Amit Angal

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Amit Angal

  • 301.867.2041
  • NASA/GSFC
  • Mail Code: 618
  • LANHAM , MD 20706
  • Employer: SCIENCE SYSTEMS AND APPLICATIONS INC
  • Current Projects

    Joint Polar-orbiting Satellite System (JPSS) Program

    Support the pre-flight characterization of the JPSS-2 and JPSS-3 VIIRS instruments

    MODIS Characterization Support Team

    On-orbit operation and characterization of the MODIS instruments onboard the Terra and Aqua satellites

    VIIRS Characterization Support Team

    On-orbit calibration of the Suomi NPP and NOAA-20 VIIRS instruments

    Awards

    2018 NOAA & NASA Group Achievement Award to the JPSS-1 Project Team for outstanding contributions to the successful launch and activation of the JPSS-1 Satellite

    2017 Hydrosphere, Biosphere and Geophysics HBG Annual Peer Award for Scientific/Technical Support

    2016 NASA Group Achievement Award (MODIS Characterization Support Team)

    2012 HOBI Group Achievement Award (MODIS Characterization Support Team and MODIS sensor Working Group)

    2005 USGS EROS Group Achievement Award for the successful implementation of an image assessment system for EO-1 ALI

    Selected Publications

    Refereed

    Xiong, X., A. Angal, K. A. Twedt, et al. H. Chen, D. Link, X. Geng, E. Aldoretta, and Q. Mu. 2019. "MODIS Reflective Solar Bands On-Orbit Calibration and Performance." IEEE Transactions on Geoscience and Remote Sensing, 57 (9): 6355 - 6371 [10.1109/TGRS.2019.2905792]

    Tuli, F. T., C. T. Pinto, A. Angal, X. Xiong, and D. Helder. 2019. "New Approach for Temporal Stability Evaluation of Pseudo-Invariant Calibration Sites (PICS)." Remote Sensing, 11 (12): 1502 [10.3390/rs11121502]

    Raut, B., M. Kaewmanee, A. Angal, X. Xiong, and D. Helder. 2019. "Empirical Absolute Calibration Model for Multiple Pseudo-Invariant Calibration Sites." Remote Sensing, 11 (9): 1105 [10.3390/rs11091105]

    Chang, T., X. Xiong, and A. Angal. 2019. "Terra and Aqua MODIS TEB intercomparison using Himawari-8/AHI as reference." Journal of Applied Remote Sensing, 13 (01): 1 [10.1117/1.jrs.13.017501]

    Oudrari, H., J. McIntire, X. Xiong, et al. J. Butler, Q. Ji, T. Schwarting, and A. Angal. 2018. "An Overall Assessment of JPSS-2 VIIRS Radiometric Performance Based on Pre-Launch Testing." Remote Sensing, 10 (12): 1921 [10.3390/rs10121921]

    Angal, A., X. Xiong, D. Helder, M. Kaewmanee, and L. Leigh. 2018. "Assessing the calibration differences in the reflective solar bands of Terra MODIS and Landsat-7 enhanced thematic mapper plus." Journal of Applied Remote Sensing, 12 (04): 1 [10.1117/1.jrs.12.044002]

    Xiong, X., A. Angal, W. L. Barnes, et al. H. Chen, V. Chiang, X. Geng, Y. Li, K. Twedt, Z. Wang, T. Wilson, and A. Wu. 2018. "Updates of Moderate Resolution Imaging Spectroradiometer on-orbit calibration uncertainty assessments." Journal of Applied Remote Sensing, 12 (03): 1 [10.1117/1.jrs.12.034001]

    Angal, A., X. Xiong, A. Wu, X. Geng, and H. Chen. 2018. "Improvements in the On-Orbit Response Versus Scan Angle Characterization of the Aqua MODIS Reflective Solar Bands." IEEE Transactions on Geoscience and Remote Sensing, 56 (3): 1728-1738 [10.1109/tgrs.2017.2767206]

    Angal, A., X. Xiong, Q. Mu, et al. D. R. Doelling, R. Bhatt, and A. Wu. 2018. "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, 56 (2): 1115-1128 [10.1109/tgrs.2017.2759660]

