National Aeronautics and Space Administration

2015

• James B. Abshire, Haris Riris, Graham Allan, Jeffrey Chen, Tony Yu, Bill Hasselbrack, Anand Ramanathan, Jianping Mao, and Michael Rodriguez,"Recent Progress in developing the CO2 Sounder Lidar as a candidate for the ASCENDS Mission," NASA Earth Science Technology Forum (ESTF2015) Pasadena CA, June 2015.
• James B. Abshire, Anand Ramanathan, Jianping Mao, Haris Riris, Graham R. Allan, William E. Hasselbrack, Jeffrey Chen, "Pulsed Lidar Measurements of Atmospheric CO2 Column Absorption in the ASCENDS 2013 and 2014 Airborne Campaigns," presentation at IWGGMS-11, Pasadena CA, June 2015.
• Anand K. Ramanathan, Jianping Mao, James B. Abshire, "High accuracy CO2 measurements with vertical information from a pulsed IPDA lidar using multiple wavelength sampling," presentation at IWGGMS-11, Pasadena CA, June 2015.
• Jianping Mao, Anand Ramanathan, James B. Abshire, S. Randy Kawa, Haris Riris, Graham R. Allan, William E. Hasselbrack, "Atmospheric CO2 Concentration Measurements with Clouds from Airborne Lidar Measurements during ASCENDS Science Campaigns," presentation at IWGGMS-11, Pasadena CA, June 2015.
• Anand Ramanathan, James B. Abshire, Graham R. Allan, William E. Hasselbrack, "Surface Reflectivity Measurements made by the CO2 Sounder on the ASCENDS 2013 and 2014 Airborne campaigns," presentation at IWGGMS-11, Pasadena CA, June 2015.
• Haris Riris, Michael Rodriguez, Lesley Ott, Scott Zaccheo, Jianping Mao, "Pulsed airborne lidar measurements of atmospheric optical depth using the Oxygen A-band at 765 nm," presentation at IWGGMS-11, Pasadena CA, June 2015.
• Haris Riris, Kenji Numata Stewart Wu, "A Methane Lidar for Greenhouse Gas Measurements," presentation at IWGGMS-11, Pasadena CA, June 2015.
• William Sullivan III, Jeffrey Beck, Richard Scritchfield, Mark Skokan, Pradip Mitra, Xiaoli Sun, James Abshire, Darren Carpenter, Barry Lane, "Linear-Mode HgCdTe Avalanche Photodiodes for Photon-Counting Applications", Journal of Electronic Materials, May 2015, doi: 10.1007/s11664-015-3824-3.
• A.K. Ramanathan, J. Mao, J. B. Abshire, and G. R. Allan (2015), Remote sensing measurements of the CO2 mixing ratio in the planetary boundary layer using cloud slicing with airborne lidar, Geophys. Res. Lett., 42, 2015, doi:10.1002/2014GL062749.
• Anthony W. Yu ; James B. Abshire ; Mark Storm ; Alexander Betin; "Laser amplifier development for IPDA Lidar measurements of CO2 from space," Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93420M (February 20, 2015); doi:10.1117/12.2080792.

