Sciences and Exploration Directorate

Amit Angal

(SENIOR ENGINEER)

Amit Angal's Contact Card & Information.
Email: amit.a.angal@nasa.gov
Org Code: 618
Address:
NASA/GSFC
Mail Code 618
Greenbelt, MD 20771
Employer: SCIENCE SYSTEMS AND APPLICATIONS INC

Current Projects


MODIS Characterization Support Team

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


VIIRS Characterization Support Team

  • Support the pre-flight characterization of the JPSS-2, 3, and 4 VIIRS instruments
  • On-orbit calibration of the Suomi NPP and NOAA-20 VIIRS instruments

Professional Societies


IEEE

2021 - Present


SPIE

Conference Program Committee – SPIE Optical Engineering + Applications (2020-2022)

2016 - Present

Awards


2022 NASA Robert H. Goddard-Exceptional Achievement for Customer Service to JPSS-2 Instrument Development and Delivery Team

2019 Terra Missions' Pecora Team Award in recognition of significant contributions as a part of the MODIS Characterization Support Team

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

2023. "JPSS-3 / 4 VIIRS response versus scan angle characterization and performance." Frontiers in Remote Sensing 4 [10.3389/frsen.2023.1303347] [Journal Article/Letter]

2023. "Assessment of the Radiometric Calibration Consistency of Reflective Solar Bands between Terra and Aqua MODIS in Upcoming Collection-7 L1B." Remote Sensing 15 (19): 4730 [10.3390/rs15194730] [Journal Article/Letter]

2023. "Calibration of the SNPP and NOAA 20 VIIRS sensors for continuity of the MODIS climate data records." Remote Sensing of Environment 295 113717 [10.1016/j.rse.2023.113717] [Journal Article/Letter]

2022. "JPSS-2 VIIRS Pre-Launch Reflective Solar Band Testing and Performance." Remote Sensing 14 (24): 6353 [10.3390/rs14246353] [Journal Article/Letter]

2022. "JPSS-1 VIIRS Prelaunch Reflective Solar Band Testing and Performance." Remote Sensing 14 (20): 5113 [10.3390/rs14205113] [Journal Article/Letter]

2022. "Calibration Inter-Comparison of MODIS and VIIRS Reflective Solar Bands Using Lunar Observations." Remote Sensing 14 (19): 4754 [10.3390/rs14194754] [Journal Article/Letter]

2022. "An Assessment of SNPP and NOAA20 VIIRS RSB Calibration Performance in NASA SIPS Reprocessed Collection-2 L1B Data Products." Remote Sensing 14 (17): 4134 [10.3390/rs14174134] [Journal Article/Letter]

2022. "Terra and Aqua MODIS collection 7 level 1B algorithm." Journal of Applied Remote Sensing 16 (03): [10.1117/1.jrs.16.037502] [Journal Article/Letter]

2022. "Characterization of the on-orbit response versus scan angle for Terra MODIS SWIR bands in Collection 7." Journal of Applied Remote Sensing 16 (02): [10.1117/1.jrs.16.024520] [Journal Article/Letter]

2022. "An Overall Assessment of JPSS-3 VIIRS Radiometric Performance Based on Pre-Launch Testing." Remote Sensing 14 (9): 1999 [10.3390/rs14091999] [Journal Article/Letter]

2022. "Intercalibration of the reflective solar bands of MODIS and MISR instruments on the Terra platform." Journal of Applied Remote Sensing 16 (02): [10.1117/1.jrs.16.027501] [Journal Article/Letter]

2022. "On-Orbit Calibration and Performance of NOAA-20 VIIRS Reflective Solar Bands." IEEE Transactions on Geoscience and Remote Sensing 60 1-13 [10.1109/tgrs.2021.3108970] [Journal Article/Letter]

2022. "Nonlinear Detector Response of Aqua MODIS Land Imaging Bands." IEEE Transactions on Geoscience and Remote Sensing 60 1-10 [10.1109/tgrs.2021.3075384] [Journal Article/Letter]

2022. "Unscheduled Lunar Observations for Radiometric Characterization of VIIRS Reflective Solar Bands." IEEE Transactions on Geoscience and Remote Sensing 60 1-8 [10.1109/tgrs.2021.3112820] [Journal Article/Letter]

2021. "Ten Years of SNPP VIIRS Reflective Solar Bands On-Orbit Calibration and Performance." Remote Sensing 13 (15): 2944 [10.3390/rs13152944] [Journal Article/Letter]

2021. "Cross-Calibration of Terra and Aqua MODIS Using RadCalNet." IEEE Geoscience and Remote Sensing Letters 18 (2): 188-192 [10.1109/lgrs.2020.2973535] [Journal Article/Letter]

2020. "Improvements of on-orbit characterization of Terra MODIS short-wave infrared spectral bands out-of-band responses." Journal of Applied Remote Sensing 14 (04): [10.1117/1.jrs.14.047503] [Journal Article/Letter]

