SSI banner home page FASPEC SET simulations FLAASH active sensing


SSI Personnel:

Steven Adler-Golden - Alexander Berk - Lawrence Bernstein - Matthew Braunstein - Jason Cline - Timothy Deschenes - Hoang Dothe - Rainer Dressler - Marsha Fox - Jonathan Gelbord - Neil Goldstein - Jonathan Grot - Nevzat Guler - Michael (Misha) Kogan - Leon Muratov - Raphael Panfili - Timothy Perkins - Jason Quenneville - Steven Richtsmeier - Robert Shroll - Benjamin St. Peter - Robert Sundberg - Bridget Tannian - Ramona Taylor - Pajo Vujkovic-Cvijin

SSI Consultants:

James Duff - John Gruninger - Xuemin Jin - Rosemary Kennett - Jamine Lee - Robert Levine - David Robertson

SSI personnel

Dr. Steven M. Adler-Golden

Ph.D. (Physical Chemistry) Cornell University, 1979
M.S. (Physical Chemistry) Cornell University, 1976
B.S. (Chemistry) Yale University, 1974

Dr. Adler-Golden is a Principal Scientist and serves as a Senior Technical Fellow at Spectral Sciences, Inc. He has been involved at both the management and technical levels on a variety of theoretical and experimental projects. His research activities and interests include atmospheric aeronomy and infrared radiation modeling, molecular spectroscopy, and detection and measurement of trace gases and contaminants. His experience in instrument development at SSI includes work on UV and IR techniques for humidity sensing, laser Raman sensors for hydrogen gas, and diode laser applications.

Dr. Alexander Berk

Ph.D. (Physical Chemistry) University of North Carolina, 1983
B.S. (Chemistry/Mathematics) Harvey Mudd College, 1978

Dr. Berk is currently a Principal Scientist at Spectral Sciences, Inc. His research activities have concentrated on the modeling of atmospheric transmittance and radiance phenomena. This work has included development of modules for Air Force Research Laboratory's MODTRAN, SHARC, and SAMM radiation codes, calculation of infrared and ultraviolet radiation signatures from high and moderate altitude rocket fuel dumps, modeling of cloud clutter radiation in the MWIR and LWIR, and development of a high temperature band model data tape for the SIRRM. Dr. Berk has also led efforts to model Shuttle water venting, to model the response of terrain temperature to changes in cloud cover, and to model temperature and moisture profiles in the turbulent surface layer.

Dr. Lawrence S. Bernstein

Ph.D. (Physical Chemistry) University of California, Berkeley, 1974
B.S. (Chemistry) University of Delaware, 1971

Dr. Bernstein is a co-founder of Spectral Sciences, Inc., and serves as its Chief Scientist. He has managed and participated at the technical level in many experimental, prototype development, and theoretical projects. He managed the development of a prototype Infrared Moisture Monitor for detection of water leaks in the helium loops of a High Temperature Gas Reactor and a prototype hydrogen chloride sensor for monitoring the environmental impact of Space Shuttle and other solid propellant rocket launches on the surrounding communities. He is the lead developer of QUAC, the QUick Atmospheric Correction code, a very fast, empirical atmospheric correction code for hyperspectral or multispectral imagery that uses only in-scene information. His theoretical work includes development of the Standard Plume Ultraviolet Radiation Code (SPURC) and upgrades to the Composite High Altitude Radiation Model (CHARM) for the Air Force Astronautics Laboratory.

Dr. Matthew Braunstein

Postdoctoral Fellowship, Los Alamos National Laboratory, 1992
Ph.D. (Chemistry) California Institute of Technology, 1990
B.A. (Chemistry) Wesleyan University, 1985

Dr. Braunstein joined Spectral Sciences, Inc. (SSI) in 1998, became a Group Leader, and is now a Senior Technical Fellow. He is a principal investigator for projects simulating chemically reacting flows, radiation transport, and spectral signatures. These projects focus on modeling high-energy molecular collisions and energy transfer under non-equilibrium conditions. They involve development and application of numerical methods in computational chemistry, chemical dynamics, direct simulation Monte Carlo (DSMC), spectroscopy, and other chemical physics disciplines. Before coming to SSI, Dr. Braunstein led efforts in signal processing for high-resolution radar imaging at MIT Lincoln Laboratory and at the Institute for Defense Analyses. As a post-doctoral fellow at Los Alamos National Laboratory, he investigated the spectroscopy of ozone through development and application of quantum mechanical models. Dr. Braunstein received a Ph.D. in Chemistry from the California Institute of Technology in 1990 for theoretical work on the photoionization dynamics of molecules.