2014

• J. Beck, M. Kinch, and X. Sun, "Update on linear mode photon counting with the HgCdTe e-APD," Optical Engineering, Vol. 53, No. 8, pp. 081906 1-6, 2014.
• X. Sun, J. B. Abshire, and J. D. Beck, "Using HgCdTe e-APD detector arrays with single photon sensitivity for space lidar," Advanced Photon Counting Techniques VIII, SPIE Sensing Technology + Applications, 2014, Paper number 91140K.
• X. Sun, M. A. Krainak, and J. B. Abshire, "Advanced photodetectors for space lidar," 2014 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Session on Space Lidar: Missions, Technologies and Observations, Paper TU2.05.05.
• James B. Abshire, Graham Allan, Anand Ramanathan, Haris Riris, Bill Hasselbrack, Jeffrey Chen, Kenji Numata, "Progress in developing the CO2 Sounder Lidar as a candidate for the ASCENDS Mission" NASA ESTO ESTF Conference, Leesburg VA, October 30, 2014. 
• Haris Riris, Kenji Numata, Stewart Wu, "A Compact Remote Sensing Lidar for High Resolution Measurements of Methane," NASA ESTO ESTF Conference, Leesburg VA, October 30, 2014.
• Xiaoli Sun, James B. Abshire, Jeffrey D.Beck, Renny Fields, "Linear Mode Photon Counting HgCdTe Avalanche Photodiode Performance and LMPC CubeSat Status, NASA ESTO ESTF Conference, Leesburg VA, October 29, 2014.
• Randy Kawa et al., "Observing System Simulations in Support of ASCENDS Requirements Definition," 10th International Workshop on Greenhouse Measurements from Space (IWGGMS-10), Noordwijk, The Netherlands, May 2014.
• James B. Abshire et al., "Atmospheric CO2 Column Concentrations Measured by Pulsed Lidar with High Accuracy in the ASCENDS 2011 and 2013 Airborne Campaigns,"10th International Workshop on Greenhouse Measurements from Space (IWGGMS-10), Noordwijk, The Netherlands, May 2014.
• Anand Ramanathan et al., "Multi-layer retrievals of atmospheric CO2 mixing ratio using multi-wavelength pulsed lidar measurements from aircraft," 10th International Workshop on Greenhouse Measurements from Space (IWGGMS-10), Noordwijk, The Netherlands, May 2014.
• Haris Riris et al., "A Methane IPDA Lidar using Optical Parametric Laser Technology," 10th International Workshop on Greenhouse Measurements from Space (IWGGMS-10), Noordwijk, The Netherlands, May 2014.
• J. Beck, T. Welch, P. Mitra, K. Reiff,  X. Sun, J. Abshire, “A highly sensitive multi-element HgCdTe e-APD detector for IPDA lidar applications,” J. Electron. Mater.,  Vol. 43, No. 8, pp. 2970-2977, 2014.
• Abshire, J.B.; Ramanathan, A.; Riris, H.; Mao, J.; Allan, G.R.; Hasselbrack, W.E.; Weaver, C.J.; Browell, E.V. "Airborne Measurements of CO2 Column Concentration and Range Using a Pulsed Direct-Detection IPDA Lidar," Remote Sensing 2014, 6, 443-469.

2013

• H. Riris, M. Rodriguez, G.R. Allan, W. Hasselbrack, J. Mao, M. Stephen, J. Abshire, "Pulsed airborne lidar measurements of atmospheric optical depth using the Oxygen A-band at 765 nm," Applied Optics, 52(25), 6369-6382 (2013).
• Anand Ramanathan, Jianping Mao, Graham R. Allan, Haris Riris, Clark J. Weaver, William E. Hasselbrack, Edward V. Browell, James B. Abshire, "Spectroscopic measurements of a CO2 absorption line in an open vertical path using an airborne lidar,"Applied Physics Letters, 103, 214102 (2013), DOI:http://dx.doi.org/10.1063/1.4832616
• J. Abshire, H. Riris, C. Weaver, J. Mao, G. Allan, W. Hasselbrack, and E. Browell, "Airborne measurements of CO2 column absorption and range using a pulsed direct-detection integrated path differential absorption lidar," Appl. Opt. 52, 4446-4461 (2013).
• X. Sun, X.; J.B. Abshire, J.F. McGarry, G.A. Neumann, J.C. Smith, J.F. Cavanaugh, H.J. Zwally, D.E. Smith, M.T. Zuber. "Space Lidar Developed at the NASA Goddard Space Flight Center - The First 20 Years," IEEE Journ. Selected Topics in Applied Earth Observations, Vol.6, 1660-1675 (2013).doi: 10.1109/JSTARS.2013.2259578
• J. Beck; J. McCurdy, M. Skokan, C. Kamilar, R. Scritchfield , T. Welch, P. Mitra, X. Sun, J. Abshire, K. Reiff; "A highly sensitive multi-element HgCdTe e-APD detector for IPDA lidar applications", Proc. SPIE 8739, Sensors and Systems for Space Applications VI, 87390V (2013); doi:10.1117/12.2018083.
• A. Amediek, Xiaoli Sun, J.B. Abshire, "Analysis of Range Measurements From a Pulsed Airborne CO2 Integrated Path Differential Absorption Lidar," IEEE Trans Geosci. Rem. Sensing, vol. PP, no.99, pp.1-7, 2012, doi: 10.1109/TGRS.2012.2216884.

