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Found 38 results
Author [ Title(Desc)] Type Year
Filters: Type is Presentation and Author is T. Choi  [Clear All Filters]
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A
Xiong, X., A. Angal, S. Madhavan, T. Choi, J. Dodd, X. Geng, Z. Wang, G. Toller, and W. Barnes, "Aqua MODIS 8-year on-orbit operation and calibration", Proceedings of SPIE – Sensors, Systems, and Next-Generation Satellites XIV, vol. 7826, no. 78261X, 2010.
Chander, G., X. Xiong, A. Angal, and T. Choi, An Assessment of African Test Sites in the Context of a Global Network of Quality-Assured Reference Standards, 2009.
Chander, G., X. Xiong, T. Choi, and A. Angal, An Assessment of Pseudo-Invariant CEOS Reference Standard Test Sites for Stability Monitoring, 2009.
Choi, T., X. Xiong, G. Chander, and A. Angal, Assessment of the Short-term Radiometric Stability Between Terra MODIS and Landsat 7 ETM+ Sensors, 2009.
C
Geng, X., A. Angal, J. Sun, A. Wu, T. Choi, and X. Xiong, "Characterization of MODIS mirror side difference in the reflective solar spectral region", Proceedings of SPIE – Earth Observing Systems XVI, vol. 8153, no. 81531O, 2011.
Chander, G., X. Xiong, A. Angal, and T. Choi, "Comparing the on-orbit radiometric stability of the IRS-P6 AWiFS & CBERS-2/2B CCD sensors with the Landsat 7 ETM+ & Terra MODIS sensors, Sensors, Systems, and Next-Generation Satellites XIII", Proc. SPIE, vol. 7474, no. 74740Z, 2009.
Xiong, X., J. Sun, N. Che, T. Choi, and A. Angal, "Comparison of Terra and Aqua MODIS VIS Bands On-orbit Response", Proc. IEEE International Geoscience and Remote Sensing Symposium, vol. 4, pp. IV-1348-1351, 2008.
Chander, G., A. Angal, T. Choi, D. Meyer, X. Xiong, and P. M. Teillet, "Cross-calibration of the Terra MODIS, Landsat-7 ETM+ and EO-1 ALI sensors using near simultaneous surface observation over Railroad Valley Playa, Nevada, test site, Earth Observing Systems XII", Proc. SPIE, vol. 6677, no. 66770Y, 2007.
L
Sun, J., A. Angal, H. Chen, X. Geng, T. Choi, M. Chu, and X. Xiong, "Long-term Calibration Performance of MODIS Reflective Solar Bands", Proceedings of CALCON, 2012.
M
Che, N., T. Choi, and X. Xiong, "MODIS Along-scan Direction Line Spread Function (LSF) Modeling and Verification Using the Integration and Alignment Collimator (IAC), Earth Observing Systems XIII", Proc. SPIE, vol. 7081, no. 708109, 2008.
Wenny, B., J. Sun, X. Xiong, A. Wu, H. Chen, A. Angal, T. Choi, N. Che, S. Madhavan, X. Geng, et al., "MODIS Calibration Algorithm Improvements Developed for Collection 6 Level-1B", Proceedings of SPIE – Poster Session, vol. 7807, no. 78071F, 2010.
Sun, J., A. Angal, X. Xiong, H. Chen, X. Geng, A. Wu, T. Choi, and M. Chu, "MODIS RSB calibration improvements in Collection 6", Proc. SPIE 8528, Earth Observing Missions and Sensors: Development, Implementation and Characterization II, 85280N, 2012.
Xiong, X., A. Angal, H. Chen, T. Choi, and J. Sun, MODIS Solar Diffuser On-orbit Performance, 2008.
Chander, G., T. Choi, A. Angal, and X. Xiong, Monitoring On-orbit Radiometric Stability of the Terra MODIS and Landsat 7 ETM+ Sensors Using Pseudo-invariant test Sites, 2008.
Angal, A., T. Choi, G. Chander, and X. Xiong, "Monitoring On-orbit Stability of the Terra MODIS and Landsat 7 ETM+ Reflective Solar Bands Using the Railroad Valley Playa, Nevada (RVPN) Test Site", Proc. IEEE International Geoscience and Remote Sensing Symposium, vol. 4, pp. IV-1364-1367, 2008.
Chander, G., A. Sampath, A. Angal, T. Choi, and X. Xiong, "Monitoring the long term stability of the IRS-P6 AWiFS sensor using the Sonoran and RVPN sites", Proceedings of SPIE – Earth Observing Missions and Sensors: Development, Implementation, and Characterization, vol. 7862, no. 78620K, 2010.
O
Choi, T., N. Che, and X. Xiong, "On-orbit Aqua MODIS Modulation Transfer Function Trending in Along-Scan from the Spectro-Radiometric Calibration Assembly, Earth Observing Systems XIII", Proc. SPIE, vol. 7081, no. 70810A, 2008.
Chu, M., J. Sun, A. Angal, H. Chen, X. Geng, T. Choi, and X. Xiong, "On-orbit calibration performance of MODIS TDI bands ", Proc. SPIE 8866, Earth Observing Systems XVIII, 886605, 2013.
Choi, T., N. Che, and X. Xiong, On-orbit MODIS Modulation Transfer Function Trending Along-Scan from the Spectro-Radiometric Calibration Assembly, 2007.
Wang, Z., T. Choi, and X. Xiong, "On-orbit modulation transfer function characterization of terra MODIS using the moon", Proceedings of SPIE – Earth Observing Systems XVI, vol. 8153, no. 81531N, 2011.
