Haris Riris

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Haris Riris

  • AST, OPTICAL PHYSICS
  • 301.614.6736 | 301.614.6744
  • NASA/GSFC
  • Mail Code: 614
  • Greenbelt , MD 20771
  • Employer: NASA
  • Research Interests

    Optical Physicist, AST

    Diode Laser Systems and Spectroscopy,

    Trace Gas Detection and Laser Remote Sensing

    Laser Altimeters and Ranging Systems

    Ultra-sensitive and Frequency Modulation Spectroscopy

    Signal Processing

    Medical Diagnostics, DNA sequencing

    Semiconductor optical diagnostics

    Chem-Bio detection

    LIDAR

    Topographic and Trace Gas Lidars for Planetary and Earth Science applications.

    Tunable Laser Spectroscopy

    High sensitvity Tunable Laser Spectroscopy for Planetary and Earth science applications

    Signal Processing

    Signal processing algorithms for laser spectroscopy applications

    Brief Bio

    Haris Riris joined GSFC as contractor in 1999 to work on GLAS (ICEsat I).  He became a civil servant in 2005 in the Laser Remote Sensing Branch. Prior to GSFC he held positions at SRI International in Menlo Park, CA  and  semiconductor and bioetechnology companies in Silicon Valley.  His research interests include high sensitivity laser spectroscopy, laser remote sensing, laser altimetry, and trace gas detection applications to earth and planetray science.

    Current Projects

    Methane Sounder - using lasers to remotely measure Methane mixing ratios from aircraft and space.

    Active Sensing of CO2 Emissions over Nights, Days and Seasons

    MARLI: MARs LIdar for global climate measurements from orbit

    Advanced Limb Infrared Chemistry Experiment

    Improved Retrieval Algorithms for Trace Gas Lidars

    Mars Atmosphere Laser-Limb Sounder

    Planetary Exploration Science Technology Office (PESTO) and MATISSE Program Officer

    One year detail assignment at NASA HQ in the Planetary Exploration Science Technology Office (PESTO) and MATISSE Program Officer

    Positions/Employment

    9/1989 - 10/1997

    Senior Research Physicist

    SRI International, Menlo Park, CA
    11/1997 - 6/1998

    Staff Systems Engineer

    Molecular Dynamics, Sunnyvale, CA
    6/1998 - 8/1999

    Senior Systems Engineer

    KLA-Tencor, Milpitas, CA
    8/1999 - 2/2005

    Director, Systems Group

    Sigma Space, Greenbelt, MD
    2/2005 - Present

    Optical Physicist, AST

    NASA, Greenbelt, MD

    Teaching Experience

    Graduate teaching assistant 1984-1989

    Education

    1989 - Ph.D. (Physics) University of Virginia
    1984 - B.S. (Physics Magna Cum Laude, Phi Beta Kappa) Indiana University of Pennsylvania

    Professional Societies

    AGU, 2009 - Present
    OSA, 1989 - Present
    SPIE, 2006 - 2014
    AWMA, 1994 - 1997
    Secretary Signal Processing Committee

    Professional Service

    ICESat II Review Board (GSRT, SRB, BCE)

    GLAS Anomaly Review Board (GARB)

    GEDI BCE Review 

    JPSS/ATMS GSRT

    Awards

    CO2 Sounder Group Exceptional Achievment Award, (accepted from the center director on behalf of the team) for demonstrating the feasibility of the laser sounding technique and its potential for a future missions and advancing NASA’s goals in understanding climate change.
    ICESat Certificate of Recognition for contributions to GLAS/ICESat.
    NASA Group Achievement Honor Award for the GLAS Anomaly Review Board (GARB).
    LRO-LOLA Group Achievement Award for his contributions to the LOLA team and the LRO mission.
    MOLA-Earth Awards of Excellence/Outstanding Teamwork for the Earth laser ranging test demonstrating the first ever interplanetary laser ranging.
    SSED Peer award 2008, for going above and beyond his job-related duties and providing assistance to other members of the Division and adding to the knowledge base or prestige of the Division.
    Individual Performance Awards 2006-2018