2012

• X. Sun and J. Abshire, "Comparison of IPDA lidar receiver sensitivity for coherent detection and for direct detection using sine-wave and pulsed modulation," Opt. Express, Vol. 20, 21291-21304 (2012), http://dx.doi.org/10.1364/OE.20.021291.
• K. Numata, J. R. Chen, and S. T. Wu, "Precision and fast wavelength tuning of a dynamically phase-locked widely-tunable laser", Optics Express, Vol. 20, Issue 13, pp. 14234-14243 (2012)
• H. Riris, K. Numata, S. Li, S. Wu, A. Ramanathan, M. Dawsey, J. Mao, R. Kawa, and J. Abshire, "Airborne measurements of atmospheric methane column abundance using a pulsed integrated-path differential absorption lidar," Appl. Opt. 51, 8296-8305 (2012).

2011

• Seminar Presentation on Space Lidar for IEEE Photonics Meeting in April 2011
• J.B Abshire et al., "Pulsed airborne lidar measurements of CO2 column absorption", NASA ESTO ESTF-2011 Conference (2011), avail from: http://esto.nasa.gov/conferences/estf2011/papers/Abshire_ESTF2011.pdf
• K. Numata, J. Chen, S. Wu, J. Abshire, and M. Krainak, "Frequency stabilization of distributed-feedback laser diodes at 1572 nm for lidar measurements of atmospheric carbon dioxide," Appl. Opt. 50, 1047-1056 (2011).
• Haris Riris ; Michael D. Rodriguez ; Graham R. Allan ; William E. Hasselbrack ; Mark A. Stephen ; James B. Abshire; "Airborne lidar measurements of atmospheric pressure made using the oxygen A-band", Proc. SPIE 8159, 815909 (September 13, 2011); doi:10.1117/12.892021.

2010

• J. B. Abshire, H. Riris, G. R. Allan, C. J. Weaver, J. Mao, X. Sun, W. E. Hasselbrack, A. Yu, A. Amediek, Y. Choi, E. V. Browell, "A lidar approach to measure CO2 concentrations from space for the ASCENDS Mission", Proc. SPIE 7832, paper 78320D, November 2010, doi:10.1117/12.868567.
• Summary of 2010 work, presented at SPIE Remote Sensing Conference in Toulouse France
• Abshire, J. B., Riris, H., Allan, G. R., Weaver, C. J., Mao, J., Sun, X., Hasselbrack, W. E., Kawa, S. R. and Biraud, S., "Pulsed airborne lidar measurements of atmospheric CO2 column absorption". Tellus B, (2010) doi: 10.1111/j.1600-0889.2010.00502.x.
• Kawa, S., Mao, J., Abshire J., Collatz, G., Sun, X., Weaver, C. "Simulation studies for a space-based CO2 lidar mission", Tellus B, 62, Dec. 2011.
• Overview of ESTO-IIP sponsored work, presented at ESTF-2010 conference in Crystal City, VA
• Poster on 2009 airborne CO2 lidar measurements, presented at 2010 EGU conference
• Poster on Ascends-mission related work, presented at 2010 EGU conference

2009

• Overview of 2009 airborne CO2 lidar measurements, presented at the Fall AGU meeting, December 2009