Amit Angal

89 papers C 16Journal 45Unranked 28
YearRankTypeTitle / Venue / Authors
2024 J jnl
Development of an Uncertainty Budget for a Disseminated Lunar Irradiance Scale Over the Visible to Near-Infrared Spectral Region.
IEEE Trans. Geosci. Remote. Sens.
Steven W. Brown, Truman Wilson, Xiaoxiong Xiong, John T. Woodward, Amit Angal, Junqiang Sun
2024 J jnl
Early Mission Calibration Performance of NOAA-21 VIIRS Reflective Solar Bands.
Remote. Sens.
Ning Lei, Xiaoxiong Xiong, Kevin A. Twedt, Sherry Li, Tiejun Chang, Qiaozhen Mu, Amit Angal
2024 J jnl
Early Radiometric Assessment of NOAA-21 Visible Infrared Imaging Radiometer Suite Reflective Solar Bands Using Vicarious Techniques.
Remote. Sens.
Aisheng Wu, Xiaoxiong Xiong, Qiaozhen Mu, Amit Angal, Rajendra Bhatt, Yolanda Shea
2024 C conf
NOAA-21 VIIRS on-Orbit Calibration Performance: Year 1.
IGARSS
Xiaoxiong Xiong, Amit Angal, Ning Lei, Kwofu Chiang, Kevin A. Twedt, Hongda Chen
2024 J jnl
Pre-Launch Polarization Assessment of JPSS-3 and -4 VIIRS VNIR Bands and Comparison with Previous Builds.
Remote. Sens.
David Moyer, Jeff McIntire, Amit Angal, Xiaoxiong Xiong
2024 J jnl
Pre-Launch Thermal Emissive Band Radiometric Performance for JPSS-3 and -4 VIIRS.
Remote. Sens.
David Moyer, Amit Angal, Jeff McIntire, Xiaoxiong Xiong
2024 J jnl
Prelaunch Reflective Solar Band Radiometric Performance of JPSS-3 and -4 VIIRS.
Remote. Sens.
Amit Angal, David Moyer, Xiaoxiong Xiong, Qiang Ji, Daniel Link
2023 C conf
Assessment of the Modis Scan Mirror on-Orbit Response Changes.
IGARSS
Kevin A. Twedt, Amit Angal, Tiejun Chang, Xiaoxiong Xiong
2023 J jnl
Assessment of the Radiometric Calibration Consistency of Reflective Solar Bands between Terra and Aqua MODIS in Upcoming Collection-7 L1B.
Remote. Sens.
Aisheng Wu, Xiaoxiong Xiong, Amit Angal, Qiaozhen Mu, Sherry Li
2023 C conf
Early Results from NOAA-21 (JPSS-2) VIIRS on-Orbit Calibration.
IGARSS
Xiaoxiong Xiong, Amit Angal, Junqiang Sun, Ning Lei, Kevin A. Twedt, Kwo-Fu Chiang
2023 C conf
Status of the Terra and Aqua Modis Collection 7 L1B.
IGARSS
Amit Angal, Xiaoxiong Xiong, Kevin A. Twedt, Tiejun Chang, Xu Geng, Emily J. Aldoretta, Carlos L. Pérez Díaz
2022 J jnl
An Assessment of SNPP and NOAA20 VIIRS RSB Calibration Performance in NASA SIPS Reprocessed Collection-2 L1B Data Products.
Remote. Sens.
Aisheng Wu, Xiaoxiong Xiong, Rajendra Bhatt, Conor O. Haney, David R. Doelling, Amit Angal, Qiaozhen Mu
2022 J jnl
An Overall Assessment of JPSS-3 VIIRS Radiometric Performance Based on Pre-Launch Testing.
Remote. Sens.
Jeff McIntire, Xiaoxiong Xiong, James J. Butler, Amit Angal, David Moyer, Qiang Ji, Thomas Schwarting, Daniel O. Link, Chengbo Sun
2022 J jnl
Calibration Inter-Comparison of MODIS and VIIRS Reflective Solar Bands Using Lunar Observations.
Remote. Sens.
Xiaoxiong Xiong, Junqiang Sun, Amit Angal, Truman Wilson
2022 J jnl
JPSS-1 VIIRS Prelaunch Reflective Solar Band Testing and Performance.
Remote. Sens.
David Moyer, Amit Angal, Hassan Oudrari, Evan Haas, Qiang Ji, Frank De Luccia, Xiaoxiong Xiong
2022 J jnl
JPSS-2 VIIRS Pre-Launch Reflective Solar Band Testing and Performance.
Remote. Sens.
David Moyer, Amit Angal, Qiang Ji, Jeff McIntire, Xiaoxiong Xiong
2022 J jnl
Nonlinear Detector Response of Aqua MODIS Land Imaging Bands.
IEEE Trans. Geosci. Remote. Sens.
Kevin A. Twedt, Sarah Henderson, Xiaoxiong Xiong, Amit Angal, Xu Geng
2022 J jnl
On-Orbit Calibration and Performance of NOAA-20 VIIRS Reflective Solar Bands.
IEEE Trans. Geosci. Remote. Sens.
Kevin A. Twedt, Ning Lei, Xiaoxiong Xiong, Amit Angal, Sherry Li, Tiejun Chang, Junqiang Sun
2022 J jnl
Unscheduled Lunar Observations for Radiometric Characterization of VIIRS Reflective Solar Bands.
IEEE Trans. Geosci. Remote. Sens.
Amit Angal, Xiaoxiong Xiong, Truman Wilson
2021 J jnl
Cross-Calibration of Terra and Aqua MODIS Using RadCalNet.
IEEE Geosci. Remote. Sens. Lett.
Amit Angal, Xiaoxiong Xiong, Kurtis J. Thome, Brian N. Wenny
2021 J jnl
Performance of NOAA-20 VIIRS Solar Diffuser and Solar Diffuser Stability Monitor.
IEEE Trans. Geosci. Remote. Sens.
Ning Lei, Kevin A. Twedt, Xiaoxiong Xiong, Amit Angal
2021 J jnl
Ten Years of SNPP VIIRS Reflective Solar Bands On-Orbit Calibration and Performance.
Remote. Sens.
Junqiang Sun, Xiaoxiong Xiong, Ning Lei, Sherry Li, Kevin A. Twedt, Amit Angal
2020 J jnl
Cross-Calibration of MODIS Reflective Solar Bands With Sentinel 2A/2B MSI Instruments.
IEEE Trans. Geosci. Remote. Sens.
Amit Angal, Xiaoxiong Xiong, Ashish Shrestha
2020 J jnl
MODIS and VIIRS Calibration and Characterization in Support of Producing Long-Term High-Quality Data Products.
Remote. Sens.
Xiaoxiong Xiong, Amit Angal, Tiejun Chang, Kwo-Fu Chiang, Ning Lei, Yonghong Li, Junqiang Sun, Kevin A. Twedt, Aisheng Wu
2020 C conf
NOAA-20 VIIRS on-Orbit Calibration Improvements.
IGARSS
Xiaoxiong Xiong, Changyong Cao, Amit Angal, