Xiaoli Sun

Xiaoli Sun

  • RSCH AST, EARTH SCIENCES REMOTE SENS
  • 301.614.6732 | 301.614.6744
  • NASA/GSFC
  • Mail Code: 698
  • Greenbelt , MD 20771
  • Employer: NASA
  • Brief Bio

    Xiaoli Sun is a Research Physical Scientist at the Planetary Geology, Geophysics, and Geochemistry Laboratory, NASA Goddard Space Flight Center (GSFC). He was the Lead Engineer in the photodetector development and receiver performance analysis for various space lidar developed at NASA GSFC, including the Mars Orbiter Laser Altimeter on the Mars Global Surveyor Mission and the Geoscience Laser Altimeter System on the ICESat Mission. He was the instrument scientist for the Mercury Laser Altimeter on the MESSENGER mission, the Lunar Orbiter Laser Altimeter, and the one-way Laser Ranging system on the Lunar Reconnaissance Orbiter (LRO) mission. He led the first two-way laser ranging experiment between the MESSENGER spacecraft and Earth over 24 million km in 2005, and the first lunar laser communication experiments from Earth to LRO at lunar distance in 2012. Recently, he has been leading the research and application of HgCdTe avalanche photodiode arrays for future swath mapping lidar and spectroscopic infrared lidar at NASA GSFC. He received the B.S. degree from Taiyuan Institute of Technology, Taiyuan, China, in 1982, and the M.S. and Ph.D. degrees in electrical engineering from the Johns Hopkins University, Baltimore, MD, USA, in 1985 and 1989, respectively.

    Research Interests

    Laser remote sensing from space.

    lidar in space from orbiting spacecraft and on landers and rovers for range and spectroscopic measurements from visible to infrared.

    Advanced lidar detectors.

    Current Projects

    Small All-range Lidar (SALi) under a MatISSE-18 program and linear mode photon counting lidar detectors under a PICASSO-17 program.

    SALi/MatISSE: To develop a prototype small and all-range lidar for asteroids, comet cores, and other planetary bodies. 

    HgCdTe APD array/PICASSO: To develop a multi-pixel linear mode photon detector from visible to mid-infrared to improve and extend space lidar measurement capabilities in finer spatial resolution and coverage, laser wavelength range, atmosphere vertical profile, and laser spectral absorption from visible to mid-infrared.

    Laser retro-reflector arrays for lunar landers

    Miniature laser retro-reflector arrays on top of lunar landers for laser ranging from orbiting lidar.

    Education

    1989 Ph.D. in electrical engineering, Johns Hopkins University, Baltimore MD
    1985 M.S.E., Johns Hopkins University, Baltimore, MD
    1982 B.S. Taiyuan Institute of Technology, Taiyuan, China.

    Selected Publications

    Refereed

    Mazarico, E., X. Sun, J.-M. Torre, et al. C. Courde, J. Chabé, M. Aimar, H. Mariey, N. Maurice, M. K. Barker, D. Mao, D. R. Cremons, S. Bouquillon, T. Carlucci, V. Viswanathan, F. G. Lemoine, A. Bourgoin, P. Exertier, G. A. Neumann, M. T. Zuber, and D. E. Smith. 2020. "First Two-way Laser Ranging to a Lunar Orbiter: infrared observations from the Grasse station to LRO’s retro-reflector array ." Earth, Planets and Space, (In Press) [Full Text (Link)] [10.1186/s40623-020-01243-w]

    Cremons, D. R., X. Sun, Z. H. Denny, et al. E. D. Hoffman, E. Mazarico, S. W. Wake, E. Aaron, and D. E. Smith. 2020. "Optical Characterization of Laser Retroreflector Arrays for Lunar Landers." Applied Optics, 59 (16): 5020-5031 [https://doi.org/10.1364/AO.388371]

    Cremons, D. R., J. B. Abshire, X. Sun, et al. G. Allan, H. Riris, M. D. Smith, S. Guzewich, A. Yu, and F. Hovis. 2020. "Design of a direct-detection wind and aerosol lidar for mars orbit." CEAS Space Journal, 12 (2): 149-162 [10.1007/s12567-020-00301-z]

    Sun, X., D. E. Smith, E. D. Hoffman, et al. S. W. Wake, D. R. Cremons, E. Mazarico, J.-M. Lauenstein, and E. C. Aaron. 2019. "Small and Lightweight Laser Retro-Reflector Arrays for Lunar Landers." Applied Optics, 58 (33): 9259-9266 [10.1364/AO.58.009259]

    Exertier, P., A. Belli, E. Samain, et al. W. Meng, H. Zhang, K. Tang, A. Schlicht, U. Schreiber, U. Hugentobler, I. Prochàzka, X. Sun, J. F. McGarry, D. Mao, and A. Neumann. 2019. "Time and laser ranging: a window of opportunity for geodesy, navigation, and metrology." Journal of Geodesy, 93 (11): 2389–2404 [10.1007/s00190-018-1173-8]

    Barker, M. K., E. Mazarico, T. P. Mcclanahan, et al. X. Sun, G. A. Neumann, D. E. Smith, M. T. Zuber, and J. W. Head. 2019. "Searching for lunar horizon glow with the Lunar Orbiter Laser Altimeter." Journal of Geophysical Research - Planets, [10.1029/2019JE006020]

    Sun, X., J. B. Abshire, M. A. Krainak, et al. W. Lu, J. D. Beck, W. W. Sullivan, P. Mitra, D. M. Rawlings, R. A. Fields, D. A. Hinkley, and B. S. Hirasuna. 2019. "HgCdTe avalanche photodiode array detectors with single photon sensitivity and integrated detector cooler assemblies for space lidar applications." Optical Engineering, 58 (06): 1 [10.1117/1.oe.58.6.067103]

    Hancock, S., J. Armston, M. Hofton, et al. X. Sun, H. Tang, L. I. Duncanson, J. R. Kellner, and R. Dubayah. 2019. "The GEDI simulator: A large‐footprint waveform lidar simulator for calibration and validation of spaceborne missions." Earth and Space Science, 6 (2): 294-310 [10.1029/2018ea000506]

    Barker, M. K., X. Sun, D. Mao, et al. E. Mazarico, G. A. Neumann, M. T. Zuber, D. E. Smith, J. L. Mcgarry, and E. D. Hoffman. 2018. "In-flight characterization of the lunar orbiter laser altimeter instrument pointing and far-field pattern." Applied Optics, 57 (27): 7702 [10.1364/ao.57.007702]

    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]

    Smith, D. E., M. T. Zuber, E. Mazarico, et al. A. Genova, G. A. Neumann, X. Sun, M. H. Torrence, and D.-D. Mao. 2018. "Trilogy, a planetary geodesy mission concept for measuring the expansion of the solar system." Planetary and Space Science, 153: 127-133 [Full Text (Link)] [10.1016/j.pss.2018.02.003]

    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]

    Ramanathan, A. K., H. M. Nguyen, X. Sun, et al. J. Mao, J. B. Abshire, J. M. Hobbs, and A. J. Braverman. 2018. "A singular value decomposition framework for retrievals with vertical distribution information from greenhouse gas column absorption spectroscopy measurements." Atmospheric Measurement Techniques, 11 (8): 4909--4928 [10.5194/amt-11-4909-2018]

    Sun, X., J. B. Abshire, A. A. Borsa, et al. H. A. Fricker, D. Yi, J. P. Dimarzio, F. S. Paolo, K. M. Brunt, D. J. Harding, and G. A. Neumann. 2017. "ICESAT/GLAS Altimetry Measurements: Received Signal Dynamic Range and Saturation Correction." IEEE Transactions on Geoscience and Remote Sensing, 1-15 [10.1109/tgrs.2017.2702126]

    Mao, D., J. L. Mcgarry, E. Mazarico, et al. G. A. Neumann, X. Sun, M. H. Torrence, T. W. Zagwodzki, D. D. Rowlands, E. D. Hoffman, J. E. Horvath, J. E. Golder, M. K. Barker, D. E. Smith, and M. T. Zuber. 2017. "The Laser Ranging Experiment of the Lunar Reconnaissance Orbiter: Five Years of Operations and Data Analysis." Icarus, 283: 55-69 [10.1016/j.icarus.2016.07.003]

    Smith, D. E., M. T. Zuber, G. A. Neumann, et al. E. Mazarico, F. G. Lemoine, J. W. Head, P. G. Lucey, O. Aharonson, M. S. Robinson, X. Sun, M. H. Torrence, M. K. Barker, J. Oberst, T. C. Duxbury, D. Mao, O. S. Barnouin, K. Jha, D. D. Rowlands, S. Goossens, D. M. Hollibaugh Baker, S. Bauer, P. Gläser, M. Lemelin, M. Rosenburg, M. M. Sori, J. Whitten, and T. Mcclanahan. 2017. "Summary of the Results from the Lunar Orbiter Laser Altimeter after Seven Years in Lunar Orbit." Icarus, 283: 70-91 [10.1016/j.icarus.2016.06.006]

    Barker, M. K., X. Sun, E. Mazarico, et al. G. A. Neumann, M. T. Zuber, and D. E. Smith. 2016. "Lunar phase function at 1064 nm from Lunar Orbiter Laser Altimeter passive and active radiometry." Icarus, 273: 96–113 [10.1016/j.icarus.2016.02.008]

    Prochazka, I., J. Kodet, J. Blazej, and X. Sun. 2015. "Radiation-resistant photon-counting detector package providing sub-ps stability for laser time transfer in space." Journal of Modern Optics, 62 (20): 1703-1708 [10.1080/09500340.2015.1076078]

    Sun, X., and G. A. Neumann. 2014. "Calibration of the Mercury Laser Altimeter on the MESSENGER Spacecraft." IEEE Transactions on Geoscience and Remote Sensing, 53 (5): 2860-2874 [10.1109/TGRS.2014.2366080]

    Neumann, G. A., J. F. Cavanaugh, X. Sun, et al. E. M. Mazarico, D. E. Smith, M. T. Zuber, D. Mao, D. A. Paige, S. C. Solomon, C. M. Earnst, and O. S. Barnouin. 2013. "Bright and Dark Polar Deposits on Mercury: Evidence for Surface Volatiles." Science, 339 (6117): 296-300 [Full Text (Link)] [10.1126/science.1229764]

    Sun, X., D. R. Skillman, E. D. Hoffman, et al. D. Mao, J. F. McGarry, L. McIntire, R. S. Zellar, F. M. Davidson, W. H. Fong, M. A. Krainak, G. A. Neumann, M. T. Zuber, and D. E. Smith. 2013. "Free space laser communication experiments from Earth to the Lunar Reconnaissance Orbiter in lunar orbit." Optics Express, 21 (2): 1865 [10.1364/oe.21.001865]

    Sun, X., J. B. Abshire, J. F. McGarry, et al. G. A. Neumann, D. Smith, J. F. Cavanaugh, D. J. Harding, H. J. Zwally, and D. E. Smith. 2013. "Space lidar developed at the NASA Goddard Space Flight Center - the first 20 years." IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 6 (3): 1660-1675 [doi:10.1109/jstars.2013.2259578]

    Zuber, M. T., D. E. Smith, R. Phillips, et al. S. Solomon, G. A. Neumann, S. Hauck, S. Peale, O. Barnouin, J. Head, C. C. Johnson, F. G. Lemoine, E. M. Mazarico, X. Sun, M. H. Torrence, A. Freed, C. Klimczak, J. Margot, J. Oberst, M. A. Perry, C. Ernst, R. McNutt, J. Balcerski, N. Michel, M. Talpe, and D. Yang. 2012. "Topography of the Northern Hemisphere of Mercury from MESSENGER Laser Altimetry." Science , 336 (6078): 217-220 [Full Text (Link)] [10.1126/science.1218805]