    Special Experience

    Review Board Member for multiple space flight projects

    Airborne mission planning and execution

    Publications

    Refereed

    Riris, H., K. Numata, S. Wu, and M. Fahey. 2019. "The challenges of measuring methane from space with a LIDAR." CEAS Space Journal, 11 (4): 475-483 [10.1007/s12567-019-00274-8]

    Abshire, J. B., A. K. Ramanathan, H. Riris, et al. G. R. Allan, X. Sun, W. E. Hasselbrack, J. Mao, S. Wu, J. Chen, K. Numata, S. R. Kawa, M. Y. Yang, and J. DiGangi. 2018. "Airborne measurements of CO<sub>2</sub> column concentrations made with a pulsed IPDA lidar using a multiple-wavelength-locked laser and HgCdTe APD detector." Atmospheric Measurement Techniques, 11 (4): 2001-2025 [10.5194/amt-11-2001-2018]

    Nicely, J., T. Hanisco, and H. Riris. 2018. "Applicability of Neural Networks to Etalon Fringe Filtering in Laser Spectrometers." Journal of Quantitative Spectroscopy and Radiative Transfer, 211C: 115-122 [10.1016/j.jqsrt.2018.03.004]

    Mao, J., A. Ramanathan, J. B. Abshire, et al. S. R. Kawa, H. Riris, G. R. Allan, M. Rodriguez, W. E. Hasselbrack, X. Sun, K. Numata, J. Chen, Y. Choi, and M. Y. Yang. 2018. "Measurement of atmospheric CO<sub>2</sub> column concentrations to cloud tops with a pulsed multi-wavelength airborne lidar." Atmospheric Measurement Techniques, 11 (1): 127-140 [10.5194/amt-11-127-2018]

    Riris, H., M. Rodriguez, J. Mao, G. Allan, and J. Abshire. 2017. "Airborne demonstration of atmospheric oxygen optical depth measurements with an integrated path differential absorption lidar." Optics Express, 25 (23): 29307 [10.1364/oe.25.029307]

    Riris, H., K. Numata, S. Wu, et al. B. Gonzalez, M. Rodriguez, S. Scott, S. Kawa, and J. Mao. 2017. "Methane optical density measurements with an integrated path differential absorption lidar from an airborne platform." Journal of Applied Remote Sensing, 11 (03): 1 [10.1117/1.jrs.11.034001]

    Numata, K., S. Wu, and H. Riris. 2014. "Fast-switching methane lidar transmitter based on a seeded optical parametric oscillator." Applied Physics B: Lasers and Optics, 116: 959--966.

    Abshire, J. B., A. Ramanathan, H. Riris, et al. J. Mao, G. R. Allan, W. E. Hasselbrack, C. J. Weaver, and E. V. Browell. 2013. "Airborne Measurements of CO2 Column Concentration and Range Using a Pulsed Direct-Detection IPDA Lidar." Remote Sensing, 6 (1): 443-469 [10.3390/rs6010443]

    Ramanathan, A. K., J. Mao, G. R. Allan, et al. H. Riris, C. J. Weaver, W. E. Hasselbrack, E. V. Browell, and J. B. Abshire. 2013. "Spectroscopic measurements of a CO₂ absorption line in an open vertical path using an airborne lidar." Applied Physics Letters, 103 (21): 214102 [10.1063/1.4832616]

    Riris, H., M. Rodriguez, G. R. Allan, et al. W. Hasselbrack, J. Mao, M. Stephen, and J. Abshire. 2013. "Pulsed airborne lidar measurements of atmospheric optical depth using the Oxygen A-band at 765 nm." Applied optics, 52 (25): 6369--6382.

