Sciences and Exploration Directorate

Alexander P Vasilkov

(SR STAFF SCEINTIST)

Alexander P Vasilkov's Contact Card & Information.
Email: alexandre.p.vassilkov@nasa.gov
Org Code: 614
Address:
NASA/GSFC
Mail Code 614
Greenbelt, MD 20771
Employer: SCIENCE SYSTEMS AND APPLICATIONS INC

Positions/Employment


Lead Research Scientist

Science Systems and Applications, Inc. - 10210 Greenbelt Rd., Suite 600 Lanham, MD 20706

December 2000 - Present

Development and implementation of the Ozone Monitoring Instrument (OMI) cloud pressure algorithm based on Raman scattering in the UV. Analysis and validation of the cloud products derived from OMI measurements. Research in support of understanding the differences between cloud pressures derived with different methods. Radiative transfer modeling with rotational Raman scattering in cloudy/aerosol atmospheres. Proposal writing.

Education


Colleges: Moscow Institute of Physics and Technology (MIPT), a Russian equivalent of Massachusetts Institute of Technology

1972-1975 PhD student
1965-1971 Undergraduate and graduate student, Department of Aerophysics and Space Research.

Degrees:

1975 Ph.D. in Physics and Mathematics from MIPT.
1971 Master in Aerospace Engineering from MIPT, diploma with honors.

 

Publications


Refereed

2023. "Use of machine learning and principal component analysis to retrieve nitrogen dioxide (NO2) with hyperspectral imagers and reduce noise in spectral fitting." Atmospheric Measurement Techniques 16 (2): 481-500 [10.5194/amt-16-481-2023] [Journal Article/Letter]

2022. "Estimates of Hyperspectral Surface and Underwater UV Planar and Scalar Irradiances from OMI Measurements and Radiative Transfer Computations." Remote Sensing 14 (9): 2278 [10.3390/rs14092278] [Journal Article/Letter]

2022. "Using Machine Learning for Timely Estimates of Ocean Color Information From Hyperspectral Satellite Measurements in the Presence of Clouds, Aerosols, and Sunglint." Frontiers in Remote Sensing 3 [10.3389/frsen.2022.846174] [Journal Article/Letter]

2022. "Numerical Results for Polarized Light Scattering in a Spherical Atmosphere." Journal of Quantitative Spectroscopy and Radiative Transfer 287 108194 [10.1016/j.jqsrt.2022.108194] [Journal Article/Letter]

2022. "Use of Hyper-Spectral Visible and Near-Infrared Satellite Data for Timely Estimates of the Earth’s Surface Reflectance in Cloudy and Aerosol Loaded Conditions: Part 1–Application to RGB Image Restoration Over Land With GOME-2." Frontiers in Remote Sensing 2 [10.3389/frsen.2021.716430] [Journal Article/Letter]

2021. "Tracking aerosols and SO2 clouds from the Raikoke eruption: 3D view from satellite observations." Atmospheric Measurement Techniques 14 (12): 7545-7563 [10.5194/amt-14-7545-2021] [Journal Article/Letter]

2021. "Earth Imaging From the Surface of the Moon With a DSCOVR/EPIC-Type Camera." Frontiers in Remote Sensing 2 [10.3389/frsen.2021.724074] [Journal Article/Letter]

2021. "Explicit and consistent aerosol correction for visible wavelength satellite cloud and nitrogen dioxide retrievals based on optical properties from a global aerosol analysis." Atmospheric Measurement Techniques 14 (4): 2857-2871 [10.5194/amt-14-2857-2021] [Journal Article/Letter]

2021. "Detection of anomalies in the UV–vis reflectances from the Ozone Monitoring Instrument." Atmospheric Measurement Techniques 14 (2): 961-974 [10.5194/amt-14-961-2021] [Journal Article/Letter]

2021. "Ozone Monitoring Instrument (OMI) Aura nitrogen dioxide standard product version 4.0 with improved surface and cloud treatments." Atmospheric Measurement Techniques 14 455-479 [10.5194/amt-14-455-2021] [Journal Article/Letter]