    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]

    Zuber, M. T., D. E. Smith, R. S. Zellar, et al. G. A. Neumann, X. Sun, R. Katz, I. Kleyner, A. Matuszeski, J. L. Mcgarry, M. Ott, L. A. Ramos-Izquierdo, D. D. Rowlands, M. H. Torrence, and T. W. Zagwodzki. 2010. "The Lunar Reconnaissance Orbiter Laser Ranging Investigation." Space Science Reviews, 150 (1-4): 63-80 [10.1007/s11214-009-9511-z]

    Kawa, S., J. Mao, J. Abshire, et al. G. Collatz, X. Sun, and C. Weaver. 2010. "Simulation studies for a space-based CO2 lidar mission." Tellus B, 62 (5): 759-769 [10.1111/j.1600-0889.2010.00486.X]

    Smith, D. E., M. T. Zuber, G. A. Neumann, et al. F. G. Lemoine, E. M. Mazarico, M. H. Torrence, J. L. Mcgarry, D. D. Rowlands, J. Head, T. Duxbury, O. Aharonson, P. Lucey, M. Robinson, O. Barnouin, J. Cavanaugh, X. Sun, P. M. Liiva, D. Mao, J. Smith, and A. Bartels. 2010. "Initial observations from the Lunar Orbiter Laser Altimeter (LOLA)." Geophys. Res. Lett., 37: [Full Text (Link)] [10.1029/2010GL043751]

    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.

    Cavanaugh, J. F., J. C. Smith, X. Sun, et al. A. E. Bartels, L. Ramos-Izquierdo, D. J. Krebs, J. F. McGarry, R. Trunzo, A. M. Novo-Gradac, J. L. Britt, J. Karsh, R. B. Katz, A. T. Lukemire, R. Szymkiewicz, D. L. Berry, J. P. Swinski, G. A. Neumann, M. T. Zuber, and D. E. Smith. 2007. "The Mercury Laser Altimeter Instrument for the MESSENGER Mission." Space Science Reviews, 131 (1-4): 451-479 [10.1007/s11214-007-9273-4]

    Smith, D. E., M. T. Zuber, X. Sun, et al. G. A. Neumann, J. F. Cavamaugh, J. L. Mcgarry, and T. W. Zagwodzki. 2006. "Two-Way Laser Link over Interplanetary Distance." Science, 311 (5757): 53-53 [10.1126/science.1120091]

    Sun, X., G. A. Neumann, J. B. Abshire, and M. T. Zuber. 2006. "Mars 1064 nm spectral radiance measurements determined from the receiver noise response of the Mars Orbiter Laser Altimeter." Applied Optics IP, vol 45, Issue 17, pp3960-3971, 45: 3960 [Full Text (Link)] [10.1364/AO.45.003960]

    Yi, D., H. J. Zwally, and X. Sun. 2005. "ICESat Measurement of Greenland Ice Sheet Surface Slope and Roughness." Annals of Glaciology, 42: 83-89.

    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]

    Neumann, G. A., J. B. Abshire, O. Aharonson, et al. J. B. Garvin, X. Sun, and M. T. Zuber. 2003. "Mars Orbiter Laser Altimeter pulse width measurements and footprint-scale roughness." Geophysical Research Letters, 30 (11): 1561 [10.1029/2003GL017048]

    Smith, D. E., M. T. Zuber, H. V. Frey, et al. J. B. Garvin, J. W. Head, D. O. Muhleman, G. H. Pettengill, R. J. Phillips, S. C. Solomon, H. J. Zwally, W. B. Banerdt, T. C. Duxbury, M. P. Golombek, F. G. Lemoine, G. A. Neumann, D. D. Rowlands, O. Aharonson, P. G. Ford, A. B. Ivanov, C. L. Johnson, P. J. McGovern, J. B. Abshire, R. S. Afzal, and X. Sun. 2001. "Mars Orbiter Laser Altimeter: Experiment summary after the first year of global mapping of Mars ." J. Geophysical Research-Planets, 106 (E10): 23689-23722 [Full Text (Link)] [10.1029/2000JE001364]

    Abshire, J. B., X. Sun, and R. S. Afzal. 2000. "Mars Orbiter Laser Altimeter: Receiver Model and Performance Analysis." Applied Optics LP, vol 39, Issue 15, pp2449-2460, 39: 2449 [Full Text (Link)] [10.1364/AO.39.002449]

    Non-Refereed

    Sandford, M., P. G. Lucey, X. Sun, and D. Cremons. 2018. "A spectrographic receiver for laser spectrometers." Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications VII 10780: [10.1117/12.2324818]

    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]

    Hubbs, J. E., X. Sun, J. B. Abshire, et al. J.-M. Lauenstein, W. Sullivan, and J. Beck. 2018. "Evaluation of space radiation effects on HgCdTe avalanche photodiode arrays for Lidar applications." Infrared Technology and Applications XLIV [10.1117/12.2304601]

    Sun, X., J. B. Abshire, M. A. Krainak, et al. J. Beck, W. W. Sullivan, P. Mitra, D. Rawlings, W. Lu, R. A. Fields, D. A. Hinkley, and B. Hirasuna. 2018. "Single photon HgCdTe avalanche photodiode and integrated detector cooler assemblies for space lidar applications." Advanced Photon Counting Techniques XII [10.1117/12.2305017]

    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]