    Numata, K., H. Riris, S. Li, et al. S. Wu, S. R. Kawa, M. Krainak, and J. Abshire. 2012. "Ground demonstration of trace gas lidar based on optical parametric amplifier." Journal of Applied Remote Sensing, 6 (1): 063561 [10.1117/1.JRS.6.063561]

    Riris, H., K. Numata, S. X. Li, et al. S. T. Wu, A. K. Ramanathan, M. W. Dawsey, J. Mao, S. R. Kawa, and J. B. Abshire. 2012. "Airborne measurements of atmospheric methane column abundance made using a pulsed IPDA lidar." Applied Optics, 51 (34): 8296-8305 [10.1364/AO.51.008296]

    Wilson, E. L., M. F. Neveu, H. Riris, E. M. Georgieva, and W. S. Heaps. 2011. "A hollow-waveguide gas correlation radiometer for ultra-precise column measurements of formaldehyde on Mars." Measurement Science and Technology, 22 (8): 085902 [10.1088/0957-0233/22/8/085902]

    Abshire, J. B., H. Riris, G. R. Allan, et al. C. J. Weaver, J. Mao, X. Sun, W. E. Hasselbrack, S. R. Kawa, and S. Biraud. 2010. "Pulsed airborne lidar measurements of atmospheric CO2 column absorption." Tellus B: Chemical and Physical Meteorology, 62 (5): 770-783 [10.1111/j.1600-0889.2010.00502.x]

    Smith, D. E., M. T. Zuber, G. Jackson, et al. J. Cavanaugh, G. A. Neumann, H. Riris, X. Sun, R. S. Zellar, C. Coltharp, J. Connelly, R. Katz, I. Kleyner, P. M. Liiva, A. Matuszeski, E. Mazarico, J. L. Mcgarry, A. Nova-Gradac, M. Ott, C. Peters, L. A. Ramos-Izquierdo, L. Ramsey, D. D. Rowlands, S. Schmidt, V. S. Scott, G. Shaw, J. Swinski, M. H. Torrence, G. Unger, A. Yu, and T. W. Zagwodzki. 2010. "The Lunar Orbiter Laser Altimeter Investigation on the Lunar Reconnaissance Orbiter Mission." Space Science Reviews, 150 (1-4): 209-241.

    Ramos-Izquierdo, L., V. S. Scott, J. Connelly, et al. S. Schmidt, W. Mamakos, J. Guzek, C. Peters, P. Liiva, M. Rodriguez, J. Cavanaugh, and H. Riris. 2009. "Optical system design and integration of the Lunar Orbiter Laser Altimeter." Applied Optics, 48 (16): 3035 [10.1364/ao.48.003035]

    Stephen, M., M. Krainak, H. Riris, and G. R. Allan. 2007. "Narrowband, tunable, frequency-doubled, erbium-doped fiber-amplifed transmitter." Optics Letters, 32 (15): 2073--2075.

    Abshire, J. B., X. Sun, H. Riris, et al. J. M. Sirota, J. F. McGarry, S. Palm, D. Yi, and P. Liiva. 2005. "Geoscience Laser Altimeter System (GLAS) on the ICESat Mission: On-orbit measurement performance." Geophysical Research Letters, 32 (21): L21S02 [Full Text (Link)] [10.1029/2005GL024028]

    Abshire, J., Xiaoli Sun, H. Riris, et al. M. Sirota, J. McGarry, S. Palm, E. Ketchum, and R. Follas. 2004. "Geoscience laser altimeter system (GLAS) on the ICESat mission: pre-launch and on-orbit measurement performance." IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings, [10.1109/igarss.2003.1294166]

    Riris, H., C. B. Carlisle, R. E. Warren, et al. D. E. Cooper, R. Martinelli, R. Menna, P. York, D. Garbuzov, H. Lee, J. Abeles, N. Morris, J. Connolly, and S. Narayan. 1996. "Signal processing strategies in tunable diode laser spectrometers." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 52 (8): 843-849 [10.1016/0584-8539(95)01605-8]

    Riris, H., C. B. Carlisle, D. McMillen, and D. Cooper. 1996. "Explosives detection with a frequency modulation spectrometer." Applied optics, 35 (24): 4694--4704.

    Carlisle, C. B., R. E. Warren, and H. Riris. 1996. "Single-beam diode-laser technique for optical path-length measurements." Applied optics, 35 (22): 4349--4354.

