SSI Personnel:

Prabhat Acharya - Steven Adler-Golden - Alexander Berk - Lawrence Bernstein  - Matthew Braunstein  - Jason Cline  - Frank Clark - Patrick Conforti - Timothy Deschenes - Hoang Dothe - Rainer Dressler - James Duff - Marsha Fox - Jonathan Gelbord - Neil Goldstein - Jonathan Grot - John Gruninger - Chona Guiang - Nevzat Guler - Fred Hawes - Xuemin Jin -Michael (Misha) Kogan - Robert Levine - Leon Muratov - Raphael Panfili - Timothy Perkins - Jason  Quenneville - Steven Richtsmeier - Robert Shroll - Benjamin St. Peter - Robert Sundberg - Ramona Taylor - Bridget Tannian - Pajo Vujkovic-Cvijin

SSI Consultants:

Jamine Lee - Rosemary Kennett - David Robertson


Dr. Prabhat K. Acharya

Ph.D. (Chemical Physics) University of North Carolina, 1982
M.S. (Computer Science) University of Utah, 1987
B.S. (Physics/Chemistry) University of North Carolina at Greensboro, 1977

Dr. Acharya is currently a Principal Scientist at Spectral Sciences, Inc. His research activities include modeling of atmospheric transmittance and radiance phenomena, signal processing and digital image segmentation. He has performed various upgrades to the MODTRAN atmospheric radiation code and validation against field data. Dr. Acharya's postdoctoral work involved calculation of rates and propensity rules for electron auto-detachment of vibrationally excited molecules; his publications with Prof. J. Simons were some of the first papers to quantitatively explain this phenomenon.


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 currently a Principal Scientist 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 and leader of the Atmospheric Compensation Group 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 SAM 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. His theoretical work includes development of the Standard Plume Ultraviolet Radiation Code (SPURC) for the Air Force Astronautics Laboratory 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, Incorporated (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. Frank O. Clark

NRC Postdoctoral Fellow, NIST, Gaithersburg, MD 1975
Ph.D. (Astronomy) University of Virginia 1973
M.S. (Astronomy) University of Virginia 1971
B.S. (Physics) Augusta College 1969

Dr. Clark joined SSI in 2011 as a Principal Scientist. Dr. Clark was an employee of the Air Force Research Laboratory (AFRL) for 22 years, invented and patented the HyperTemporal Imaging technique and has applied for a patent on a new method of passive remote sensing. He has previously developed astronomy models for the Air Force (Celestial Background Scene Descriptor), the PLEXUS artificial intelligence front end to the AFRL atmospheric and celestial models, worked on infrared calibration stars, and has done extensive research on the interstellar medium using microwave spectroscopy and infrared satellites. Dr. Clark was Principal Investigator for the HyperTemporal Imaging program at AFRL. Prior to AFRL, Dr. Clark spent two years at the Laboratory for Space Research, Groningen, Netherlands, and was at the University of Kentucky for 14 years where he reached a Full Professor. Dr. Clark did postdoctoral work as an NRC fellow at NIST in microwave spectroscopy. He is a member of the American Astronomical Society and a Fellow of the AFRL.


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. Patrick Conforti

Ph.D. (Chemistry) Pennsylvania State University, 2008
B.S. (Chemistry) University of Notre Dame, 2003

Dr. Conforti is a Principal Scientist and the Passive Sensing Group Leader at Spectral Sciences, Inc., where he has been involved at both technical and management levels on a wide variety software and scientific programs. Dr. Conforti joined Spectral Sciences, Inc. as a Senior Scientist in June 2008 after completing his Ph.D. at Pennsylvania State University. At Spectral Sciences, he is involved in the development of hyperspectral imaging processing techniques including atmospheric compensation as well as target detection algorithms. In particular, he has been involved in thermal infrared image processing and the effort to modernize MODTRAN. His other research activities at SSI focus on condensed and gas phase molecular dynamics simulations, calculations of potential energy surfaces, and determining the dynamics of chemical reactions and energy transfer processes following collisions. Prior to SSI, Dr. Conforti's graduate work involved focused on modeling photochemical and photothermal ablation of polymer surfaces. This work includes development and application of a mixed Monte-Carlo – molecular dynamics algorithm to elucidate the synergistic effects between chemical and thermal processes with atomic scale detail and their influence on the ablation process in material surfaces. Dr. Conforti’s interests also include computer science and parallel computing having obtained a Ph.D. minor in high performance computing.