    Mcgarry, J. L., D. Mao, E. Mazarico, et al. G. A. Neumann, X. Sun, M. H. Torrence, M. K. Barker, E. D. Hoffman, J. E. Horvath, D. E. Smith, and M. T. Zuber. 2016. "The Contributions of ILRS Laser Ranging to the Lunar Reconnaissance Orbiter Mission." 20th International Workshop on Laser Ranging, Potsdam Germany, October 9-14, 2016 [Full Text (Link)]

    Shappirio, M., J. L. Mcgarry, J. L. Bufton, et al. J. W. Cheek, D. B. Coyle, S. M. Hull, P. R. Stysley, X. Sun, R. P. Young, and T. W. Zagwodzki. 2016. "Application of Satellite Laser Ranging Techniques for Space Situational Awareness Efforts." Proceedings of the Advanced Maui Optical and Space Surveillance Technologies Conference, Wailea, Maui, Hawaii, September 20-23, 2016, [Full Text (Link)]

    Sullivan, W., J. Beck, R. Scritchfield, et al. M. Skokan, P. Mitra, X. Sun, J. Abshire, D. Carpenter, and B. Lane. 2015. "Linear mode photon counting from visible to MWIR with HgCdTe avalanche photodiode focal plane arrays." Advanced Photon Counting Techniques IX [10.1117/12.2180394]

    Yu, A. W., X. Sun, S. X. Li, J. F. Cavanaugh, and G. A. Neumann. 2014. "In-flight performance of the Mercury Laser Altimeter laser transmitter." Solid State Lasers XXIII: Technology and Devices [10.1117/12.2041452]

    Sun, X., J. F. Cavanaugh, J. C. SMith, et al. J. B. Abshire, J. L. Mcgarry, G. A. Neumann, D. J. Harding, H. J. Zwally, D. E. Smith, and M. T. Zuber. 2013. "SPACE LIDARS DEVELOPED AT NASA GSFC." IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING (JSTARS) 6 (3): 1660 - 1675 [ 10.1109/JSTARS.2013.2259578]

    Sun, X., D. R. Skillman, E. D. Hoffman, et al. D. Mao, J. L. Mcgarry, G. A. Neumann, L. McIntire, R. S. Zellar, F. M. Davidson, W. H. Fong, M. A. Krainak, M. T. Zuber, and D. E. Smith. 2013. "Simultaneous Laser Ranging and Communication from an Earth-Based Satellite Laser Ranging Station to the Lunar Reconnaissance Orbiter in Lunar Orbit.”." Proceedings of the SPIE XXV Conference on Free-Space Laser Communication and Atmospheric Propagation [10.1117/12.2006645]

    Yu, A. W., M. A. Krainak, D. J. Harding, et al. J. B. Abshire, X. Sun, L. Ramos-Izquierdo, J. Cavanaugh, S. Valett, T. Winkert, M. Plants, C. Kirchner, B. Kamamia, R. Faulkner, P. Dogoda, W. Hasselbrack, and T. Filemyr. 2013. "A 16-beam non-scanning swath mapping laser altimeter instrument." Solid State Lasers XXII: Technology and Devices, Proceedings of SPIE 8599: [10.1117/12.2005651]

    Sun, X., J. F. Cavanaugh, G. A. Neumann, D. E. Smith, and M. T. Zuber. 2012. "Mapping Mercury Topography by Laser – Performance of the Mercury Laser Altimeter on the MESSENGER Spacecraft." SPIE Newsroom 3 [10.1117/2.1201210.004489]

    Yu, A. W., M. A. Krainak, D. J. Harding, et al. J. B. Abshire, X. Sun, J. Cavanaugh, S. Valett, and L. Ramos-Izquierdo. 2012. "Multi-beam Laser Altimeter System Simulator for the Lidar Surface Topography (LIST) Mission." 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) [Full Text (Link)] [10.1364/CLEO_AT.2012.ATu2G.6]

    Yu, A. W., M. A. Krainak, D. J. Harding, et al. J. B. Abshire, X. Sun, J. Cavanaugh, S. Valett, L. Ramos-Izquierdo, T. Winkert, C. Kirchner, M. Plants, T. Filemyr, B. Kamamia, W. Hasselbrack, and P. Dogoda. 2011. "Development effort of the airborne lidar simulator for the lidar surface topography (LIST) mission." Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VII, Proceedings of SPIE 8182: [10.1117/12.898545]

    Yu, A. W., M. A. Krainak, D. J. Harding, et al. J. B. Abshire, X. Sun, S. Valett, J. Cavanaugh, and L. Ramos-Izquierdo. 2010. "Spaceborne laser instruments for high-resolution mapping." Solid State Lasers XIX: Technology and Devices, Proceedings of SPIE 7578: [10.1117/12.843191]

    Yu, A. W., M. A. Krainak, D. J. Harding, J. B. Abshire, and X. Sun. 2010. "A Spaceborne lidar for high resolution topographic mapping of the Earths surface." SPIE Newsroom [10.1117/2.1201002.002655]

    Dabney, P. W., D. J. Harding, J. B. Abshire, et al. T. E. Huss, G. F. Jodor, R. L. Machan, J. Marzouk, K. Rush, A. Seas, C. A. Shuman, X. Sun, S. Valett, A. Vasilyev, A. Yu, and Y. Zheng. 2010. "The Slope Imaging Multi-polarization Photon-counting Lidar: Development and performance results." Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International 653-656 [10.1109/IGARSS.2010.5650862]

    Sun, X., G. A. Neumann, J. Cavanaugh, et al. J. L. Mcgarry, D. E. Smith, and M. T. Zuber. 2009. "Laser Altimeter Measurements from MESSENGER's Recent Mercury Flybys." 2009 Conference on Lasers and Electro-Optics and Quantum Electronics and Laser Science New York, New York, U.S.A.: 116-117, ISBN: 978-1-55752-869-8 . [Full Text (Link)]

    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]