    Carlisle, C. B., H. Riris, and D. E. Cooper. 1995. "Absorption spectroscopy of N 2 O with phase-diffusion-noise sidebands on a lead-salt tunable diode laser." Applied optics, 34 (6): 938--941.

    Riris, H., C. B. Carlisle, and R. E. Warren. 1994. "Kalman filtering of tunable diode laser spectrometer absorbance measurements." Applied Optics, 33 (24): 5506 [10.1364/ao.33.005506]

    Riris, H., C. B. Carlisle, R. E. Warren, and D. E. Cooper. 1994. "Signal-to-noise ratio enhancement in frequency-modulation spectrometers by digital signal processing." Optics Letters, 19 (2): 144 [10.1364/ol.19.000144]

    Riris, H., C. Carlisle, L. Carr, et al. D. Cooper, R. Martinelli, and R. Menna. 1994. "Design of an open path near-infrared diode laser sensor: application to oxygen, water, and carbon dioxide vapor detection." Applied optics, 33 (30): 7059--7066.

    Cooper, D. E., R. U. Martinelli, C. B. Carlisle, et al. H. Riris, D. B. Bour, and R. Menna. 1993. "Measurement of 12 CO 2: 13 CO 2 ratios for medical diagnostics with 1.6-$mu$m distributed-feedback semiconductor diode lasers." Applied optics, 32 (33): 6727--6731.

    Riris, H., C. Carlisle, D. Cooper, et al. L.-G. Wang, T. Gallagher, and R. Tipping. 1991. "Measurement of the strengths of 1← 0 and 3← 0 transitions of HI using frequency modulation spectroscopy." Journal of Molecular Spectroscopy, 146 (2): 381--388.

    Wang, L.-G., D. A. Tate, H. Riris, and T. F. Gallagher. 1989. "High-sensitivity frequency-modulation spectroscopy with a GaAlAs diode laser." JOSA B, 6 (5): 871--876.

    Carlisle, C., H. Riris, L. Wang, et al. G. Janik, T. Gallagher, A. L. Pi~neiro, and R. Tipping. 1988. "Measurement of high overtone intensities of HBr by two-tone frequency-modulation spectroscopy." Journal of Molecular Spectroscopy, 130 (2): 395--406.

    Wang, L.-G., H. Riris, C. B. Carlisle, and T. F. Gallagher. 1988. "Comparison of approaches to modulation spectroscopy with GaAlAs semiconductor lasers: application to water vapor." Applied optics, 27 (10): 2071--2077.

    Non-Refereed

    Kawa, R., G. R. Allan, J. B. Abshire, et al. H. Riris, J. Mao, W. E. Hasselbrack, K. Numata, J. Chen, M. R. Rodriguez, and M. A. Stephen. 2018. "Lidar measurements of CO2 column concentrations in the Arctic region of North America from the ASCENDS 2017 airborne campaign." Lidar Remote Sensing for Environmental Monitoring XVI [10.1117/12.2325908]

    Cremons, D. R., J. B. Abshire, M. D. Smith, et al. S. D. Guzewich, H. Riris, X. Sun, A. W. Yu, G. Allan, and F. Hovis. 2018. "Development of a Mars lidar (MARLI) for measuring wind and aerosol profiles from orbit." Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing XIV [10.1117/12.2325408]

    Graham, A., X. Sun, J. Mao, et al. R. Kawa, H. Riris, J. B. Abshire, W. Hasselbrack, M. Rodriguez, C. Weaver, S. Li, K. Numata, and S. Wu. 2017. "LIDAR technology for measuring trace gases on Mars and Earth." International Conference on Space Optics — ICSO 2010 [10.1117/12.2309207]

    Riris, H., M. Rodriguez, G. Allan, et al. W. E. Hasselbrack, M. A. Stephen, and J. B. Abshire. 2012. "Airborne LIDAR Measurements of Atmospheric Pressure Made Using the Oxygen A-band." Lasers, Sources, and Related Photonic Devices LT2B.5 [10.1364/LACSEA.2012.LT2B.5]