Dr. Jason A. Cline

Ph.D. (Chemical Engineering), Massachusetts Institute of Technology, 2000
M.S. (Chemical Engineering Practice), Massachusetts Institute of Technology, 1997
B.S. (Chemical Engineering), Drexel University, 1994

Dr. Cline is a Principal Scientist who joined SSI in February 2002. His graduate work examined corrosion rates and mechanisms in supercritical water oxidation (SCWO) systems using experiments and ab initio calculations. His postdoctoral work at Argonne National Laboratory focused on experimental determination of radiation-induced chemical reactions in supercritical water. His interests and experience include high performance computing, various forms of atomistic modeling, reaction kinetics measurements, radiation chemistry, corrosion phenomena, and supercritical fluids.

Dr. Timothy R. Deschenes

Ph.D. (Aerospace Engineering) University of Michigan, 2011
M.S. (Aerospace Engineering) University of Michigan, 2008
B.S. (Aeronautical and Mechanical Engineering) Clarkson University, 2006

Dr. Deschenes joined Spectral Sciences, Inc. in July 2011 as a Senior Scientist. His graduate work focused on the extension of the Modular-Particle Continuum (MPC) method for simulation of partially rarefied, external flow around hypersonic vehicles. This hybrid method was able to reproduce flow results of a high fidelity rarefied flow description while requiring only a fraction of the computational time and memory. His research focuses on the extension of computational modeling efforts through an increase in the physical fidelity of models and expansion of the computational capabilities. His interests and experience include simulation and modeling of continuum and rarefied gas flows, high temperature gas dynamics, and high performance computing.

Dr. Hoang Dothe

Ph.D. (Physical Chemistry) The Johns Hopkins University, 1987
B.A. (Chemistry) Bridgewater College, 1980

Dr. Dothe is currently a Principal Scientist who joined SSI in September 1998. Prior to joining SSI he was in charge of maintenance, testing, and upgrading of upper atmospheric optical modeling codes (SHARC and SAMM) for the Air Force Research Laboratory. His experience there included atmospheric chemical modeling, data-model comparisons, and the development and implementation of state-to-state molecular kinetics models for non-LTE conditions. As part of the non-LTE kinetics model development he performed quantum scattering calculations and developed the Distorted Wave Impulse Approach for atom-diatom collisions.

Dr. Rainer Dressler

Ph.D. (Physical Chemistry), University of Fribourg, Switzerland, 1984
Diploma (Chemistry) , University of Fribourg, Switzerland, 1981

Dr. Dressler joined Spectral Sciences, Incorporated (SSI) in February of 2008 as a Principal Scientist. Prior to joining SSI, he spent 20 years as a task scientist at the Air Force Research Laboratory at Hanscom Air Force Base, Massachusetts. He was the group leader of the Space Chemistry task that investigated a broad range of chemical dynamics associated with space flight. During those years, he gained expertise in fundamental hyperthermal chemical reaction dynamics, molecular spectroscopy, ion chemistry and mass spectrometric sensing, the space environment, the phenomenology of spacecraft interactions and contamination, spacecraft optical signatures, and electric propulsion. Dr. Dressler was also the principal investigator of the Maui Analysis of Upper-Atmospheric Injections (MAUI) space experiment. His current interests at SSI relate to signature exploitation for improved monitoring of the ever increasing traffic in space, and the application of computational chemical tools to elucidate complex chemical dynamics. Dr. Dressler is a Fellow of the American Association for the Advancement of Science and the American Physical Society.