    Krainak, M. A., J. R. Chen, P. W. Dabney, et al. J. F. Ferrara, W. H. Fong, A. J. Martino, J. F. McGarry, S. M. Merkowitz, C. M. Principe, X. Sun, and T. W. Zagwodzki. 2008. "Direct-detection free-space laser transceiver test-bed." Proceedings of the Free-Space Laser Communication Technologies XX SPIE.6877: 687703 [10.1117/12.758654]

    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., D. J. Harding, X. Sun, et al. M. A. Krainak, T. Seas, and P. Dabney. 2007. "Pushbroom Laser Altimetry using Fiber Lasers and Photon Counting Detectors ." 2007 Conference on Lasers & Electro-Optics/Quantum Electronics and Laser Science Conference (CLEO/QELS 1-5: 1467-1468 [Full Text (Link)]

    Brief Bio

    Xiaoli Sun is a Research Physical Scientist at the Planetary Geology, Geophysics, and Geochemistry Laboratory, NASA Goddard Space Flight Center (GSFC). He was the Lead Engineer in the photodetector development and receiver performance analysis for various space lidar developed at NASA GSFC, including the Mars Orbiter Laser Altimeter on the Mars Global Surveyor Mission and the Geoscience Laser Altimeter System on the ICESat Mission. He was the instrument scientist for the Mercury Laser Altimeter on the MESSENGER mission, the Lunar Orbiter Laser Altimeter, and the one-way Laser Ranging system on the Lunar Reconnaissance Orbiter (LRO) mission. He led the first two-way laser ranging experiment between the MESSENGER spacecraft and Earth over 24 million km in 2005, and the first lunar laser communication experiments from Earth to LRO at lunar distance in 2012. Recently, he has been leading the research and application of HgCdTe avalanche photodiode arrays for future swath mapping lidar and spectroscopic infrared lidar at NASA GSFC. He received the B.S. degree from Taiyuan Institute of Technology, Taiyuan, China, in 1982, and the M.S. and Ph.D. degrees in electrical engineering from the Johns Hopkins University, Baltimore, MD, USA, in 1985 and 1989, respectively.

    Selected Publications

    Refereed

    Mazarico, E., X. Sun, J.-M. Torre, et al. C. Courde, J. Chabé, M. Aimar, H. Mariey, N. Maurice, M. K. Barker, D. Mao, D. R. Cremons, S. Bouquillon, T. Carlucci, V. Viswanathan, F. G. Lemoine, A. Bourgoin, P. Exertier, G. A. Neumann, M. T. Zuber, and D. E. Smith. 2020. "First Two-way Laser Ranging to a Lunar Orbiter: infrared observations from the Grasse station to LRO’s retro-reflector array ." Earth, Planets and Space (In Press) [Full Text (Link)] [10.1186/s40623-020-01243-w]

    Cremons, D. R., X. Sun, Z. H. Denny, et al. E. D. Hoffman, E. Mazarico, S. W. Wake, E. Aaron, and D. E. Smith. 2020. "Optical Characterization of Laser Retroreflector Arrays for Lunar Landers." Applied Optics 59 (16): 5020-5031 [https://doi.org/10.1364/AO.388371]

    Cremons, D. R., J. B. Abshire, X. Sun, et al. G. Allan, H. Riris, M. D. Smith, S. Guzewich, A. Yu, and F. Hovis. 2020. "Design of a direct-detection wind and aerosol lidar for mars orbit." CEAS Space Journal 12 (2): 149-162 [10.1007/s12567-020-00301-z]

    Sun, X., D. E. Smith, E. D. Hoffman, et al. S. W. Wake, D. R. Cremons, E. Mazarico, J.-M. Lauenstein, and E. C. Aaron. 2019. "Small and Lightweight Laser Retro-Reflector Arrays for Lunar Landers." Applied Optics 58 (33): 9259-9266 [10.1364/AO.58.009259]

    Exertier, P., A. Belli, E. Samain, et al. W. Meng, H. Zhang, K. Tang, A. Schlicht, U. Schreiber, U. Hugentobler, I. Prochàzka, X. Sun, J. F. McGarry, D. Mao, and A. Neumann. 2019. "Time and laser ranging: a window of opportunity for geodesy, navigation, and metrology." Journal of Geodesy 93 (11): 2389–2404 [10.1007/s00190-018-1173-8]

    Barker, M. K., E. Mazarico, T. P. Mcclanahan, et al. X. Sun, G. A. Neumann, D. E. Smith, M. T. Zuber, and J. W. Head. 2019. "Searching for lunar horizon glow with the Lunar Orbiter Laser Altimeter." Journal of Geophysical Research - Planets [10.1029/2019JE006020]

    Sun, X., J. B. Abshire, M. A. Krainak, et al. W. Lu, J. D. Beck, W. W. Sullivan, P. Mitra, D. M. Rawlings, R. A. Fields, D. A. Hinkley, and B. S. Hirasuna. 2019. "HgCdTe avalanche photodiode array detectors with single photon sensitivity and integrated detector cooler assemblies for space lidar applications." Optical Engineering 58 (06): 1 [10.1117/1.oe.58.6.067103]

    Hancock, S., J. Armston, M. Hofton, et al. X. Sun, H. Tang, L. I. Duncanson, J. R. Kellner, and R. Dubayah. 2019. "The GEDI simulator: A large‐footprint waveform lidar simulator for calibration and validation of spaceborne missions." Earth and Space Science 6 (2): 294-310 [10.1029/2018ea000506]

    Barker, M. K., X. Sun, D. Mao, et al. E. Mazarico, G. A. Neumann, M. T. Zuber, D. E. Smith, J. L. Mcgarry, and E. D. Hoffman. 2018. "In-flight characterization of the lunar orbiter laser altimeter instrument pointing and far-field pattern." Applied Optics 57 (27): 7702 [10.1364/ao.57.007702]

    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]