    Yu, A. W., M. A. Krainak, M. A. Stephen, et al. J. B. Abshire, D. J. Harding, H. Riris, S. X. Li, J. R. Chen, G. R. Allan, K. Numata, S. T. Wu, and J. B. Camp. 2011. "Spaceflight laser development for future remote sensing applications." Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VII, Proceedings of SPIE 8182: [10.1117/12.898547]

    Stephen, M. A., A. W. Yu, M. A. Krainak, et al. J. B. Abshire, D. J. Harding, H. Riris, S. X. Li, J. Chen, K. Numata, S. Wu, and J. Camp. 2011. "Spaceborne laser development for future remote sensing applications." Infrared Remote Sensing and Instrumentation XIX, Proceedings of SPIE 8154: [10.1117/12.896693]

    Riris, H., Xiaoli Sun, J. F. Cavanaugh, et al. L. Ramos-Izquierdo, P. Liiva, G. B. Jackson, S. Schmidt, J. McGarry, and D. E. Smith. 2008. "The Lunar Orbiter Laser Altimeter (LOLA) on NASA's Lunar Reconnaissance Orbiter (LRO) Mission." Proceedings of the 2008 Conference on Lasers and Electro-Optics [10.1109/cleo.2008.4551271]

    Sun, X., H. Riris, J. F. Cavanaugh, et al. J. L. Mcgarry, G. B. Jackson, R. S. Zellar, D. E. Smith, and M. T. Zuber. 2007. "The Lunar Orbiter Laser Altimeter and the Laser Ranging System on the Lunar Reconnaissance Orbiter." Proceedings of the 2007 Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science) 1-5: New York, New York, U.S.A.: 1469+, ISBN: 978-1-4244-3590-6. [Full Text (Link)]

    Abshire, J. B., Xiaoli Sun, G. Neumann, et al. J. McGarry, T. Zagwodzki, P. Jester, H. Riris, M. Zuber, and D. Smith. 2006. "Laser pulses from Earth detected at Mars." Proceedings of the 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science [10.1109/cleo.2006.4628090]

    Brief Bio

    Haris Riris joined GSFC as contractor in 1999 to work on GLAS (ICEsat I).  He became a civil servant in 2005 in the Laser Remote Sensing Branch. Prior to GSFC he held positions at SRI International in Menlo Park, CA  and  semiconductor and bioetechnology companies in Silicon Valley.  His research interests include high sensitivity laser spectroscopy, laser remote sensing, laser altimetry, and trace gas detection applications to earth and planetray science.

    Publications

    Refereed

    Riris, H., K. Numata, S. Wu, and M. Fahey. 2019. "The challenges of measuring methane from space with a LIDAR." CEAS Space Journal 11 (4): 475-483 [10.1007/s12567-019-00274-8]

    Abshire, J. B., A. K. Ramanathan, H. Riris, et al. G. R. Allan, X. Sun, W. E. Hasselbrack, J. Mao, S. Wu, J. Chen, K. Numata, S. R. Kawa, M. Y. Yang, and J. DiGangi. 2018. "Airborne measurements of CO<sub>2</sub> column concentrations made with a pulsed IPDA lidar using a multiple-wavelength-locked laser and HgCdTe APD detector." Atmospheric Measurement Techniques 11 (4): 2001-2025 [10.5194/amt-11-2001-2018]

    Nicely, J., T. Hanisco, and H. Riris. 2018. "Applicability of Neural Networks to Etalon Fringe Filtering in Laser Spectrometers." Journal of Quantitative Spectroscopy and Radiative Transfer 211C 115-122 [10.1016/j.jqsrt.2018.03.004]

    Mao, J., A. Ramanathan, J. B. Abshire, et al. S. R. Kawa, H. Riris, G. R. Allan, M. Rodriguez, W. E. Hasselbrack, X. Sun, K. Numata, J. Chen, Y. Choi, and M. Y. Yang. 2018. "Measurement of atmospheric CO<sub>2</sub> column concentrations to cloud tops with a pulsed multi-wavelength airborne lidar." Atmospheric Measurement Techniques 11 (1): 127-140 [10.5194/amt-11-127-2018]