Dr. James W. Duff

Ph.D. (Physical Chemistry) University of Minnesota, 1975
B.S. (Chemistry) Wayne State University, 1968

Dr. Duff is currently a Principal Scientist at Spectral Sciences, Inc. His research activities have included the modeling of atmospheric clustering phenomena, the calculation of infrared and ultraviolet radiation signatures from high altitude rocket plumes, investigation of energy transfer and reactive processes occurring in quiescent and auroral atmospheres, and the modeling of radiation transport phenomena in rain, snow, and clouds. His most recent interests have included nucleation and chemistry involved in the release of liquids in the atmosphere, the chemistry of the lower thermosphere irradiated by an intense electron beam, and the development of a first principles infrared model to predict the background radiance and spatial structure in the mesosphere and thermosphere.

Dr. Marsha J. Fox

Ph.D. (Optical Sciences) University of Arizona, 1993
B.S. (Physics) Rensselaer Polytechnic Institute, 1983

Dr. Fox joined SSI as a Principal Scientist in January 1999. She is Vice President of Operations, responsible for overseeing corporate activities, organizing commercialization endeavors, and staffing science and engineering positions. She also maintains a scientist role in a number of projects. Her technical areas include development of imaging and spectroscopic sensor technologies and remote sensing data analysis techniques. Since joining SSI, Dr. Fox has investigated and developed techniques to enable retrieval of ground surface characteristics and to detect and identify gaseous chemicals in the intervening atmosphere. She has contributed to models of laser interactions with missile plumes and detection of liquid chemical contaminant films on surfaces. Prior to joining SSI, Dr Fox was a Senior Research Physicist at the Air Force Research (AFRL) Laboratory Directed Energy directorate, located at Kirtland AFB, NM. At AFRL, she held several technical positions, including technical lead for the multi-organizational Laser Remote Optical Sensing program, principal experimenter for the Speckle Imaging Group and lead scientist for development of PHIAT, a low-noise sensor for speckle imaging on the Air Maui Optical Station Compensated Imaging System telescope.

Dr. Jonathan M. Gelbord

Ph.D. (Physics and Astronomy) Johns Hopkins University, 2002
M.A. (Physics and Astronomy) Johns Hopkins University, 1998
B.A. (Astronomy) Yale University, 1994

Dr. Gelbord is currently a Senior Scientist at Spectral Sciences, Inc. His research activities include modeling of atmospheric transmittance and the spectral signatures of molecules in hot, shocked, and non-equilibrium gases, as well as time series analyses of multiwavelength astronomical data. Before joining SSI in 2014, Dr. Gelbord was a faculty member at Penn State University where he served on the science operations team of the Swift Explorer Mission, an astronomical satellite that observes in the X-ray, ultraviolet and optical bands. Previously, Dr. Gelbord held postdoctoral positions at the Massachusetts Institute of Technology and Durham University. In each of these positions he analyzed imaging and spectroscopic data, combining measurements from a diverse range of wavebands (from radio through X-rays) to put new constraints on the processes and structures related to accretion onto the supermassive black holes at the centers of active galaxies.

Dr. Neil Goldstein

Ph.D. (Physical Chemistry) University of Massachusetts, 1980
B.S. (Chemistry) Antioch College, 1976

Dr. Goldstein is a Principal Scientist and serves as a Senior Technical Fellow at SSI. He has played a leading role in developing several automated spectroscopic sensors from the conceptual stage through prototype testing and technology transfer. Current projects include dispersive sensors for imaging combustor temperature and concentration fields, measuring quality of pipeline gas, and airborne remote sensing. He is also involved in the development of optical sensors based on diode-laser absorption, Raman scattering, interferometry, and non-dispersive IR absorption. Previous projects have included kinetic investigations of ion-molecule reactions and the development of chemical-specific sensors using IR, visible, and UV spectroscopic probes.

Jonathan Grot

M.S. (Physics) Rutgers, The State University of New Jersey, 1996
B.S. (Engineering Physics) University of Illinois, Champaign-Urbana, 1991

Mr. Grot joined Spectral Sciences, Inc. in February 2001 as a Senior Scientist subsequent to employment with Osram Sylvania, Inc. in Danvers, MA. His graduate research work primarily concentrated on tunneling behavior of electrons through super-fluid helium. He also worked on development of innovative techniques of teaching physics to students with little scientific background. His work at Sylvania was research and development of the ICETRON fluorescent system which utilizes an electrodeless, closed-path, vessel and high-frequency, electromagnetic induction. He also specialized in the design, construction, and automation of spectroradiometric/electronic test and measurement systems and high-vacuum, precision-pressure-regulated, exhaust systems unique to the company and needed for the further development of inductively coupled fluorescent systems. His scholastic background and research interests include high-temperature superconductivity, electromagnetic radiation, image and signal processing, and high-performance computing.