    Smith, D. E., M. T. Zuber, E. Mazarico, et al. A. Genova, G. A. Neumann, X. Sun, M. H. Torrence, and D.-D. Mao. 2018. "Trilogy, a planetary geodesy mission concept for measuring the expansion of the solar system." Planetary and Space Science 153 127-133 [Full Text (Link)] [10.1016/j.pss.2018.02.003]

    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]

    Ramanathan, A. K., H. M. Nguyen, X. Sun, et al. J. Mao, J. B. Abshire, J. M. Hobbs, and A. J. Braverman. 2018. "A singular value decomposition framework for retrievals with vertical distribution information from greenhouse gas column absorption spectroscopy measurements." Atmospheric Measurement Techniques 11 (8): 4909--4928 [10.5194/amt-11-4909-2018]

    Sun, X., J. B. Abshire, A. A. Borsa, et al. H. A. Fricker, D. Yi, J. P. Dimarzio, F. S. Paolo, K. M. Brunt, D. J. Harding, and G. A. Neumann. 2017. "ICESAT/GLAS Altimetry Measurements: Received Signal Dynamic Range and Saturation Correction." IEEE Transactions on Geoscience and Remote Sensing 1-15 [10.1109/tgrs.2017.2702126]

    Mao, D., J. L. Mcgarry, E. Mazarico, et al. G. A. Neumann, X. Sun, M. H. Torrence, T. W. Zagwodzki, D. D. Rowlands, E. D. Hoffman, J. E. Horvath, J. E. Golder, M. K. Barker, D. E. Smith, and M. T. Zuber. 2017. "The Laser Ranging Experiment of the Lunar Reconnaissance Orbiter: Five Years of Operations and Data Analysis." Icarus 283 55-69 [10.1016/j.icarus.2016.07.003]

    Smith, D. E., M. T. Zuber, G. A. Neumann, et al. E. Mazarico, F. G. Lemoine, J. W. Head, P. G. Lucey, O. Aharonson, M. S. Robinson, X. Sun, M. H. Torrence, M. K. Barker, J. Oberst, T. C. Duxbury, D. Mao, O. S. Barnouin, K. Jha, D. D. Rowlands, S. Goossens, D. M. Hollibaugh Baker, S. Bauer, P. Gläser, M. Lemelin, M. Rosenburg, M. M. Sori, J. Whitten, and T. Mcclanahan. 2017. "Summary of the Results from the Lunar Orbiter Laser Altimeter after Seven Years in Lunar Orbit." Icarus 283 70-91 [10.1016/j.icarus.2016.06.006]

    Barker, M. K., X. Sun, E. Mazarico, et al. G. A. Neumann, M. T. Zuber, and D. E. Smith. 2016. "Lunar phase function at 1064 nm from Lunar Orbiter Laser Altimeter passive and active radiometry." Icarus 273 96–113 [10.1016/j.icarus.2016.02.008]

    Prochazka, I., J. Kodet, J. Blazej, and X. Sun. 2015. "Radiation-resistant photon-counting detector package providing sub-ps stability for laser time transfer in space." Journal of Modern Optics 62 (20): 1703-1708 [10.1080/09500340.2015.1076078]

    Sun, X., and G. A. Neumann. 2014. "Calibration of the Mercury Laser Altimeter on the MESSENGER Spacecraft." IEEE Transactions on Geoscience and Remote Sensing 53 (5): 2860-2874 [10.1109/TGRS.2014.2366080]

    Neumann, G. A., J. F. Cavanaugh, X. Sun, et al. E. M. Mazarico, D. E. Smith, M. T. Zuber, D. Mao, D. A. Paige, S. C. Solomon, C. M. Earnst, and O. S. Barnouin. 2013. "Bright and Dark Polar Deposits on Mercury: Evidence for Surface Volatiles." Science 339 (6117): 296-300 [Full Text (Link)] [10.1126/science.1229764]

    Sun, X., D. R. Skillman, E. D. Hoffman, et al. D. Mao, J. F. McGarry, L. McIntire, R. S. Zellar, F. M. Davidson, W. H. Fong, M. A. Krainak, G. A. Neumann, M. T. Zuber, and D. E. Smith. 2013. "Free space laser communication experiments from Earth to the Lunar Reconnaissance Orbiter in lunar orbit." Optics Express 21 (2): 1865 [10.1364/oe.21.001865]

    Sun, X., J. B. Abshire, J. F. McGarry, et al. G. A. Neumann, D. Smith, J. F. Cavanaugh, D. J. Harding, H. J. Zwally, and D. E. Smith. 2013. "Space lidar developed at the NASA Goddard Space Flight Center - the first 20 years." IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 6 (3): 1660-1675 [doi:10.1109/jstars.2013.2259578]

    Zuber, M. T., D. E. Smith, R. Phillips, et al. S. Solomon, G. A. Neumann, S. Hauck, S. Peale, O. Barnouin, J. Head, C. C. Johnson, F. G. Lemoine, E. M. Mazarico, X. Sun, M. H. Torrence, A. Freed, C. Klimczak, J. Margot, J. Oberst, M. A. Perry, C. Ernst, R. McNutt, J. Balcerski, N. Michel, M. Talpe, and D. Yang. 2012. "Topography of the Northern Hemisphere of Mercury from MESSENGER Laser Altimetry." Science 336 (6078): 217-220 [Full Text (Link)] [10.1126/science.1218805]

    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]

    Zuber, M. T., D. E. Smith, R. S. Zellar, et al. G. A. Neumann, X. Sun, R. Katz, I. Kleyner, A. Matuszeski, J. L. Mcgarry, M. Ott, L. A. Ramos-Izquierdo, D. D. Rowlands, M. H. Torrence, and T. W. Zagwodzki. 2010. "The Lunar Reconnaissance Orbiter Laser Ranging Investigation." Space Science Reviews 150 (1-4): 63-80 [10.1007/s11214-009-9511-z]