Xiong, X., A. Angal, T. Choi, J. Sun, and E. Johnson, "On-orbit performance of MODIS solar diffuser stability monitor", Proceedings of SPIE- Earth Observing Systems XVII, vol. 8510, issue 85100H, 2012.
Xiong, X., B. N. Wenny, J. Sun, A. Angal, A. Wu, H. Chen, T. Choi, S. Madhavan, X. Geng, D. Link, et al., "Overview of Aqua MODIS 10-year on-orbit calibration and performance", Proc. SPIE 8533, Sensors, Systems, and Next-Generation Satellites XVI, 853316, 2012.
Angal, A., H. Chen, T. Choi, X. Geng, J. Sun, B. N. Wenny, and X. Xiong, "An overview of MODIS RSB Calibration and the Look-up-table delivery process", Proc. SPIE 8528, Earth Observing Missions and Sensors: Development, Implementation and Characterization II, 85280L, 2012.
P
Chander, G., A. Angal, X. Xiong, D. L. Helder, N. Mishra, T. Choi, and A. Wu, "Preliminary assessment of several parameters to measure and compare usefulness of the CEOS reference pseudo-invariant calibration sites", Proceedings of SPIE – Sensors, Systems, and Next-Generation Satellites XIV, vol. 7826, no. 78262L, 2010.
R
Choi, T., A. Angal, G. Chander, and X. Xiong, "Radiometric Cross-calibration of the Terra MODIS and Landsat 7 ETM+ Using an Invariant Desert Site, Earth Observing Systems XIII", Proc. SPIE, vol. 7081, no. 708110, 2008.
Xiong, X., T. Choi, N. Che, Z. Wang, J. Dodd, and Y. Xie, "Results and lessons from a decade of Terra MODIS on-orbit spectral characterization", Proceedings of SPIE – Earth Observing Missions and Sensors: Development, Implementation, and Characterization, vol. 7862, no. 78620M, 2010.
Xiong, X., J. Sun, A. Angal, Y. Xie, T. Choi, and Z. Wang, "Results of MODIS band-to-band registration characterization using on-orbit lunar observation", Proceedings of SPIE – Earth Observing Systems XVI, vol. 8153, no. 81531R, 2011.
S
Choi, T., X. Xiong, A. Angal, and G. Chander, "Simulation of the long term radiometric responses of the Terra MODIS and EO-1 ALI using Hyperion spectral responses over Railroad Valley Playa in Nevada (RVPN)", Proceedings of SPIE – Earth Observing Missions and Sensors: Development, Implementation, and Characterization, vol. 7862, no. 78620H, 2010.
Choi, T., X. Xiong, A. Angal, and G. Chander, "Spectral stability of the Libya 4 site using EO-1 Hyperion", Proc. SPIE 8724: Ocean Sensing and Monitoring V 872410, 2013.
Xiong, X., A. Angal, S. Madhavan, T. Choi, B. Wenny, J. Sun, A. Wu, H. Chen, and V. Salomonson, "Status of Aqua MODIS Instrument On-orbit Operation and Calibration", AGU 2011, San Francisco, CA Dec 5-9, 2011.
Xiong, X., B. Wenny, J. Sun, A. Angal, A. Wu, H. Chen, X. Geng, T. Choi, S. Madhavan, D. Link, et al., "Status of MODIS on-orbit calibration and characterization", Proc. SPIE 8889, Sensors, Systems, and Next-Generation Satellites XVII, 88890U , 2013.
Xiong, X., B. Wenny, J. Sun, A. Wu, H. Chen, X. Geng, T. Choi, S. Madhavan, and V. Salomonson, "Status of Terra and Aqua MODIS Instrument Operation and Calibration", Proceedings of the AGU, 2013.
T
Choi, T., X. Xiong, Z. Wang, and D. Link, "Terra and Aqua MODIS on-orbit spectral characterization for reflective solar bands ", Proc. SPIE 8724: Ocean Sensing and Monitoring V 87240Y, 2013.
U
Chander, G., N. Mishra, D. L. Helder, D. Aaron, T. Choi, A. Angal, and X. Xiong, "Use of EO-1 Hyperion Data to Calculate Spectral Band Adjustment Factors (SBAF) between the L7 ETM+ and Terra MODIS Sensors", IEEE, pp. 1667-1670, 2010.
Angal, A., G. Chander, T. Choi, A. Wu, and X. Xiong, "The use of the Sonoran Desert as a Pseudo-invariant Site for Optical Sensor Cross-Calibration and Long-Term Stability Monitoring", IEEE, pp. 1656-1659, 2010.
Angal, A., S. A. Kumar, X. Xiong, K. A. S. Kumar, V. K. Dadhwal, and T. Choi, "Using CEOS reference standard targets to assess the on-orbit performance of Resourcesat-2 AWiFS in comparison with Terra MODIS", Proc. SPIE 8528, Earth Observing Missions and Sensors: Development, Implementation and Characterization II, 85280K, 2012.
Angal, A., X. Xiong, G. Chander, T. Choi, and A. Wu, "Using the Pseudo-Invariant CEOS Reference Standard Test Sites for Calibration Stability Monitoring", Proceedings of CALCON 2010, 2010.
Angal, A., T. Choi, G. Chander, A. Wu, and X. Xiong, "Using the Sonoran Desert test site to track the long-term radiometric stability of the Landsat TM/ETM+ and MODIS sensors, Atmospheric and Environmental Remote Sensing Data Processing and Utilization V: Readiness for GEOSS III", Proc. SPIE, vol. 7456, no. 745606, 2009.