2020. "Version 2 Ozone Monitoring Instrument SO2 product (OMSO2 V2): new anthropogenic SO2 vertical column density dataset." Atmospheric Measurement Techniques 13 (11): 6175-6191 [10.5194/amt-13-6175-2020] [Journal Article/Letter]

2020. "Revised and extended benchmark results for Rayleigh scattering of sunlight in spherical atmospheres." Journal of Quantitative Spectroscopy and Radiative Transfer 254 107181 [10.1016/j.jqsrt.2020.107181] [Journal Article/Letter]

2019. "A geometry-dependent surface Lambertian-equivalent reflectivity product for UV-Vis retrievals - Part 2: Evaluation over open ocean." Atmospheric Measurement Techniques 12 (12): 6749-6769 [10.5194/amt-12-6749-2019] [Journal Article/Letter]

2019. "UV Reflectance of the Ocean from DSCOVR/EPIC: Comparisons with a Theoretical Model and Aura/OMI Observations." Journal of Atmospheric and Oceanic Technology 36 (11): 2087-2099 [10.1175/jtech-d-18-0150.1] [Journal Article/Letter]

2019. "A geometry-dependent surface Lambertian-equivalent reflectivity product for UV–Vis retrievals – Part 1: Evaluation over land surfaces using measurements from OMI at 466nm." Atmospheric Measurement Techniques 12 (7): 3997-4017 [10.5194/amt-12-3997-2019] [Journal Article/Letter]

2019. "Cloud products from the Earth Polychromatic Imaging Camera (EPIC): algorithms and initial evaluation." Atmospheric Measurement Techniques 12 (3): 2019-2031 [10.5194/amt-12-2019-2019] [Journal Article/Letter]

2018. "A cloud algorithm based on the O2-O2 477 nm absorption band featuring an advanced spectral fitting method and the use of surface geometry-dependent Lambertian-equivalent reflectivity." Atmospheric Measurement Techniques 11 (7): 4093-4107 [10.5194/amt-11-4093-2018] [Journal Article/Letter]

2018. "A modified Friedmann equation for a system with varying gravitational mass." Monthly Notices of the Royal Astronomical Society 476 (1): 1384-1389 [10.1093/mnras/sty335] [Journal Article/Letter]

2017. "A cloud-ozone data product from Aura OMI and MLS satellite measurements." Atmospheric Measurement Techniques 10 (11): 4067-4078 [10.5194/amt-10-4067-2017] [Journal Article/Letter]

2017. "Accounting for the effects of surface BRDF on satellite cloud and trace-gas retrievals: a new approach based on geometry-dependent Lambertian equivalent reflectivity applied to OMI algorithms." Atmospheric Measurement Techniques 10 (1): 333-349 [10.5194/amt-10-333-2017] [Journal Article/Letter]

2016. "Smithsonian Astrophysical Observatory Ozone Mapping and Profiler Suite(SAO OMPS) formaldehyde retrieval." Atmospheric Measurement Techniques 9 (7): 2797-2812 [10.5194/amt-9-2797-2016] [Journal Article/Letter]

2016. "A repulsive force in the Einstein theory." Monthly Notices of the Royal Astronomical Society 461 (3): 2929-2933 [10.1093/mnras/stw1517] [Journal Article/Letter]

2016. "Top-of-the-atmosphere shortwave flux estimation from satellite observations: an empirical neural network approach applied with data from the A-train constellation." Atmospheric Measurement Techniques 9 (7): 2813-2826 [10.5194/amt-9-2813-2016] [Journal Article/Letter]

2014. "The seasonal cycle of satellite chlorophyll fluorescence observations and its relationship to vegetation phenology and ecosystem atmosphere carbon exchange." Remote Sensing of Environment 152 375-391 [10.1016/j.rse.2014.06.022] [Journal Article/Letter]

2014. "First estimates of global free-tropospheric NO2 abundances derived using a cloud-slicing technique applied to satellite observations from the Aura Ozone Monitoring Instrument (OMI)." Atmos. Chem. Phys. 14 (19): 10565-10588 [10.5194/acp-14-10565-2014] [Journal Article/Letter]