    Riris, H., M. Rodriguez, J. Mao, G. Allan, and J. Abshire. 2017. "Airborne demonstration of atmospheric oxygen optical depth measurements with an integrated path differential absorption lidar." Optics Express 25 (23): 29307 [10.1364/oe.25.029307]

    Riris, H., K. Numata, S. Wu, et al. B. Gonzalez, M. Rodriguez, S. Scott, S. Kawa, and J. Mao. 2017. "Methane optical density measurements with an integrated path differential absorption lidar from an airborne platform." Journal of Applied Remote Sensing 11 (03): 1 [10.1117/1.jrs.11.034001]

    Numata, K., S. Wu, and H. Riris. 2014. "Fast-switching methane lidar transmitter based on a seeded optical parametric oscillator." Applied Physics B: Lasers and Optics 116 959--966

    Abshire, J. B., A. Ramanathan, H. Riris, et al. J. Mao, G. R. Allan, W. E. Hasselbrack, C. J. Weaver, and E. V. Browell. 2013. "Airborne Measurements of CO2 Column Concentration and Range Using a Pulsed Direct-Detection IPDA Lidar." Remote Sensing 6 (1): 443-469 [10.3390/rs6010443]

    Ramanathan, A. K., J. Mao, G. R. Allan, et al. H. Riris, C. J. Weaver, W. E. Hasselbrack, E. V. Browell, and J. B. Abshire. 2013. "Spectroscopic measurements of a CO₂ absorption line in an open vertical path using an airborne lidar." Applied Physics Letters 103 (21): 214102 [10.1063/1.4832616]

    Riris, H., M. Rodriguez, G. R. Allan, et al. W. Hasselbrack, J. Mao, M. Stephen, and J. Abshire. 2013. "Pulsed airborne lidar measurements of atmospheric optical depth using the Oxygen A-band at 765 nm." Applied optics 52 (25): 6369--6382

    Numata, K., H. Riris, S. Li, et al. S. Wu, S. R. Kawa, M. Krainak, and J. Abshire. 2012. "Ground demonstration of trace gas lidar based on optical parametric amplifier." Journal of Applied Remote Sensing 6 (1): 063561 [10.1117/1.JRS.6.063561]

    Riris, H., K. Numata, S. X. Li, et al. S. T. Wu, A. K. Ramanathan, M. W. Dawsey, J. Mao, S. R. Kawa, and J. B. Abshire. 2012. "Airborne measurements of atmospheric methane column abundance made using a pulsed IPDA lidar." Applied Optics 51 (34): 8296-8305 [10.1364/AO.51.008296]

    Wilson, E. L., M. F. Neveu, H. Riris, E. M. Georgieva, and W. S. Heaps. 2011. "A hollow-waveguide gas correlation radiometer for ultra-precise column measurements of formaldehyde on Mars." Measurement Science and Technology 22 (8): 085902 [10.1088/0957-0233/22/8/085902]

    Abshire, J. B., H. Riris, G. R. Allan, et al. C. J. Weaver, J. Mao, X. Sun, W. E. Hasselbrack, S. R. Kawa, and S. Biraud. 2010. "Pulsed airborne lidar measurements of atmospheric CO2 column absorption." Tellus B: Chemical and Physical Meteorology 62 (5): 770-783 [10.1111/j.1600-0889.2010.00502.x]

    Smith, D. E., M. T. Zuber, G. Jackson, et al. J. Cavanaugh, G. A. Neumann, H. Riris, X. Sun, R. S. Zellar, C. Coltharp, J. Connelly, R. Katz, I. Kleyner, P. M. Liiva, A. Matuszeski, E. Mazarico, J. L. Mcgarry, A. Nova-Gradac, M. Ott, C. Peters, L. A. Ramos-Izquierdo, L. Ramsey, D. D. Rowlands, S. Schmidt, V. S. Scott, G. Shaw, J. Swinski, M. H. Torrence, G. Unger, A. Yu, and T. W. Zagwodzki. 2010. "The Lunar Orbiter Laser Altimeter Investigation on the Lunar Reconnaissance Orbiter Mission." Space Science Reviews 150 (1-4): 209-241