Dr. John H. Gruninger

Ph.D. (Theoretical Chemistry) University of Pennsylvania, 1967
B.S. (Chemistry) University of Pennsylvania, 1962

Dr. Gruninger joined Spectral Sciences, Inc. in 1988 as a Principal Scientist. His present research interests include pattern recognition techniques with applications in remote sensing and spectroscopy. He is investigating image synthesis techniques for the generation of spectral, temporal spatial three dimensional scenes with emphasis on applications in target detection and recognition. Dr. Gruninger is also pursuing the use of texture models for the generation of structured background scenes. Dr. Gruninger is also continuing interests in algorithm and model development for adaptive associative memories.

Dr. Nevzat Guler

Ph.D. (Nuclear Physics) Old Dominion University, 2009
M.S. (Physics) University of Texas at Arlington, 2001
B.S. (Physics) Middle East Technical University, 1998

Dr. Guler joined Spectral Sciences as a Senior Scientist in March 2014. His current research interests include hyperspectral imaging and remote sensing. When he was a postdoctoral research associate at Los Alamos National Laboratory (2010-2014), he worked on imaging and interpretation of the neutron emission from inertial confinement fusion (ICF) experiments at the National Ignition Facility (NIF). He contributed to the nuclear diagnostic efforts on the ICF implosions in order to better understand the thermo-nuclear ignition process and provide feedback to improve the capsule design. He also worked on the development of a short pulse laser generated neutron source and its applications, especially performing the first neutron radiography, source size measurements as well as contributing to the first nondestructive assay (NDA) applications of this new kind of neutron source. Dr. Guler also worked on various experiments at Jefferson Lab (2002-2009) and Brookhaven National Lab (2000-2002), mainly focusing on the spin structure of the nucleon. He performed and analyzed double polarized electron-nucleon (and nucleon-nucleon) scattering experiments to measure the spin dependent asymmetries that reveal the internal spin structure of the nucleon. He also worked on modelling the nucleon spin asymmetries (both for proton and neutron) using the available world data.

Dr. Xuemin Jin

Ph.D. (Physics) University of Maryland, 1993
M.S. (Physics) China Institute of Atomic Energy, 1985
B.S. (Theoretical Physics) Shanxi University, 1982

Dr. Jin is a former employee of Spectral Sciences, Inc. and now works as a consultant for the company. He has worked on variety of research projects DoD, NSF, and NGA. His research interests include active combustion control systems based on optical-sensing using emission tomography, tomographic spatial profiling of turbine engines, tomographic-based, laser radar, target tracking and ID for UAVs, and Monte Carlo-based high-Z scattering compensation in nondestructive testing. From 1994-1996 Dr. Jin was a postdoctoral research associate at Canada's national laboratory for particle and nuclear physics (TRIUMF) in Vancouver where he worked on analytical models for strongly interacting multi-nucleon systems. From 1996-1999, he was a senior postdoctoral research associate at the Center for Theoretical Physics, Massachusetts Institute of Technology where he worked on fundamental spin structures of nucleon. From 1999-2000, he was a scientist with SerOptics, Inc. in Woburn, MA, working on laser induced intrinsic molecular fluorescence images and spectra of blood samples. From 2000-2002 he was a development support engineer with eXcelon Corp. in Burlington, MA, working on object-oriented database products.