2014. "First results from a rotational Raman scattering cloud algorithm applied to the Suomi National Polar-orbiting Partnership (NPP) Ozone Mapping and Profiler Suite (OMPS) Nadir Mapper." Atmos. Meas. Tech. 7 2897-2906 [10.5194/amt-7-2897-2014] [Journal Article/Letter]

2013. "Note on rotational-Raman scattering in the O₂ A- and B-bands." Atmos. Meas. Tech. 6 (4): 981-990 [10.5194/amt-6-981-2013] [Journal Article/Letter]

2013. "Global monitoring of terrestrial chlorophyll fluorescence from moderate-spectral-resolution near-infrared satellite measurements: methodology, simulations, and application to GOME-2." Atmos. Meas. Tech. 6 (10): 2803-2823 [10.5194/amt-6-2803-2013] [Journal Article/Letter]

2012. "Fast simulators for satellite cloud optical centroid pressure retrievals; evaluation of OMI cloud retrievals." Atmospheric Measurement Techniques 5 (3): 529-545 [Full Text] [10.5194/amt-5-529-2012] [Journal Article/Letter]

2012. "Filling-in of near-infrared solar lines by terrestrial fluorescence and other geophysical effects: simulations and space-based observations from SCIAMACHY and GOSAT." Atmos Meas Tech 5 (4): 809-829 [10.5194/amt-5-809-2012] [Journal Article/Letter]

2011. "First observations of global and seasonal terrestrial chlorophyll fluorescence from space." Biogeosciences 8 (3): 637-651 [10.5194/bg-8-637-2011] [Journal Article/Letter]

2010. "Detection of multi-layer and vertically-extended clouds using A-train sensors." Atmos Meas Tech 3 (1): 233-247 [10.5194/amt-3-233-2010] [Journal Article/Letter]

2010. "What do satellite backscatter ultraviolet and visible spectrometers see over snow and ice? A study of clouds and ozone using the A-train." Atmos Meas Tech 3 (3): 619-629 [10.5194/amt-3-619-2010] [Journal Article/Letter]

2009. "Accurate satellite-derived estimates of the tropospheric ozone impact on the global radiation budget." Atmos. Chem. Phys. 9 (13): 4447-4465 [10.5194/acp-9-4447-2009] [Journal Article/Letter]

2009. "Ozone mixing ratios inside tropical deep convective clouds from OMI satellite measurements." Atmos Chem Phys 9 573-583 [Journal Article/Letter]

2009. "Impact of tropospheric nitrogen dioxide on the regional radiation budget." Atmos Chem Phys 9 6389-6400 [10.5194/acp-9-6389-2009] [Journal Article/Letter]

2008. "Discrete-ordinate radiative transfer in a stratified medium with first-order rotational Raman scattering." J of Qauntitative Spectroscopy and Radiative Transfer 109 (3): 404-425 [10.1016/j.jqsrt.2007.08.011] [Journal Article/Letter]

2008. "A new technique for retrieval of tropospheric and stratospheric ozone profiles using sky radiance measurements at multiple view angles: Application to a Brewer spectrometer." Journal of Geophysical Research – Atmospheres 113 (D6): D06304 [10.1029/2007JD009093] [Journal Article/Letter]

2008. "Evaluation of the OMI cloud pressures derived from rotational Raman scattering by comparisons with other satellite data and radiative transfer simulations." J. Geophys. Res. 113 (D15): D15S19 [10.1029/2007JD008689] [Journal Article/Letter]

2008. "Three-way comparison between OMI and PARASOL cloud pressure products." J. Geophys. Res. 113 (D15): D15S23 [10.1029/2007JD008694] [Journal Article/Letter]

2007. "High penetration of ultraviolet radiation in the south east Pacific waters." GeopHy Res Lett 34 L12610 [Journal Article/Letter]

2006. "First Results from the OMI Rotational Raman Scattering Cloud Pressure Algorithm." IEEE Trans on Geosc And Remote Sensing 44 (5): IGRSD2 1272-1282 [Journal Article/Letter]

2006. "Observations over hurricanes from the ozone monitoring instrument." Geophysical Research Letters 33 (6): L06807 [10.1029/2005GL025592] [Journal Article/Letter]

