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Publications

Found 148 results
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Filters: Author is A. Angal  [Clear All Filters]
2020
Wilson, T., E. Aldoretta, A. Angal, X. Geng, K. Twedt, and X. Xiong, "Analysis of the on-orbit responseversus-scan-angle for the MODIS SWIR bands derived from lunar observations", Proc. of SPIE - Sensors, Systems, and Next-Generation Satellites XXIV, vol. 11530, pp. 115301E, 2020.
Wu, A., Q. Mu, A. Angal, and X. Xiong, "Assessment of MODIS and VIIRS calibration consistency for reflective solar bands calibration using vicarious approaches", Proc. of SPIE - Sensors, Systems, and Next-Generation Satellites XXIV, vol. 11530, pp. 1153018, 2020.
Angal, A., X. Xiong, and A. Shrestha, "Cross-Calibration of MODIS Reflective Solar Bands With Sentinel 2A/2B MSI Instruments", IEEE Transactions on Geoscience and Remote Sensing, vol. 58, issue 7, pp. 5000-5007, 2020.
Twedt, K., A. Angal, and X. Xiong, "Effects of out-of-band and time-varying relative spectral response on the calibration of MODIS reflective solar bands", Journal of Applied Remote Sensing, issue 14 (2), pp. 024523, 2020.
Xiong, X., A. Angal, T. Chang, K. Chiang, N. Lei, Y. Li, J. Sun, K. Twedt, and A. Wu, "MODIS and VIIRS Calibration and Characterization in Support of Producing Long-Term High-Quality Data Products", Remote Sensing, vol. 12, issue 19, pp. 3167, 2020.
Mu, Q., A. Angal, K. Twedt, A. Wu, and X. Xiong, "MODIS detector differences using deep convective clouds and desert targets", Proc. of SPIE - Sensors, Systems, and Next-Generation Satellites XXIV, vol. 11530, pp. 115301A, 2020.
Sun, J., X. Xiong, A. Angal, and T. Wilson, "MODIS reflective solar bands lunar calibration update and improvements", Proc. of SPIE - Sensors, Systems, and Next-Generation Satellites XXIV, vol. 11530, pp. 115301C, 2020.
Aldoretta, E., A. Angal, K. Twedt, H. Chen, Y. Li, D. Link, Q. Mu, K. Vermeesch, and X. Xiong, " The MODIS RSB calibration and look-up table delivery process for collection 6 and 6.1", Proc. SPIE - Earth Observing Systems XXV, vol. 11501, pp. 115011Q, 2020.
Angal, A., X. Geng, X. Xiong, K. Twedt, A. Wu, D. Link, and E. Aldoretta, "On-Orbit Calibration of Terra MODIS VIS Bands Using Polarization-Corrected Desert Observations", IEEE Transactions on Geoscience and Remote Sensing, vol. 58, issue 8, pp. 5428-5439, 2020.
Wilson, T., A. Angal, and X. Xiong, "Orbital Path and Spacecraft Attitude Correction for the MODIS Lunar Spatial Characterization", IEEE Transactions on Geoscience and Remote Sensing, vol. 58, issue 2, pp. 1063-1073, 2020.
Bhatt, R., D. R. Doelling, A. Angal, X. Xiong, C. O. Haney, B. Scarino, A. Wu, and A. Gopalan, "Response Versus Scan-Angle Assessment of MODIS Reflective Solar Bands in Collection 6.1 Calibration", IEEE Transactions on Geoscience and Remote Sensing, vol. 58, issue 4, pp. 2276-2289, 2020.
Xiong, X., E. Aldoretta, A. Angal, T. Chang, X. Geng, D. Link, V. Salomonson, K. Twedt, and A. Wu, "Terra MODIS: 20 years of on-orbit calibration and performance", Journal of Applied Remote Sensing, vol. 14(3), pp. 037501, 2020.
2019
Twedt, K. A., A. Angal, H. Chen, and X. Xiong, "Comparison of MODIS solar diffuser stability monitor calibration results for different operational configurations", Proc. SPIE 11127, Earth Observing Systems XXIV, vol. 11127, pp. 1112728, 2019.