    Kawa, S., J. Mao, J. Abshire, et al. G. Collatz, X. Sun, and C. Weaver. 2010. "Simulation studies for a space-based CO2 lidar mission." Tellus B 62 (5): 759-769 [10.1111/j.1600-0889.2010.00486.X]

    Smith, D. E., M. T. Zuber, G. A. Neumann, et al. F. G. Lemoine, E. M. Mazarico, M. H. Torrence, J. L. Mcgarry, D. D. Rowlands, J. Head, T. Duxbury, O. Aharonson, P. Lucey, M. Robinson, O. Barnouin, J. Cavanaugh, X. Sun, P. M. Liiva, D. Mao, J. Smith, and A. Bartels. 2010. "Initial observations from the Lunar Orbiter Laser Altimeter (LOLA)." Geophys. Res. Lett. 37 [Full Text (Link)] [10.1029/2010GL043751]

    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

    Cavanaugh, J. F., J. C. Smith, X. Sun, et al. A. E. Bartels, L. Ramos-Izquierdo, D. J. Krebs, J. F. McGarry, R. Trunzo, A. M. Novo-Gradac, J. L. Britt, J. Karsh, R. B. Katz, A. T. Lukemire, R. Szymkiewicz, D. L. Berry, J. P. Swinski, G. A. Neumann, M. T. Zuber, and D. E. Smith. 2007. "The Mercury Laser Altimeter Instrument for the MESSENGER Mission." Space Science Reviews 131 (1-4): 451-479 [10.1007/s11214-007-9273-4]

    Smith, D. E., M. T. Zuber, X. Sun, et al. G. A. Neumann, J. F. Cavamaugh, J. L. Mcgarry, and T. W. Zagwodzki. 2006. "Two-Way Laser Link over Interplanetary Distance." Science 311 (5757): 53-53 [10.1126/science.1120091]

    Sun, X., G. A. Neumann, J. B. Abshire, and M. T. Zuber. 2006. "Mars 1064 nm spectral radiance measurements determined from the receiver noise response of the Mars Orbiter Laser Altimeter." Applied Optics IP, vol 45, Issue 17, pp3960-3971 45 3960 [Full Text (Link)] [10.1364/AO.45.003960]

    Yi, D., H. J. Zwally, and X. Sun. 2005. "ICESat Measurement of Greenland Ice Sheet Surface Slope and Roughness." Annals of Glaciology 42 83-89

    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]

    Neumann, G. A., J. B. Abshire, O. Aharonson, et al. J. B. Garvin, X. Sun, and M. T. Zuber. 2003. "Mars Orbiter Laser Altimeter pulse width measurements and footprint-scale roughness." Geophysical Research Letters 30 (11): 1561 [10.1029/2003GL017048]

    Smith, D. E., M. T. Zuber, H. V. Frey, et al. J. B. Garvin, J. W. Head, D. O. Muhleman, G. H. Pettengill, R. J. Phillips, S. C. Solomon, H. J. Zwally, W. B. Banerdt, T. C. Duxbury, M. P. Golombek, F. G. Lemoine, G. A. Neumann, D. D. Rowlands, O. Aharonson, P. G. Ford, A. B. Ivanov, C. L. Johnson, P. J. McGovern, J. B. Abshire, R. S. Afzal, and X. Sun. 2001. "Mars Orbiter Laser Altimeter: Experiment summary after the first year of global mapping of Mars ." J. Geophysical Research-Planets 106 (E10): 23689-23722 [Full Text (Link)] [10.1029/2000JE001364]

    Abshire, J. B., X. Sun, and R. S. Afzal. 2000. "Mars Orbiter Laser Altimeter: Receiver Model and Performance Analysis." Applied Optics LP, vol 39, Issue 15, pp2449-2460 39 2449 [Full Text (Link)] [10.1364/AO.39.002449]

    Non-Refereed

    Sandford, M., P. G. Lucey, X. Sun, and D. Cremons. 2018. "A spectrographic receiver for laser spectrometers." Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques and Applications VII 10780 [10.1117/12.2324818]

    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]

    Hubbs, J. E., X. Sun, J. B. Abshire, et al. J.-M. Lauenstein, W. Sullivan, and J. Beck. 2018. "Evaluation of space radiation effects on HgCdTe avalanche photodiode arrays for Lidar applications." Infrared Technology and Applications XLIV [10.1117/12.2304601]

    Sun, X., J. B. Abshire, M. A. Krainak, et al. J. Beck, W. W. Sullivan, P. Mitra, D. Rawlings, W. Lu, R. A. Fields, D. A. Hinkley, and B. Hirasuna. 2018. "Single photon HgCdTe avalanche photodiode and integrated detector cooler assemblies for space lidar applications." Advanced Photon Counting Techniques XII [10.1117/12.2305017]

    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]

    Mcgarry, J. L., D. Mao, E. Mazarico, et al. G. A. Neumann, X. Sun, M. H. Torrence, M. K. Barker, E. D. Hoffman, J. E. Horvath, D. E. Smith, and M. T. Zuber. 2016. "The Contributions of ILRS Laser Ranging to the Lunar Reconnaissance Orbiter Mission." 20th International Workshop on Laser Ranging, Potsdam Germany, October 9-14, 2016 [Full Text (Link)]

    Shappirio, M., J. L. Mcgarry, J. L. Bufton, et al. J. W. Cheek, D. B. Coyle, S. M. Hull, P. R. Stysley, X. Sun, R. P. Young, and T. W. Zagwodzki. 2016. "Application of Satellite Laser Ranging Techniques for Space Situational Awareness Efforts." Proceedings of the Advanced Maui Optical and Space Surveillance Technologies Conference, Wailea, Maui, Hawaii, September 20-23, 2016, [Full Text (Link)]