2005. "Assessment of the ultraviolet radiation field in ocean waters from space-based measurements and full radiative-transfer calculations." Appl Optics 44 (14): 2863-2869 [10.1364/AO.44.002863] [Journal Article/Letter]

2005. "Aerosol ultraviolet absorption experiment (2002 to 2004), part 2: absorption optical thickness, refractive index, and single scattering albedo." Opt Eng 44 (4): 041005-1 - 041005-17 [10.1117/1.1886819] [Journal Article/Letter]

2004. "Improving total column ozone retrievals using cloud pressures derived from Raman scattering in the UV." Geophys Res Lett 31 (L20109): [10.1029/2004GL020603] [Journal Article/Letter]

2004. "Use of SeaWiFS ocean color data to estimate neritic sediment mass transport from carbonate platforms for two hurricane-forced events." Coral Reefs 23 (1): 39-47 [10.1007/s00338-003-0355-9] [Journal Article/Letter]

2004. "Retrieval of cloud pressure and oceanic chlorophyll content using Raman scattering in GOME ultraviolet spectra." J Geophys Res 109 (D01109): [Journal Article/Letter]

2002. "Problems in assessment of the UV penetration into natural waters from space-based measurements." Optical Engineering 41 3019-3027 [Journal Article/Letter]

2002. "Ocean Raman scattering in satellite backscatter ultraviolet measurements." Geophys Res Lett 29 (17): 1837-1840 [10.1029/2002GL014955] [Journal Article/Letter]

2001. "Global mapping of underwater UV irradiances and DNA-weighted exposures using Total Ozone Mapping Spectrometer and Sea-viewing Wide Field-of-view Sensor data products." Journal of Geophysical Research: Oceans 106 (C11): 27205-27219 [10.1029/2000jc000373] [Journal Article/Letter]

2001. "Airborne polarized lidar detection of scattering layers in the ocean." Applied Optics 40 (24): 4353 [10.1364/ao.40.004353] [Journal Article/Letter]

2000. "Reduction of skylight reflection effects in the above-water measurement of diffuse marine reflectance: comment." Applied Optics 39 (9): 1379 [10.1364/ao.39.001379] [Journal Article/Letter]

1999. "The spectral reflectance and transparency of river plume waters." International Journal of Remote Sensing 20 (13): 2497-2508 [10.1080/014311699211895] [Journal Article/Letter]

1999. "Optical remote sensing in support of eutrophication monitoring in Belgian waters." Operational remote sensing for sustainable development 445-452 [Article in Book]

1999. "A model for calculation of ultraviolet radiation transfer in Arctic waters." Oceanology 39 (2): 172-180 [Journal Article/Letter]

1997. "Airborne lidar polarization estimation of the vertical profile of seawater light scattering coefficient." Izvestiya, Atmospheric and Oceanic Physics 33 (4): 519-524 [Journal Article/Letter]

1995. "Estimation of contrasts of oil slicks on the ocean surface measured in visible band of spectrum from space vehicles." Earth Obs. Rem. Sens. 13 419-430 [Journal Article/Letter]

1994. "Influence of river discharge on spatial-distribution of hydrological characteristics in the Kara Sea." Okeanologiya 34 (5): 652-661 [Journal Article/Letter]

1993. "The accuracy of biooptical parameters retrieval from the spectral sea reflectance." IRS '92: Current Problems in Atmospheric Radiation 421-424 [Article in Book]

1991. "Remote sensing of bioluminescence in the sea." Oceanology 31 (6): 736-739 [Journal Article/Letter]

1990. "Determination of sea surface reflectance from aircraft radiometry." Sov. J. Remote Sensing 6 (1): 63-71 [Journal Article/Letter]

1990. "Properties of the angular dependence of polarization for upward radiation from the sea surface in the visible region of the spectrum." Izvestiya, Atmospheric and Oceanic Physics 26 (5): 397-401 [Journal Article/Letter]

1990. "The effectiveness of polarisation measurements in passive remote sensing of the ocean in the visible region of the spectrum." Sov. J. Remote Sensing 7 (5): 886-899 [Journal Article/Letter]