    Chen, H., X. Xiong, A. Angal, and K. A. Twedt. 2017. "On-Orbit Characterization of the MODIS SDSM Screen for Solar Diffuser Degradation Estimation." IEEE Transactions on Geoscience and Remote Sensing, 55 (11): 6456-6467 [10.1109/tgrs.2017.2728520]

    Mu, Q., A. Wu, X. Xiong, et al. D. Doelling, A. Angal, T. Chang, and R. Bhatt. 2017. "Optimization of a Deep Convective Cloud Technique in Evaluating the Long-Term Radiometric Stability of MODIS Reflective Solar Bands." Remote Sensing, 9 (6): 535 [10.3390/rs9060535]

    Wu, A., X. Geng, A. Wald, A. Angal, and X. Xiong. 2017. "Assessment of Terra MODIS On-Orbit Polarization Sensitivity Using Pseudoinvariant Desert Sites." IEEE Transactions on Geoscience and Remote Sensing, 55 (7): 4168-4176 [10.1109/tgrs.2017.2689719]

    Chang, T., X. Xiong, A. Angal, A. Wu, and X. Geng. 2017. "Aqua and Terra MODIS RSB Calibration Comparison Using BRDF Modeled Reflectance." IEEE Transactions on Geoscience and Remote Sensing, 55 (4): 2288-2298 [10.1109/tgrs.2016.2641258]

    Angal, A., X. Xiong, and A. Wu. 2017. "Monitoring the On-Orbit Calibration of Terra MODIS Reflective Solar Bands Using Simultaneous Terra MISR Observations." IEEE Transactions on Geoscience and Remote Sensing, 55 (3): 1648-1659 [10.1109/tgrs.2016.2628704]

    Bhatt, R., D. R. Doelling, A. Angal, et al. X. Xiong, B. Scarino, A. Gopalan, C. Haney, and A. Wu. 2017. "Characterizing response versus scan-angle for MODIS reflective solar bands using deep convective clouds." Journal of Applied Remote Sensing, 11 (1): 016014 [10.1117/1.jrs.11.016014]

    Chen, H., X. Xiong, A. Angal, X. Geng, and A. Wu. 2016. "Alternative method of on-orbit response-versus-scan-angle characterization for MODIS reflective solar bands." J. Appl. Remote Sens, 10 (2): 024004 [10.1117/1.jrs.10.024004]

    Chang, T., X. J. Xiong, A. Angal, and Q. Mu. 2016. "Assessment of MODIS RSB detector uniformity using deep convective clouds." J. Geophys. Res. Atmos., 121 (9): 4783-4796 [10.1002/2015jd024652]

    Xiong, X., M. D. King, V. V. Salomonson, et al. W. L. Barnes, B. N. Wenny, A. Angal, A. Wu, S. Madhavan, and D. O. Link. 2015. "Moderate Resolution Imaging Spectroradiometer on Terra and Aqua Missions." Qian/Optical Payloads for Space Missions, 53-89 [10.1002/9781118945179.ch3]

    Angal, A., X. Xiong, J. Sun, and X. Geng. 2015. "On-orbit noise characterization of MODIS reflective solar bands." Journal of Applied Remote Sensing, 9 (1): 094092 [10.1117/1.jrs.9.094092]

    Xiong, X., A. Angal, J. Sun, T. Choi, and E. Johnson. 2014. "On-orbit performance of MODIS solar diffuser stability monitor." J. Appl. Remote Sens, 8 (1): 083514 [10.1117/1.jrs.8.083514]

    Sun, J., X. Xiong, A. A. Angal, H. Chen, and X. Geng. 2014. "Time-Dependent Response Versus Scan Angle for MODIS Reflective Solar Bands." Geoscience and Remote Sensing, IEEE Transactions on , 52 (6): 3159-3174 [10.1109/TGRS.2013.2271448]

    Mishra, N., D. Helder, A. A. Angal, J. Choi, and X. Xiong. 2014. "Absolute Calibration of Optical Satellite Sensors Using Libya 4 Pseudo Invariant Calibration Site." Remote Sens., 6 (2): 1327-1346 [10.3390/rs6021327]

    Lyapustin, A. I., Y. Wang, X. Xiong, et al. G. Meister, S. E. Platnick, R. C. Levy, B. A. Franz, S. Korkin, T. Hilker, C. J. Tucker, F. G. Hall, P. J. Sellers, A. Wu, and A. A. Angal. 2014. "Scientific impact of MODIS C5 calibration degradation and C6+ improvements." Atmos. Meas. Tech., 7: 4353-4365 [10.5194/amt-7-4353-2014]