Raut, B., M. Kaewmanee, A. Angal, X. Xiong, and D. Helder, "Empirical Absolute Calibration Model for Multiple Pseudo-Invariant Calibration Sites", Remote Sensing, vol. 11, issue 9, pp. 1105, 2019.
Geng, X., A. Angal, Y. Li, K. Twedt, and X. Xiong, "Improvements in the on-orbitresponse versus scan-anglecharacterization for the MODISocean color bands", Proc. SPIE 11151, Sensors, Systems, andNext-Generation Satellites XXIII, no. 115124, 2019.
Xiong, X., A. Angal, K. A. Twedt, H. Chen, D. Link, X. Geng, E. Aldoretta, and Q. Mu, "MODIS Reflective Solar Bands On-Orbit Calibration and Performance", IEEE Transactions on Geoscience and Remote Sensing, vol. 57, issue 9, pp. 6355-6371, 2019.
Tuli, F., C. Pinto, A. Angal, X. Xiong, and D. Helder, "New Approach for Temporal Stability Evaluation of Pseudo-Invariant Calibration Sites (PICS)", Remote Sensing, vol. 11, issue 12, pp. 1502, 2019.
Chang, T., X. Xiong, and A. Angal, "Terra and Aqua MODIS TEB intercomparison using Himawari-8/AHI as reference", Journal of Applied Remote Sensing, vol. 13, issue 1, pp. 017501, 2019.
Xiong, X., E. Aldoretta, A. Angal, T. Chang, X. Geng, D. Link, V. Salomonson, K. Twedt, and A. Wu, "Terra MODIS: 20 years of on-orbit calibration and performance", Proc. SPIE 11127, Earth Observing Systems XXIV, vol. 11127, pp. 1112714, 2019.
2018
Shrestha, A., A. Angal, and X..Xiong, "Evaluation of MODIS and Sentinel-3 SLSTR thermal emissive bands calibration consistency using Dome C", Proc. SPIE - Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV, vol. 10644, pp. 106441U, 2018.
Mu, Q., A. Angal, X. Geng, A. Wu, and X. Xiong, "Evaluation of the on-orbit response versus scan-angle (RVS) performance for the MODIS reflective solar bands using multiple ground targets", Proc. SPIE - Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXIV, vol. 10644, pp. 106441X, 2018.
Angal, A., X. Xiong, A. Wu, X. Geng, and H. Chen, "Improvements in the On-Orbit Response Versus Scan Angle Characterization of the Aqua MODIS Reflective Solar Bands", IEEE Transactions on Geoscience and Remote Sensing, vol. 56, issue 3, pp. 1728-1738, 2018.
Angal, A., X. Xiong, Q. Mu, D. R. Doelling, R. Bhatt, and A. Wu, "Results From the Deep Convective Clouds-Based Response Versus Scan-Angle Characterization for the MODIS Reflective Solar Bands", IEEE Transactions on Geoscience and Remote Sensing, vol. 56, issue 2, pp. 1115-1128, 2018.
Xiong, X., A. Angal, W. L. Barnes, H. Chen, V. Chiang, X. Geng, Y. Li, K. Twedt, Z. Wang, T. Wilson, et al., "Updates of Moderate Resolution Imaging Spectroradiometer on-orbit calibration uncertainty assessments", Journal of Applied Remote Sensing, vol. 12(3),034001, 2018.
2017
Xiong, X., A. Angal, A. Wu, Z. Wang, W. Barnes, and V. Salomonson, "15 Years of Aqua MODIS OnOrbit Operation, Calibration, and Performance", IEEE 2017 International Geoscience & Remote Sensing Symposium, pp. 4695-4698, 2017.
Chang, T., X. Xiong, A. Angal, A. Wu, and X. Geng, "Aqua and Terra MODIS RSB Calibration Comparison Using BRDF Modeled Reflectance", IEEE Transactions on Geoscience and Remote Sensing, vol. 55, issue 4, pp. 2288 - 2298, 2017.