    Ramos-Izquierdo, L., V. S. Scott, J. Connelly, et al. S. Schmidt, W. Mamakos, J. Guzek, C. Peters, P. Liiva, M. Rodriguez, J. Cavanaugh, and H. Riris. 2009. "Optical system design and integration of the Lunar Orbiter Laser Altimeter." Applied Optics 48 (16): 3035 [10.1364/ao.48.003035]

    Stephen, M., M. Krainak, H. Riris, and G. R. Allan. 2007. "Narrowband, tunable, frequency-doubled, erbium-doped fiber-amplifed transmitter." Optics Letters 32 (15): 2073--2075

    Abshire, J. B., X. Sun, H. Riris, et al. J. M. Sirota, J. F. McGarry, S. Palm, D. Yi, and P. Liiva. 2005. "Geoscience Laser Altimeter System (GLAS) on the ICESat Mission: On-orbit measurement performance." Geophysical Research Letters 32 (21): L21S02 [Full Text (Link)] [10.1029/2005GL024028]

    Abshire, J., Xiaoli Sun, H. Riris, et al. M. Sirota, J. McGarry, S. Palm, E. Ketchum, and R. Follas. 2004. "Geoscience laser altimeter system (GLAS) on the ICESat mission: pre-launch and on-orbit measurement performance." IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings [10.1109/igarss.2003.1294166]

    Riris, H., C. B. Carlisle, R. E. Warren, et al. D. E. Cooper, R. Martinelli, R. Menna, P. York, D. Garbuzov, H. Lee, J. Abeles, N. Morris, J. Connolly, and S. Narayan. 1996. "Signal processing strategies in tunable diode laser spectrometers." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 52 (8): 843-849 [10.1016/0584-8539(95)01605-8]

    Riris, H., C. B. Carlisle, D. McMillen, and D. Cooper. 1996. "Explosives detection with a frequency modulation spectrometer." Applied optics 35 (24): 4694--4704

    Carlisle, C. B., R. E. Warren, and H. Riris. 1996. "Single-beam diode-laser technique for optical path-length measurements." Applied optics 35 (22): 4349--4354

    Carlisle, C. B., H. Riris, and D. E. Cooper. 1995. "Absorption spectroscopy of N 2 O with phase-diffusion-noise sidebands on a lead-salt tunable diode laser." Applied optics 34 (6): 938--941

    Riris, H., C. B. Carlisle, and R. E. Warren. 1994. "Kalman filtering of tunable diode laser spectrometer absorbance measurements." Applied Optics 33 (24): 5506 [10.1364/ao.33.005506]

    Riris, H., C. B. Carlisle, R. E. Warren, and D. E. Cooper. 1994. "Signal-to-noise ratio enhancement in frequency-modulation spectrometers by digital signal processing." Optics Letters 19 (2): 144 [10.1364/ol.19.000144]

    Riris, H., C. Carlisle, L. Carr, et al. D. Cooper, R. Martinelli, and R. Menna. 1994. "Design of an open path near-infrared diode laser sensor: application to oxygen, water, and carbon dioxide vapor detection." Applied optics 33 (30): 7059--7066

    Cooper, D. E., R. U. Martinelli, C. B. Carlisle, et al. H. Riris, D. B. Bour, and R. Menna. 1993. "Measurement of 12 CO 2: 13 CO 2 ratios for medical diagnostics with 1.6-$mu$m distributed-feedback semiconductor diode lasers." Applied optics 32 (33): 6727--6731

    Riris, H., C. Carlisle, D. Cooper, et al. L.-G. Wang, T. Gallagher, and R. Tipping. 1991. "Measurement of the strengths of 1← 0 and 3← 0 transitions of HI using frequency modulation spectroscopy." Journal of Molecular Spectroscopy 146 (2): 381--388

    Wang, L.-G., D. A. Tate, H. Riris, and T. F. Gallagher. 1989. "High-sensitivity frequency-modulation spectroscopy with a GaAlAs diode laser." JOSA B 6 (5): 871--876