Dr. Rosemary G. Kennett

Master of Advanced Study in Mathematics, University of Cambridge, 2011
Ph.D. (Physics) California Institute of Technology, 1980
M.S. (Applied Mathematics) California Institute of Technology, 1979
M.S. (Physics) California Institute of Technology, 1977
B.Sc. (Mathematics) University of Nottingham, 1972

Dr. Kennett is a former employee of Spectral Sciences, Inc. and now works as a consultant for the company. She has worked on the development of object-oriented software for the integration of atmospheric and radiative transfer codes such as MODTRAN and SAMM. She received an MDA Phase I award for the Star Background Model and was also PI on an MDA project that uses codes, including the SOCRATES Direct Simulation Monte Carlo code, to model chemically reactive molecular flows in the upper atmosphere. Other research interests include studies of the optical signatures from debris clouds and liquid propellant venting.

Michael (Misha) Kogan

B.S. (Electrical Engineering) Northeastern University, 2010

Mr. Kogan joined Spectral Sciences, Inc. in October 2010 as a Research Engineer. He interned at SSI in 2009 and worked primarily in the lab on both electrical and mechanical components of multiple flame analysis experiments. Since then he has been involved in both software and hardware development of multiple instruments in the Sensor Applications Laboratory that are primarily used for combustion analysis. His interests include electronic hardware, circuit board design, and mechanical design.

Dr. Jamine Lee

Ph.D. (Physics) Colorado State University, Fort Collins, 1982
M.S. (Physics) Colorado State University, Fort Collins, 1979
B.S. (Physics) Soochow University, Taipei, Taiwan, 1976

Dr. Lee is a former employee of Spectral Sciences, Inc. and now works as a consultant for the company. His research activities have been centered on optical instrumentation and techniques for gas sensing using laser absorption spectroscopy, Raman scattering, and IR gas correlation spectroscopy. He participated in many of SSI's sensor development projects, and had a major technical role in the development of SSI's DiRTiGAS diode-laser based gas monitors.

Dr. Robert Y. Levine

Ph.D. (Physics) University of Michigan, 1983
M.S.E.E. (Optics) Tufts University, 1980
B.S. (Physics) Michigan State University, 1976

Dr. Levine is a former employee of Spectral Sciences, Inc. and now works as a consultant for the company. He is the principal investigator for developing software for radiotherapy planning, and a research investigator on near-IR imaging of tissues. These projects continue work done at MIT Lincoln Laboratory, where Dr. Levine was a scientist since 1985. He was the principal investigator on algorithms to design intensity modulated beams for the optimum conformation of radiation to solid mass tumors in collaboration with the University of Massachusetts Medical Center. The algorithms are now being enhanced at SSI and incorporated into a prototype commercial radiotherapy planning tool. Dr. Levine was the principal investigator in the development of near-IR contrast agents and associated discrimination algorithms for multispectral imaging of breast cancer. This work, which is continuing to prototype stage at SSI, was the basis for the 1997 BF Goodrich Award and an MIT patent application. In addition to his biomedical work, Dr. Levine's research experience includes microchannel plate development for high-speed optical signal modulation, multi-sensor neural net data fusion, satellite motion analysis from X-band radar images, laser radar imaging, and ultra-wideband radar imaging.

Dr. Leonid S. Muratov

Ph.D. (Physics) Washington State University, 1994
M.S. (Physics) Novosibirsk State University, 1984

Dr. Muratov is currently a Principal Scientist at Spectral Sciences, Inc. Prior to joining SSI his research was focused on ab initio and ab initio-based methods of modeling defects in metals and semiconductors. His current research interests include modeling of radiative transfer in the atmosphere and high performance computing.

Dr. Raphael Panfili

Ph.D. (Physics) University of Rochester, 2002
M.A. (Physics) University of Rochester, 1998
B.A. (Physics, Astronomy) Vassar College, 1996

Dr. Panfili joined Spectral Sciences, Inc. in 2002 and is currently a Principal Scientist. His research activities include the modeling of high-energy molecular collisions, as well as the development of atmospheric radiance and transmittance algorithms for both lower and upper atmospheric conditions. Prior to joining SSI, Dr. Panfili's graduate research involved classical and quantum mechanical modeling of the behavior of correlated electrons in the presence of intense femtosecond laser pulses.