2020. "Performance of NOAA-20 VIIRS Solar Diffuser and Solar Diffuser Stability Monitor." IEEE Transactions on Geoscience and Remote Sensing 59 (9): 7180-7188 [10.1109/tgrs.2020.3032068] [Journal Article/Letter]

2020. "MODIS and VIIRS Calibration and Characterization in Support of Producing Long-Term High-Quality Data Products." Remote Sensing 12 (19): 3167 [10.3390/rs12193167] [Journal Article/Letter]

2020. "Terra MODIS: 20 years of on-orbit calibration and performance." Journal of Applied Remote Sensing 14 (03): 1 [10.1117/1.jrs.14.037501] [Journal Article/Letter]

2020. "On-Orbit Calibration of Terra MODIS VIS Bands Using Polarization-Corrected Desert Observations." IEEE Transactions on Geoscience and Remote Sensing 58 (8): 5428-5439 [10.1109/tgrs.2020.2966000] [Journal Article/Letter]

2020. "Cross-Calibration of MODIS Reflective Solar Bands With Sentinel 2A/2B MSI Instruments." IEEE Transactions on Geoscience and Remote Sensing 58 (7): 5000-5007 [10.1109/tgrs.2020.2971462] [Journal Article/Letter]

2020. "Effects of out-of-band and time-varying relative spectral response on the calibration of MODIS reflective solar bands." Journal of Applied Remote Sensing 14 (02): 1 [10.1117/1.jrs.14.024523] [Journal Article/Letter]

2020. "Stability Assessment of OCO-2 Radiometric Calibration Using Aqua MODIS as a Reference." Remote Sensing 12 (8): 1269 [10.3390/rs12081269] [Journal Article/Letter]

2020. "Response Versus Scan-Angle Assessment of MODIS Reflective Solar Bands in Collection 6.1 Calibration." IEEE Transactions on Geoscience and Remote Sensing 58 (4): 2276-2289 [10.1109/tgrs.2019.2946963] [Journal Article/Letter]

2020. "Assessment of SNPP VIIRS RSB detector-to-detector differences using deep convective clouds and deserts." Journal of Applied Remote Sensing 14 (01): 1 [10.1117/1.jrs.14.018503] [Journal Article/Letter]

2020. "Orbital Path and Spacecraft Attitude Correction for the MODIS Lunar Spatial Characterization." IEEE Transactions on Geoscience and Remote Sensing 58 (2): 1063-1073 [10.1109/tgrs.2019.2943254] [Journal Article/Letter]

2019. "Surface Roughness-Induced Spectral Degradation of Multi-Spaceborne Solar Diffusers Due to Space Radiation Exposure." IEEE Transactions on Geoscience and Remote Sensing 57 (11): 8658-8671 [10.1109/tgrs.2019.2922070] [Journal Article/Letter]

2019. "Early Calibration and Performance Assessments of NOAA-20 VIIRS Thermal Emissive Bands." IEEE Transactions on Geoscience and Remote Sensing 57 (11): 9242-9251 [10.1109/tgrs.2019.2925782] [Journal Article/Letter]

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] [Journal Article/Letter]

2019. "New Approach for Temporal Stability Evaluation of Pseudo-Invariant Calibration Sites (PICS)." Remote Sensing 11 (12): 1502 [10.3390/rs11121502] [Journal Article/Letter]

2019. "Empirical Absolute Calibration Model for Multiple Pseudo-Invariant Calibration Sites." Remote Sensing 11 (9): 1105 [10.3390/rs11091105] [Journal Article/Letter]

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] [Journal Article/Letter]

2018. "An Overall Assessment of JPSS-2 VIIRS Radiometric Performance Based on Pre-Launch Testing." Remote Sensing 10 (12): 1921 [10.3390/rs10121921] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

2016. "Assessment of MODIS RSB detector uniformity using deep convective clouds." J. Geophys. Res. Atmos. 121 (9): 4783-4796 [10.1002/2015jd024652] [Journal Article/Letter]

2015. "Moderate Resolution Imaging Spectroradiometer on Terra and Aqua Missions." Qian/Optical Payloads for Space Missions 53-89 [10.1002/9781118945179.ch3] [Article in Book]

2015. "On-orbit noise characterization of MODIS reflective solar bands." Journal of Applied Remote Sensing 9 (1): 094092 [10.1117/1.jrs.9.094092] [Journal Article/Letter]

2014. "On-orbit performance of MODIS solar diffuser stability monitor." J. Appl. Remote Sens 8 (1): 083514 [10.1117/1.jrs.8.083514] [Journal Article/Letter]

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] [Journal Article/Letter]

2014. "Absolute Calibration of Optical Satellite Sensors Using Libya 4 Pseudo Invariant Calibration Site." Remote Sens. 6 (2): 1327-1346 [10.3390/rs6021327] [Journal Article/Letter]

2014. "Scientific impact of MODIS C5 calibration degradation and C6+ improvements." Atmos. Meas. Tech. 7 4353-4365 [10.5194/amt-7-4353-2014] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]

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] [Journal Article/Letter]