    Sullivan, W., J. Beck, R. Scritchfield, et al. M. Skokan, P. Mitra, X. Sun, J. Abshire, D. Carpenter, and B. Lane. 2015. "Linear mode photon counting from visible to MWIR with HgCdTe avalanche photodiode focal plane arrays." Advanced Photon Counting Techniques IX [10.1117/12.2180394]

    Yu, A. W., X. Sun, S. X. Li, J. F. Cavanaugh, and G. A. Neumann. 2014. "In-flight performance of the Mercury Laser Altimeter laser transmitter." Solid State Lasers XXIII: Technology and Devices [10.1117/12.2041452]

    Sun, X., J. F. Cavanaugh, J. C. SMith, et al. J. B. Abshire, J. L. Mcgarry, G. A. Neumann, D. J. Harding, H. J. Zwally, D. E. Smith, and M. T. Zuber. 2013. "SPACE LIDARS DEVELOPED AT NASA GSFC." IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING (JSTARS) 6 (3): 1660 - 1675 [ 10.1109/JSTARS.2013.2259578]

    Sun, X., D. R. Skillman, E. D. Hoffman, et al. D. Mao, J. L. Mcgarry, G. A. Neumann, L. McIntire, R. S. Zellar, F. M. Davidson, W. H. Fong, M. A. Krainak, M. T. Zuber, and D. E. Smith. 2013. "Simultaneous Laser Ranging and Communication from an Earth-Based Satellite Laser Ranging Station to the Lunar Reconnaissance Orbiter in Lunar Orbit.”." Proceedings of the SPIE XXV Conference on Free-Space Laser Communication and Atmospheric Propagation [10.1117/12.2006645]

    Yu, A. W., M. A. Krainak, D. J. Harding, et al. J. B. Abshire, X. Sun, L. Ramos-Izquierdo, J. Cavanaugh, S. Valett, T. Winkert, M. Plants, C. Kirchner, B. Kamamia, R. Faulkner, P. Dogoda, W. Hasselbrack, and T. Filemyr. 2013. "A 16-beam non-scanning swath mapping laser altimeter instrument." Solid State Lasers XXII: Technology and Devices, Proceedings of SPIE 8599 [10.1117/12.2005651]

    Sun, X., J. F. Cavanaugh, G. A. Neumann, D. E. Smith, and M. T. Zuber. 2012. "Mapping Mercury Topography by Laser – Performance of the Mercury Laser Altimeter on the MESSENGER Spacecraft." SPIE Newsroom 3 [10.1117/2.1201210.004489]

    Yu, A. W., M. A. Krainak, D. J. Harding, et al. J. B. Abshire, X. Sun, J. Cavanaugh, S. Valett, and L. Ramos-Izquierdo. 2012. "Multi-beam Laser Altimeter System Simulator for the Lidar Surface Topography (LIST) Mission." 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) [Full Text (Link)] [10.1364/CLEO_AT.2012.ATu2G.6]

    Yu, A. W., M. A. Krainak, D. J. Harding, et al. J. B. Abshire, X. Sun, J. Cavanaugh, S. Valett, L. Ramos-Izquierdo, T. Winkert, C. Kirchner, M. Plants, T. Filemyr, B. Kamamia, W. Hasselbrack, and P. Dogoda. 2011. "Development effort of the airborne lidar simulator for the lidar surface topography (LIST) mission." Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VII, Proceedings of SPIE 8182 [10.1117/12.898545]

    Yu, A. W., M. A. Krainak, D. J. Harding, et al. J. B. Abshire, X. Sun, S. Valett, J. Cavanaugh, and L. Ramos-Izquierdo. 2010. "Spaceborne laser instruments for high-resolution mapping." Solid State Lasers XIX: Technology and Devices, Proceedings of SPIE 7578 [10.1117/12.843191]

    Yu, A. W., M. A. Krainak, D. J. Harding, J. B. Abshire, and X. Sun. 2010. "A Spaceborne lidar for high resolution topographic mapping of the Earths surface." SPIE Newsroom [10.1117/2.1201002.002655]

    Dabney, P. W., D. J. Harding, J. B. Abshire, et al. T. E. Huss, G. F. Jodor, R. L. Machan, J. Marzouk, K. Rush, A. Seas, C. A. Shuman, X. Sun, S. Valett, A. Vasilyev, A. Yu, and Y. Zheng. 2010. "The Slope Imaging Multi-polarization Photon-counting Lidar: Development and performance results." Geoscience and Remote Sensing Symposium (IGARSS), 2010 IEEE International 653-656 [10.1109/IGARSS.2010.5650862]

    Sun, X., G. A. Neumann, J. Cavanaugh, et al. J. L. Mcgarry, D. E. Smith, and M. T. Zuber. 2009. "Laser Altimeter Measurements from MESSENGER's Recent Mercury Flybys." 2009 Conference on Lasers and Electro-Optics and Quantum Electronics and Laser Science 116-117 [Full Text (Link)]

    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]

    Krainak, M. A., J. R. Chen, P. W. Dabney, et al. J. F. Ferrara, W. H. Fong, A. J. Martino, J. F. McGarry, S. M. Merkowitz, C. M. Principe, X. Sun, and T. W. Zagwodzki. 2008. "Direct-detection free-space laser transceiver test-bed." Proceedings of the Free-Space Laser Communication Technologies XX SPIE.6877 687703 [10.1117/12.758654]

    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., D. J. Harding, X. Sun, et al. M. A. Krainak, T. Seas, and P. Dabney. 2007. "Pushbroom Laser Altimetry using Fiber Lasers and Photon Counting Detectors ." 2007 Conference on Lasers & Electro-Optics/Quantum Electronics and Laser Science Conference (CLEO/QELS 1-5 1467-1468 [Full Text (Link)]

                                                                                                                                                                                            
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