    Choi, T., J. Xiong, A. Angal, G. Chander, and J. Que. 2014. "Assessment of the spectral stability of Libya 4, Libya 1, and Mauritania 2 sites using Earth Observing One Hyperion." Journal of Applied Remote Sensing, 8 (1): 083618 [10.1117/1.JRS.8.083618]

    Chander, G., A. Angal, T. Choi, and J. Xiong. 2013. "Radiometric Cross-Calibration of EO-1 ALI With L7 ETM+ and Terra MODIS Sensors Using Near-Simultaneous Desert Observations." IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing, 6 (2): 386-399 [10.1109/JSTARS.2013.2251999]

    Wu, A., J. Xiong, and A. Angal. 2013. "Derive a MODIS-Based Calibration for the AVHRR Reflective Solar Channels of the NOAA KLM Operational Satellites." IEEE Trans. Geosci. Remote Sensing, 51 (3): 1405-1413 [10.1109/TGRS.2012.2220780]

    Angal, A., J. Xiong, T. Choi, et al. G. Chander, N. Mishra, and D. L. Helder. 2013. "Impact of Terra MODIS Collection 6 on long-term trending comparisons with Landsat 7 ETM+ reflective solar bands." Remote Sensing Letters, 4 (9): 873-881 [10.1080/2150704X.2013.809496]

    Wu, A., J. Xiong, D. R. Doelling, et al. D. Morstad, A. Angal, and R. Bhatt. 2013. "Characterization of Terra and Aqua MODIS VIS, NIR, and SWIR Spectral Bands' Calibration Stability." IEEE Trans. Geosci. Remote Sensing, 51 (7): 4330-4338 [10.1109/TGRS.2012.2226588]

    Chander, G., N. Mishra, D. L. Helder, et al. D. B. Aaron, A. A. Angal, T. Choi, X. Xiong, and D. R. Doelling. 2013. "Applications of Spectral Band Adjustment Factors (SBAF) for Cross-Calibration." IEEE Trans. Geosci. Remote Sensing, 51 (3): 1267-1281 [10.1109/TGRS.2012.2228007]

    Helder, D., K. J. Thome, N. Mishra, et al. G. Chander, X. Xiong, A. A. Angal, and T. Choi. 2013. "Absolute Radiometric Calibration of Landsat Using a Pseudo Invariant Calibration Site." IEEE Transactions on Geoscience and Remote Sensing, 51 (3): 1360-1369 [10.1109/TGRS.2013.2243738]

    Toller, G., J. Xiong, J. Sun, et al. B. Wenny, X. Geng, J. Kuyper, A. Angal, H. Chen, S. Madhavan, and A. Wu. 2013. "Terra and Aqua moderate-resolution imaging spectroradiometer collection 6 level 1B algorithm." Journal of Applied Remote Sensing, 7 (1): 073557 [10.1117/1.JRS.7.073557]

    Angal, A. A., J. Xiong, A. C. Wu, G. Chander, and T. Choi. 2013. "Multitemporal Cross-Calibration of the Terra MODIS and Landsat 7 ETM+ Reflective Solar Bands." IEEE Transactions on Geoscience and Remote Sensing, 51 (4): 1870-1882 [10.1109/TGRS.2012.2235448]

    Wu, A., X. Xiong, A. Angal, and W. Barnes. 2011. "Evaluation of detector-to-detector and mirror side differences for Terra MODIS reflective solar bands using simultaneous MISR observations." International Journal of Remote Sensing, 32 (2): 299-312 [10.1080/01431160903464138]

    Angal, A., G. Chander, X. Xiong, T. Choi, and A. Wu. 2011. "Characterization of the Sonoran desert as a radiometric calibration target for Earth observing sensors." Journal of Applied Remote Sensing, 5 (1): 059502-059502-6 [10.1117/1.3613963]

    Xiong, X. (., A. Wu, B. Wenny, J. Choi, and A. Angal. 2010. "Progress and lessons from MODIS calibration intercomparison using ground test sites." Canadian Journal of Remote Sensing, 36 (5): 540-552 [10.5589/m10-082]