Timothy Perkins

M.Eng. (Electrical and Computer Engineering) University of Louisville SSS, 2000
B.S. (Electrical Engineering) University of Louisville SSS, 1999

Mr. Perkins is currently a Principal Scientist at Spectral Sciences, Inc. His graduate research work primarily concentrated on computer vision and image processing techniques, with application to remote sensing data analysis. This work includes algorithm development for classification of high-dimensional spectral image data, and data fusion techniques using multiple remote sensors. His research background and interests include image and signal processing, pattern recognition, computer vision, computational neural networks, fuzzy logic, and parallel computing.

Dr. Jason Quenneville

Ph.D. (Chemistry) University of Illinois, Urbana-Champaign, 2003
B. S. (Chemistry) University of Massachusetts, Amherst, 1996

Dr. Quenneville joined Spectral Sciences as a Senior Scientist in July 2008. His prior research includes theoretical work on gas, liquid, solid and protein systems. As a National Security Postdoctoral Fellow at Los Alamos National Laboratory, he studied high explosives initiation and shock induced damage in metals, and began development of a theoretical method for condensed phase quantum control using direct dynamics. During an earlier postdoctoral appointment at UC-Davis, Dr. Quenneville used a combined DFT/classical electrostatics approach to help propose a new mechanism for proton pumping in the respiratory enzyme, cytochrome c oxidase. His graduate work involved the use of multi-state direct quantum dynamics to investigate organic photochemistry in the gas phase.

Dr. Steven C. Richtsmeier

Ph.D. (Physical Chemistry) University of Minnesota, 1983
B.A. (Chemistry) Gustavus Adolphus College, 1977

Dr. Richtsmeier is a Principal Scientist at Spectral Sciences, Inc., having joined the staff in 1985. He is currently the technical leader for development of MCScene, a first-principles Monte Carlo hyperspectral imagery simulation code. He also has extensive experience in the development of spectral sensors and in the planning, execution, and data analysis of field measurements involving the collection of spectral imagery. Other research activities have included development of instrumentation for measurement of trace pollutant gases, and modeling and analysis of infrared, visible, and ultraviolet signatures of aircraft and rockets.

Dr. David C. Robertson

Ph.D. (Theoretical Physics) University of California, Santa Barbara, 1970
M.S. (Physics) University of California, Santa Barbara, 1968
B.S. (Physics) Stanford University, 1966

Dr. Robertson is a co-founder of Spectral Sciences, Inc. He has retired from full-time employment, and now works as a consultant for the company. His research interests include both low and high altitude atmospheric radiance, infrared signatures of aircraft and rockets, and other applications of radiation transport in the atmosphere. He helped develop the SSTIRS Code for calculating target contrast signatures as seen by a remote observer or sensor. He was the program manager for developing new modules for the SPIRITS aircraft image code and validating them by comparisons to data; under this effort, numerous upgrades to SPIRITS-AC2 and a module for the C-17A were developed. He is a co-developer of the Sandford-Robertson bidirectional reflectance model used in SSTIRS, SPIRITS, and GTSIGS. He has applied Monte Carlo and spectrally-varying two-stream models to the calculation of cloud radiances for application to sensor problems. Dr. Robertson also helped develop the MODTRAN and MOSART atmospheric codes for the USAF which are the successors to LOWTRAN 7, and served as the program manager for development of SHARC, the Strategic High-Altitude Radiance Code for non-LTE conditions.

Dr. Robert M. Shroll

Ph.D. (Theoretical Chemistry), University of Idaho, 1997
B.S. (Chemistry), Eastern Washington University, 1991

Dr. Shroll is a Principal Scientist who joined SSI in August 2002. His previous research activities have been in the areas of condensed phase classical molecular simulations, molecular energy transfer dynamics, and electronic structure theory. He has developed new methods and models for performing classical simulations as applied to biological and geological systems. His studies of energy transfer were applied to the Non-Local Thermodynamic Equilibrium problem in atmospheric gasses using the techniques of quantum scattering to determine vibrational relaxation rate constants. He has also investigated theoretical electronic excited state energy gradients for use in excited state dynamics. He is now working in several areas including chemical dynamics, atmospheric compensation, and hyperspectral imaging.

