Statistical approach to analysis of lidar signals in case of multiple scattering,

   Proc. SPIE, 4397, (2001), pp. 486-490.

10. B. Tatarov, N. Kolev, Tr. Trifonov, E. Angelova, I. Genkova, I. Kolev, V. Tsanev,

    Lidar - IR radiometric cloud observation LIRADEX'98-Winter,

    Proc. SPIE, 4397, (2001), pp. 471-475.

11. V. Grigorieva, S. Kolev, M. Mikhalev,

    Ozone Air-Pollution over Balkan Peninsule ,

    Bulgarian Journal of Physics, 27, (2000), pp. 72-75.

12. V. Grigorieva,

    Tropospheric Ozone Research, EUROTRAC-2 project,

    Annual Report 1999, pp. 81-84, ISS, Munich, 2001.

13. V. Grigorieva, M. Mikhalev,

    Effect of Solar Eclips on surface ozone concentration ,

    Proc. 7^th Nat. Conf. Modern problems of Solar-Earth interactions , May, 2000, Sofia, Bulgaria, pp. 91-94.

14. S. Penchev, S. Naboko, V. Pencheva, V. Naboko,

    PATENT: Method & Device for remote atmospheric monitoring by powerful diode lasers of wide emission spectra.

    

    

    

ONGOING RESEARCH PROJECTS:

    

Financed by the Bulgarian National Science Fund

• DО О2-112/2008 National Center for Biomedical Photonics (in the optical tomography part).
• DО- 224/2008 Novel magnetic and magnetoelectrical materials for the next generation electronic components.
• DO 02-107/2009 Improving the resolution of Thomson scattering lidars by application of novel deconvolution-based algorithms.
• Ph-1511 Lidar methods for high resolution probing of inhomogeneous objects by optical and gamma radiation.
• ES YS -1502/05 Investigation of emission and reflectance characteristics of mixed spectral classes of rocks and minerals.
• ТS-1523/05 Effects of atmospheric turbulences on the parameters of: laser communication systems in open media; lidar and radiometric systems for ecomonitoring; systems for analysis of optical images of natural (incl. space) objects.

    

Financed by the BAS

• Raman lidar by Nd:YAG laser for remote sensing of atmospheric parameters.
• Remote determination of some statistical characteristics of non-uniform media by image processing.
• Lidar methods for determination of planetary boundary layer heights.
• Laser sensing of tissue-like turbid optical media for localizing of characteristic inhomogeneities inside.
• Lidar monitoring of atmospheric gaseous components by powerful pulsed diode lasers.
• Ozone variations in the low atmosphere on different temporal scales.
• Lidar diagnostics of thermonuclear plasma by Thomson scattering relativistic spectra.

    

European projects

• European Aerosol Research Lidar Network: Advanced Sustainable Observation System, EARLINET-ASOS, FP6, 2006-2011. Contract No. 025991.
• Improving the resolution of Thomson scattering lidars by application of novel deconvolution-based algorithms, Contract of Association between the European Atomic Energy Community (EURATOM) and INRNE under 7th Framework Program of the European Atomic Energy Community (Euratom) No. FU07-CT-2007-00059.
• Aerosols and Clouds. Long-term data base from space-borne lidar Measurements. CALIPSO Program, European Space Agency (ESA).

    

COLLABORATIONS:

1. Optical remote sensing studies of the atmospheric boundary layer characteristics using laser radar
   Institute of Tropical Meteorology, Pune, India (in the framework of the Indo-Bulgarian inter-governmental program of cooperation in science & technology),
   Grant No INT/Bulgaria.
2. Optical, gamma and MW remote characterization of dynamic small-size submicron structured systems in life-sciences and industry,
   University of Liege, Belgium.
3. Advanced lidar technologies for tropospheric aerosol studies
   Istituto di Metodologie per l'Analisi Ambientale, CNR, Italy
4. Lidar investigation of aerosol fields transformations in urban industrial zones,
   Institute of Physics, National Academy of Belarus, Minsk, Belarus.

    

    

    

    

IMPROVING THE RESOLUTION OF THOMSON SCATTERING LIDARS BY APPLICATION OF NOVEL DECONVOLUTION - BASED ALGORITHMS Project in the frame of 7th Framework Programme of the European Atomic Energy Community (EURATOM).No. FU07-CT-2007-00059 Download as .PDF     Version in Bulgarian Download as .PDF
Project EARLINET-ASOS, EUROPEAN AEROSOL RESEARCH LIDAR NETWORK - ADVANCED SUSTANABLE OBSERVATION SYSTEM Download as .PDF     Version in Bulgarian Download as .PDF