    Angal, A. A., X. Xiong, T. Choi, and G. Chander. 2010. "Using the Sonoran and Libyan Desert test sites to monitor the temporal stability of reflective solar bands for Landsat 7 enhanced thematic mapper plus and Terra moderate resolution imaging spectroradiometer sensors." Journal of Applied Remote Sensing, [10.1117/1.3424910]

    Chander, G., X. Xiong, T. Choi, and A. A. Angal. 2010. "Monitoring on-orbit calibration stability of the Terra MODIS and Landsat 7 ETM+ sensors using pseudo-invariant test sites." Remote Sensing of Environment, 114 (4): 925-939 [10.1016/j.rse.2009.12.003]

    Selected Publications

    Refereed

    Xiong, X., A. Angal, K. A. Twedt, et al. H. Chen, D. Link, X. Geng, E. Aldoretta, and Q. Mu. 2019. "MODIS Reflective Solar Bands On-Orbit Calibration and Performance." IEEE Transactions on Geoscience and Remote Sensing 57 (9): 6355 - 6371 [10.1109/TGRS.2019.2905792]

    Tuli, F. T., C. T. Pinto, A. Angal, X. Xiong, and D. Helder. 2019. "New Approach for Temporal Stability Evaluation of Pseudo-Invariant Calibration Sites (PICS)." Remote Sensing 11 (12): 1502 [10.3390/rs11121502]

    Raut, B., M. Kaewmanee, A. Angal, X. Xiong, and D. Helder. 2019. "Empirical Absolute Calibration Model for Multiple Pseudo-Invariant Calibration Sites." Remote Sensing 11 (9): 1105 [10.3390/rs11091105]

    Chang, T., X. Xiong, and A. Angal. 2019. "Terra and Aqua MODIS TEB intercomparison using Himawari-8/AHI as reference." Journal of Applied Remote Sensing 13 (01): 1 [10.1117/1.jrs.13.017501]

    Oudrari, H., J. McIntire, X. Xiong, et al. J. Butler, Q. Ji, T. Schwarting, and A. Angal. 2018. "An Overall Assessment of JPSS-2 VIIRS Radiometric Performance Based on Pre-Launch Testing." Remote Sensing 10 (12): 1921 [10.3390/rs10121921]

    Angal, A., X. Xiong, D. Helder, M. Kaewmanee, and L. Leigh. 2018. "Assessing the calibration differences in the reflective solar bands of Terra MODIS and Landsat-7 enhanced thematic mapper plus." Journal of Applied Remote Sensing 12 (04): 1 [10.1117/1.jrs.12.044002]

    Xiong, X., A. Angal, W. L. Barnes, et al. H. Chen, V. Chiang, X. Geng, Y. Li, K. Twedt, Z. Wang, T. Wilson, and A. Wu. 2018. "Updates of Moderate Resolution Imaging Spectroradiometer on-orbit calibration uncertainty assessments." Journal of Applied Remote Sensing 12 (03): 1 [10.1117/1.jrs.12.034001]

    Angal, A., X. Xiong, A. Wu, X. Geng, and H. Chen. 2018. "Improvements in the On-Orbit Response Versus Scan Angle Characterization of the Aqua MODIS Reflective Solar Bands." IEEE Transactions on Geoscience and Remote Sensing 56 (3): 1728-1738 [10.1109/tgrs.2017.2767206]

    Angal, A., X. Xiong, Q. Mu, et al. D. R. Doelling, R. Bhatt, and A. Wu. 2018. "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 56 (2): 1115-1128 [10.1109/tgrs.2017.2759660]

    Chen, H., X. Xiong, A. Angal, and K. A. Twedt. 2017. "On-Orbit Characterization of the MODIS SDSM Screen for Solar Diffuser Degradation Estimation." IEEE Transactions on Geoscience and Remote Sensing 55 (11): 6456-6467 [10.1109/tgrs.2017.2728520]

    Mu, Q., A. Wu, X. Xiong, et al. D. Doelling, A. Angal, T. Chang, and R. Bhatt. 2017. "Optimization of a Deep Convective Cloud Technique in Evaluating the Long-Term Radiometric Stability of MODIS Reflective Solar Bands." Remote Sensing 9 (6): 535 [10.3390/rs9060535]