Benjamin St. Peter

M.S. (Electrical Engineering) The University of Massachusetts, Amherst, 2012
B.S. (Electrical Engineering) The University of Maine, Orono, 2003

Mr. St. Peter joined Spectral Sciences, Inc. in November 2012 as an Instrumentation Research Engineer. He previously worked at the Microwave Remote Sensing Laboratory (MIRSL) and the THz Laboratory, both at the University of Massachusetts, where his specialties were microwave radiometry and medical imaging at terahertz frequencies. He also worked as an RF Engineer for AT&T, and as an Application Developer for Ericsson. His research interests include hyperspectral imaging, wavefront optics, and vision correction.

Dr. Robert L. Sundberg

Ph.D. (Physical Chemistry) University of California, 1983
B.A. (Chemistry) Colby College, 1978

Dr. Sundberg is President of Spectral Sciences, Inc. In addition to corporate management, he has been active in research involving the development of hyperspectral target detection and identification algorithms, spectral and temporal scene simulation, rapid real-time IR target imaging models, high temperature optical models for reentry vehicle ablation products, high resolution line-by-line radiation transport models for calculating non-equilibrium infrared vacuum core plume radiation, and modeling of atmospheric infrared radiance phenomena.

Dr. Bridget Tannian

Ph.D. (Electrical Engineering) Rice University, 2001
M.S. (Electrical Engineering) Rice University, 1998
B.S. (Physics) Massachusetts Institute of Technology, 1994

Dr. Tannian joined Spectral Sciences as a Senior Scientist in April 2014. She previously led algorithm development for a family of portable x-ray fluorescence spectrometers at Olympus NDT and Innov-X Systems. Her graduate work in atomic physics focused on experimental explorations of the border between classical and quantum mechanical dynamics in Rydberg atom systems.

Dr. Ramona S. Taylor

Ph.D. (Physical Chemistry), The Pennsylvania State University, 1994
B.S. (Chemistry), Lebanon Valley College, 1988

Dr. Taylor is currently a Principal Scientist with Spectral Sciences, Inc. Since joining SSI in June 2004, she has led efforts ranging from the development of physics-based models to predict the reactivity of chemical warfare agents with silica and titania, to the development of a combined physics-based/engineering-level model for the ejection of fuel debris ejected from solid rocket motors and the corresponding optical and radar signatures of the ejected debris. In addition, Dr. Taylor has experience using the SOCRATES-P Direct Simulation Monte Carlo code to model the interactions of rocket plumes with the atmosphere. Over her career, Dr. Taylor has worked hand-in-hand with experimentalists, with the latest example of this being the development of techniques to remotely detect chemical and biological warfare agents via fluorescent taggants. Prior to joining SSI, Dr. Taylor's research efforts concentrated on using statistical and quantum mechanical methods to understand the reactivity and dynamics of heterogeneous interfaces. Her research efforts prior to joining SSI utilized classical mechanics simulations along with transition state theory to examine the process of mass accommodation of gas phase molecules by aqueous aerosols. Dr. Taylor's interest in atmospheric aerosols began with her postdoctoral fellowship in the Molecular Theory and Modeling group at the Pacific Northwest National Laboratories (1994-1997) and continued while she was on faculty at the College of the Holy Cross (1997-2004). Her graduate research focused on understanding the chemistry that occurs both at the solid/solid and at the gas/solid interface. Specifically, she examined the high energy particle bombardment of organic films on metal and carbon surfaces by argon beams.

Dr. Pajo Vujkovic-Cvijin

Ph.D. (Physics) University of Belgrade, Yugoslavia, 1985
M.S. (Electrical Engineering) University of Belgrade, Yugoslavia, 1980

Dr. Vujkovic-Cvijin joined Spectral Sciences, Inc. as a Principal Scientist in November 2003. He previously worked as an independent consultant serving government research organizations and private companies (US Army, Battelle Memorial Institute, Science and Technology Corporation of Hampton, VA), was the chief scientist of Photonic Microsystems of Cupertino, CA, senior research physicist with SRI International in Menlo Park, CA, and Associate Research Professor both at the University of Arizona in Tucson, and at the University of Belgrade, Yugoslavia. His current research interests include active and passive optical remote sensing, applied laser spectroscopy, and advanced instrumentation development. Previous interests included nonlinear optical sources for laser spectroscopy, frequency stabilization of lasers, novel LIDAR systems, and fiber telecommunication devices.