    Carlisle, C., H. Riris, L. Wang, et al. G. Janik, T. Gallagher, A. L. Pi~neiro, and R. Tipping. 1988. "Measurement of high overtone intensities of HBr by two-tone frequency-modulation spectroscopy." Journal of Molecular Spectroscopy 130 (2): 395--406

    Wang, L.-G., H. Riris, C. B. Carlisle, and T. F. Gallagher. 1988. "Comparison of approaches to modulation spectroscopy with GaAlAs semiconductor lasers: application to water vapor." Applied optics 27 (10): 2071--2077

    Non-Refereed

    Kawa, R., G. R. Allan, J. B. Abshire, et al. H. Riris, J. Mao, W. E. Hasselbrack, K. Numata, J. Chen, M. R. Rodriguez, and M. A. Stephen. 2018. "Lidar measurements of CO2 column concentrations in the Arctic region of North America from the ASCENDS 2017 airborne campaign." Lidar Remote Sensing for Environmental Monitoring XVI [10.1117/12.2325908]

    Cremons, D. R., J. B. Abshire, M. D. Smith, et al. S. D. Guzewich, H. Riris, X. Sun, A. W. Yu, G. Allan, and F. Hovis. 2018. "Development of a Mars lidar (MARLI) for measuring wind and aerosol profiles from orbit." Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing XIV [10.1117/12.2325408]

    Graham, A., X. Sun, J. Mao, et al. R. Kawa, H. Riris, J. B. Abshire, W. Hasselbrack, M. Rodriguez, C. Weaver, S. Li, K. Numata, and S. Wu. 2017. "LIDAR technology for measuring trace gases on Mars and Earth." International Conference on Space Optics — ICSO 2010 [10.1117/12.2309207]

    Riris, H., M. Rodriguez, G. Allan, et al. W. E. Hasselbrack, M. A. Stephen, and J. B. Abshire. 2012. "Airborne LIDAR Measurements of Atmospheric Pressure Made Using the Oxygen A-band." Lasers, Sources, and Related Photonic Devices LT2B.5 [10.1364/LACSEA.2012.LT2B.5]

    Yu, A. W., M. A. Krainak, M. A. Stephen, et al. J. B. Abshire, D. J. Harding, H. Riris, S. X. Li, J. R. Chen, G. R. Allan, K. Numata, S. T. Wu, and J. B. Camp. 2011. "Spaceflight laser development for future remote sensing applications." Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VII, Proceedings of SPIE 8182 [10.1117/12.898547]

    Stephen, M. A., A. W. Yu, M. A. Krainak, et al. J. B. Abshire, D. J. Harding, H. Riris, S. X. Li, J. Chen, K. Numata, S. Wu, and J. Camp. 2011. "Spaceborne laser development for future remote sensing applications." Infrared Remote Sensing and Instrumentation XIX, Proceedings of SPIE 8154 [10.1117/12.896693]

    Riris, H., Xiaoli Sun, J. F. Cavanaugh, et al. L. Ramos-Izquierdo, P. Liiva, G. B. Jackson, S. Schmidt, J. McGarry, and D. E. Smith. 2008. "The Lunar Orbiter Laser Altimeter (LOLA) on NASA's Lunar Reconnaissance Orbiter (LRO) Mission." Proceedings of the 2008 Conference on Lasers and Electro-Optics [10.1109/cleo.2008.4551271]

    Sun, X., H. Riris, J. F. Cavanaugh, et al. J. L. Mcgarry, G. B. Jackson, R. S. Zellar, D. E. Smith, and M. T. Zuber. 2007. "The Lunar Orbiter Laser Altimeter and the Laser Ranging System on the Lunar Reconnaissance Orbiter." Proceedings of the 2007 Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science) 1-5 1469+ [Full Text (Link)]

    Abshire, J. B., Xiaoli Sun, G. Neumann, et al. J. McGarry, T. Zagwodzki, P. Jester, H. Riris, M. Zuber, and D. Smith. 2006. "Laser pulses from Earth detected at Mars." Proceedings of the 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science [10.1109/cleo.2006.4628090]

                                                                                                                                                                                            
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