    Wu, A., X. Geng, A. Wald, A. Angal, and X. Xiong. 2017. "Assessment of Terra MODIS On-Orbit Polarization Sensitivity Using Pseudoinvariant Desert Sites." IEEE Transactions on Geoscience and Remote Sensing 55 (7): 4168-4176 [10.1109/tgrs.2017.2689719]

    Chang, T., X. Xiong, A. Angal, A. Wu, and X. Geng. 2017. "Aqua and Terra MODIS RSB Calibration Comparison Using BRDF Modeled Reflectance." IEEE Transactions on Geoscience and Remote Sensing 55 (4): 2288-2298 [10.1109/tgrs.2016.2641258]

    Angal, A., X. Xiong, and A. Wu. 2017. "Monitoring the On-Orbit Calibration of Terra MODIS Reflective Solar Bands Using Simultaneous Terra MISR Observations." IEEE Transactions on Geoscience and Remote Sensing 55 (3): 1648-1659 [10.1109/tgrs.2016.2628704]

    Bhatt, R., D. R. Doelling, A. Angal, et al. X. Xiong, B. Scarino, A. Gopalan, C. Haney, and A. Wu. 2017. "Characterizing response versus scan-angle for MODIS reflective solar bands using deep convective clouds." Journal of Applied Remote Sensing 11 (1): 016014 [10.1117/1.jrs.11.016014]

    Chen, H., X. Xiong, A. Angal, X. Geng, and A. Wu. 2016. "Alternative method of on-orbit response-versus-scan-angle characterization for MODIS reflective solar bands." J. Appl. Remote Sens 10 (2): 024004 [10.1117/1.jrs.10.024004]

    Chang, T., X. J. Xiong, A. Angal, and Q. Mu. 2016. "Assessment of MODIS RSB detector uniformity using deep convective clouds." J. Geophys. Res. Atmos. 121 (9): 4783-4796 [10.1002/2015jd024652]

    Xiong, X., M. D. King, V. V. Salomonson, et al. W. L. Barnes, B. N. Wenny, A. Angal, A. Wu, S. Madhavan, and D. O. Link. 2015. "Moderate Resolution Imaging Spectroradiometer on Terra and Aqua Missions." Qian/Optical Payloads for Space Missions 53-89 [10.1002/9781118945179.ch3]

    Angal, A., X. Xiong, J. Sun, and X. Geng. 2015. "On-orbit noise characterization of MODIS reflective solar bands." Journal of Applied Remote Sensing 9 (1): 094092 [10.1117/1.jrs.9.094092]

    Xiong, X., A. Angal, J. Sun, T. Choi, and E. Johnson. 2014. "On-orbit performance of MODIS solar diffuser stability monitor." J. Appl. Remote Sens 8 (1): 083514 [10.1117/1.jrs.8.083514]

    Sun, J., X. Xiong, A. A. Angal, H. Chen, and X. Geng. 2014. "Time-Dependent Response Versus Scan Angle for MODIS Reflective Solar Bands." Geoscience and Remote Sensing, IEEE Transactions on 52 (6): 3159-3174 [10.1109/TGRS.2013.2271448]

    Mishra, N., D. Helder, A. A. Angal, J. Choi, and X. Xiong. 2014. "Absolute Calibration of Optical Satellite Sensors Using Libya 4 Pseudo Invariant Calibration Site." Remote Sens. 6 (2): 1327-1346 [10.3390/rs6021327]

    Lyapustin, A. I., Y. Wang, X. Xiong, et al. G. Meister, S. E. Platnick, R. C. Levy, B. A. Franz, S. Korkin, T. Hilker, C. J. Tucker, F. G. Hall, P. J. Sellers, A. Wu, and A. A. Angal. 2014. "Scientific impact of MODIS C5 calibration degradation and C6+ improvements." Atmos. Meas. Tech. 7 4353-4365 [10.5194/amt-7-4353-2014]

    Choi, T., J. Xiong, A. Angal, G. Chander, and J. Que. 2014. "Assessment of the spectral stability of Libya 4, Libya 1, and Mauritania 2 sites using Earth Observing One Hyperion." Journal of Applied Remote Sensing 8 (1): 083618 [10.1117/1.JRS.8.083618]