1989. "A method of calculating the intensity of the backscattered signal in pulsed sounding of a stratified aqueous medium." Izvestiya, Atmospheric and Oceanic Physics 25 (1): 77-80 [Journal Article/Letter]

1989. "Airborne remote measurements of the spectral coefficient of sea brightness." Atmospheric Optics 2 (6): 527-532 [Journal Article/Letter]

1989. "Remote observation of internal waves from variations in the solar radiance scattered by the ocean." Sov. J. Remote Sensing 5 (5): 799-811 [Journal Article/Letter]

1988. "Polarization characteristics in the backscattering signal for pulsed sensing of the ocean by a narrow light beam." Izvestiya, Atmospheric and Oceanic Physics 24 (8): 635-642 [Journal Article/Letter]

1988. "Spectral Dependence of the Light Scattering of Organic Hydrosol." Izvestiya, Atmospheric and Oceanic Physics 24 968-972 [Journal Article/Letter]

1987. "Characteristics of internal waves in the upper thermocline near the Mascarene ridge." Oceanology 27 (2): 138-141 [Journal Article/Letter]

1985. "Retrieval of spectral optical properties of sea water from spectra of reflectance coefficient of the sea." Oceanology 25 (1): 3640 [Journal Article/Letter]

1982. "Diurnal variability of the vertical distribution of suspended particle and hydrooptical characteristics in the surface layer of the ocean." Oceanology 22 (3): 284-287 [Journal Article/Letter]

1982. "Reasons for the appearance of the maximum near 700 nm in the radiance spectrum emitted by the ocean layer." Oceanology 22 (6): 697-701 [Journal Article/Letter]

1979. "Tissue temperature simulation in cryosurgery." Journal of Engineering Physics 36 (6): 725-730 [10.1007/bf01086673] [Journal Article/Letter]

1978. "Fast interpolation scheme for calculating the transmission function of an inhomogeneous atmosphere." Akademiia Nauk SSSR, Izvestiia, Fizika Atmosfery i Okeana 14 1304-1307 [Journal Article/Letter]

1977. "Two-phase Couette flow." Fluid Dynamics 11 (3): 383-386 [10.1007/bf01014453] [Journal Article/Letter]

1977. "Calculation of a turbulent two-phase isobaric jet." Fluid Dynamics 11 (5): 699-704 [10.1007/bf01012960] [Journal Article/Letter]

1976. "Similarity with the outflow of strongly unexpanded jets into a hypersonic wake." Fluid Dynamics 9 (5): 792-798 [10.1007/bf01017428] [Journal Article/Letter]

1976. "Stagnation region of a blunt body in two-phase hypersonic flow." Fluid Dynamics 10 (5): 806-812 [10.1007/bf01015455] [Journal Article/Letter]

1975. "Outflow of gas from a severely underexpanded nozzle in opposition to a hypersonic flow." Fluid Dynamics 8 (3): 428-433 [10.1007/bf01019969] [Journal Article/Letter]

Non-Refereed

2003. "Seasonal variation of UV radiation in the ocean under clear and cloudy conditions." Proc. SPIE 5156, Ultraviolet Ground- and Space-based Measurements, Models, and Effects III 5156 63-73 [10.1117/12.505298] [Proceedings]

1999. "The distribution and dynamics of suspended particulate matter in Belgian coastal waters derived from AVHRR imagery." The Proceedings of the Conference on Satellite Meteorology and Oceanography, 9 th, Paris, France 626-629 [Proceedings]

1997. "A retrieval of coastal water constituent concentrations by least-squares inversion of a radiance model." Proceedings of the fourth international conference on remote sensing for marine and coastal environments. Technology and applications. II 107-116 [Proceedings]

1994. "Solar ultraviolet radiation penetration and photochemical effect on colored dissolved organic matter in coastal waters." Ocean Optics XII SPIE 2258 288-299 [10.1117/12.190072] [Proceedings]

1993. "Ultraviolet radiation in the atmosphere-ocean system: a model study." Atmospheric Radiation 2049 244-255 [10.1117/12.163517] [Proceedings]

1992. "Optimization of the polarization remote-sensing techniques of the ocean." Polarization and Remote Sensing SPIE 1747 188-199 [10.1117/12.138836] [Proceedings]