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

Postdoctoral Fellowship, Joint Institute for Laboratory Astrophysics, University of Colorado, 1984
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 is a  Principal Scientist and serves as SSI's Vice President for Operations.  Her specialties include development of imaging and spectroscopic sensor technologies and remote sensing data analysis techniques. As a senior research physicist at the AFRL Directed Energy directorate, Dr. Fox was the technical leader of the Laser Remote Optical Sensing program for four years, heading a team of scientists and engineers to develop high sensitivity, laser-based sensors for chemical plume identification. Previously, Dr. Fox was the lead scientist for PHIAT, an AFRL project to develop and implement a low-noise CCD imaging sensor designed to enhance atmospherically degraded satellite imagery collected on the 1.6m telescope at the Air Force Maui Optical Site (AMOS). As principal experimenter for the Speckle Imaging Group from1988-1992, Dr. Fox teamed with Steward Observatory researchers to conduct speckle imaging field experiments.


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 heads the instrument development group 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 (HPC).


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. Chona Guiang

Ph.D. (Chemistry) University of Texas, 1999
M.S. (Chemistry) University of Texas, 1996
B.S. (Chemistry) University of the Philippines, 1992

Dr. Guiang joined Spectral Sciences as a Senior Scientist in September, 2007. Her graduate work in chemical physics involved quantum dynamics applied to performing coherent control in a condensed phase environment. She was a computational scientist and researcher prior to joining SSI, and has performed performance modeling and analysis of scientific applications in advanced computing platforms. Her main research interests include the use of quantum and classical mechanics in molecular modeling, as well as the application of high performance computing towards atomistic simulations.


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 the 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. Fred Hawes

Ph.D. (Theoretical Nuclear Physics), Florida State University, 1994.
M.S. (Electrical Engineering), Rice University, 1977
B.A. (Electrical Engineering and German), Rice University, 1975

Dr. Hawes joined Spectral Sciences, Inc. as a Senior Scientist in October, 2001. He is currently working on analysis of atmospheric effects in MSX Satellite data. His most recent postdoctoral research was in computational models of ultraviolet absorption in the Schumann-Runge bands of oxygen. His Ph.D. research and earlier postdoctoral positions were in computational hadron physics. Before attending graduate school he worked as a member of the technical staff at the Jet Propulsion Laboratory, developing real-time microprocessor software for Shuttle flight experiments and teleoperator applications.


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, a Principal Scientist, joined Spectral Sciences in October, 2002. He has been working on variety of research projects from DoD, NSF, and NGA. His current 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 in Cambridge where he worked on fundamental spin structures of nucleon. From 1999-2000, he was a scientist with SerOptics, Inc. in Woburn Massachusetts 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 Massachusetts 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 joined Spectral Sciences, Inc as a Senior Scientist in July, 2002. She works at Spectral Sciences, Inc. on the development of object-oriented software for the integration of atmospheric and radiative transfer codes such as Modtran and SAMM. She recently received an MDA Phase I award for the Star Background Model and has also been 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, including 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 the company 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 under 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 currently a Principal Scientist at Spectral Sciences, Inc. His present research activities are centered on optical instrumentation and techniques for gas sensing using laser absorption spectroscopy, Raman scattering, and IR gas correlation spectroscopy. He has participated in many of SSI's sensor development projects, and has 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, 1990
B.S. (Physics) Michigan State University, 1976

Dr. Levine joined SSI as a Principal Scientist in February 1998. 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 radiatitive transfer in 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 Spectral Sciences, Inc., 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 Principal Scientist and co-founder of Spectral Sciences, Inc. His present research activities include both low and high altitude atmospheric radiance, infrared signatures of aircraft and rockets, and other applications of radiation transport in the atmosphere. He has helped develop the SSTIRS Code for calculating target contrast signatures as seen by a remote observer or sensor. He is currently program manager for developing new modules for the SPIRITS aircraft image code and validating them by comparisons to data; under this ongoing effort numerous upgrades to SPIRITS-AC2 and a module for the C-17A have been 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 at 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 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.