    Chander, G., A. Angal, T. Choi, and J. Xiong. 2013. "Radiometric Cross-Calibration of EO-1 ALI With L7 ETM+ and Terra MODIS Sensors Using Near-Simultaneous Desert Observations." IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing 6 (2): 386-399 [10.1109/JSTARS.2013.2251999]

    Wu, A., J. Xiong, and A. Angal. 2013. "Derive a MODIS-Based Calibration for the AVHRR Reflective Solar Channels of the NOAA KLM Operational Satellites." IEEE Trans. Geosci. Remote Sensing 51 (3): 1405-1413 [10.1109/TGRS.2012.2220780]

    Angal, A., J. Xiong, T. Choi, et al. G. Chander, N. Mishra, and D. L. Helder. 2013. "Impact of Terra MODIS Collection 6 on long-term trending comparisons with Landsat 7 ETM+ reflective solar bands." Remote Sensing Letters 4 (9): 873-881 [10.1080/2150704X.2013.809496]

    Wu, A., J. Xiong, D. R. Doelling, et al. D. Morstad, A. Angal, and R. Bhatt. 2013. "Characterization of Terra and Aqua MODIS VIS, NIR, and SWIR Spectral Bands' Calibration Stability." IEEE Trans. Geosci. Remote Sensing 51 (7): 4330-4338 [10.1109/TGRS.2012.2226588]

    Chander, G., N. Mishra, D. L. Helder, et al. D. B. Aaron, A. A. Angal, T. Choi, X. Xiong, and D. R. Doelling. 2013. "Applications of Spectral Band Adjustment Factors (SBAF) for Cross-Calibration." IEEE Trans. Geosci. Remote Sensing 51 (3): 1267-1281 [10.1109/TGRS.2012.2228007]

    Helder, D., K. J. Thome, N. Mishra, et al. G. Chander, X. Xiong, A. A. Angal, and T. Choi. 2013. "Absolute Radiometric Calibration of Landsat Using a Pseudo Invariant Calibration Site." IEEE Transactions on Geoscience and Remote Sensing 51 (3): 1360-1369 [10.1109/TGRS.2013.2243738]

    Toller, G., J. Xiong, J. Sun, et al. B. Wenny, X. Geng, J. Kuyper, A. Angal, H. Chen, S. Madhavan, and A. Wu. 2013. "Terra and Aqua moderate-resolution imaging spectroradiometer collection 6 level 1B algorithm." Journal of Applied Remote Sensing 7 (1): 073557 [10.1117/1.JRS.7.073557]

    Angal, A. A., J. Xiong, A. C. Wu, G. Chander, and T. Choi. 2013. "Multitemporal Cross-Calibration of the Terra MODIS and Landsat 7 ETM+ Reflective Solar Bands." IEEE Transactions on Geoscience and Remote Sensing 51 (4): 1870-1882 [10.1109/TGRS.2012.2235448]

    Wu, A., X. Xiong, A. Angal, and W. Barnes. 2011. "Evaluation of detector-to-detector and mirror side differences for Terra MODIS reflective solar bands using simultaneous MISR observations." International Journal of Remote Sensing 32 (2): 299-312 [10.1080/01431160903464138]

    Angal, A., G. Chander, X. Xiong, T. Choi, and A. Wu. 2011. "Characterization of the Sonoran desert as a radiometric calibration target for Earth observing sensors." Journal of Applied Remote Sensing 5 (1): 059502-059502-6 [10.1117/1.3613963]

    Xiong, X. (., A. Wu, B. Wenny, J. Choi, and A. Angal. 2010. "Progress and lessons from MODIS calibration intercomparison using ground test sites." Canadian Journal of Remote Sensing 36 (5): 540-552 [10.5589/m10-082]

    Angal, A. A., X. Xiong, T. Choi, and G. Chander. 2010. "Using the Sonoran and Libyan Desert test sites to monitor the temporal stability of reflective solar bands for Landsat 7 enhanced thematic mapper plus and Terra moderate resolution imaging spectroradiometer sensors." Journal of Applied Remote Sensing [10.1117/1.3424910]

    Chander, G., X. Xiong, T. Choi, and A. A. Angal. 2010. "Monitoring on-orbit calibration stability of the Terra MODIS and Landsat 7 ETM+ sensors using pseudo-invariant test sites." Remote Sensing of Environment 114 (4): 925-939 [10.1016/j.rse.2009.12.003]

                                                                                                                                                                                            
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