Xiong, X., A. Angal, D. Link, and A. Wu, "Assessment of MODIS reflective solar bands calibration stability", Proceedings Volume 10423, Sensors, Systems, and Next-Generation Satellites XXI; 1042318, 2017.
Wu, A., A. Angal, X. Geng, and X. Xiong, "Assessment of polarization correction impact on the calibration of Terra MODIS reflective solar bands", Proceedings Volume 10423, Sensors, Systems, and Next-Generation Satellites XXI; 104231C, 2017.
Wu, A., X. Geng, A. Wald, A. Angal, and X. Xiong, "Assessment of Terra MODIS On-Orbit Polarization Sensitivity Using Pseudoinvariant Desert Sites", IEEE Transactions on Geoscience and Remote Sensing, vol. 55, issue 7, pp. 4168 - 4176, 2017.
Bhatt, R., D. R. Doelling, A. Angal, X. Xiong, B. Scarino, A. Gopalan, C. O. Haney, and A. Wu, "Characterizing response versus scan- angle for MODIS reflective solar bands using deep convective clouds", Journal of Applied Remote Sensing, vol. 11 (1), 016014, 2017.
Wilson, T., A. Angal, A. Shrestha, and X. Xiong, "Lunar calibration improvements for the short-wave infrared bands in Aqua and Terra MODIS", Proceedings Volume 10423, Sensors, Systems, and Next-Generation Satellites XXI; 1042313, 2017.
Twedt, K. A., A. Angal, X. Xiong, X. Geng, and H. Chen, "MODIS solar diffuser degradation at short-wave infrared band wavelengths", Proc. SPIE Earth Observing Systems XXII, vol. 10402, no. 104022K, 2017.
Angal, A., X. Xiong, and A. Wu, "Monitoring the On-Orbit Calibration of Terra MODIS Reflective Solar Bands Using Simultaneous Terra MISR Observations", IEEE Transactions on Geoscience and Remote Sensing, vol. 55, issue 3, pp. 1648-1659, 2017.
Chen, H., X. Xiong, A. Angal, and K. A. Twedt, "On-Orbit Characterization of the MODIS SDSM Screen for Solar Diffuser Degradation Estimation", IEEE Transactions on Geoscience and Remote Sensing, vol. 55, issue 11, pp. 6456-6467, 2017.
Mu, Q., A. Wu, X. Xiong, D. R. Doelling, A. Angal, T. Chang, and R. Bhatt, "Optimization of a Deep Convective Cloud Technique in Evaluating the Long-Term Radiometric Stability of MODIS Reflective Solar Bands", Remote Sensing, vol. 9 (6), issue 535, 2017.
Xiong, X., A. Angal, W. Barnes, H. Chen, V. Chiang, X. Geng, Y. Li, K. Twedt, Z. Wang, T. Wilson, et al., "Updates of MODIS on-orbit calibration uncertainty assessments", Proc. SPIE - Earth Observing Systems XXII, vol. 10402, no. 104020M, 2017.
2016
Chen, H., X. Xiong, A. Angal, X. Geng, and A. Wu, "Alternative method of on-orbit response-versus-scan-angle characterization for MODIS reflective solar bands", Journal of Applied Remote Sensing, vol. 10(2), 024004, 2016.
Mu, Q., A. Wu, T. Chang, A. Angal, D. Link, X. Xiong, D. R. Doelling, and R. Bhatt, "Assessment of MODIS on-orbit calibration using a deep convective cloud technique", Proc. SPIE 9972, Earth Observing Systems XXI, 997210, 2016.
Chang, T., X. Xiong, A. Angal, and Q. Mu, "Assessment of MODIS RSB detector uniformity using deep convective clouds", Journal of Geophysical Research: Atmospheres, vol. 121, issue 9, pp. 4783–4796, 2016.
Chang, T., X. Xiong, A. Angal, and A. Wu, "BRDF characterization and calibration inter-comparison between Terra MODIS, Aqua MODIS, and S-NPP VIIRS", Proc. SPIE 10000, Sensors, Systems, and Next-Generation Satellites XX, 100000Z, 2016.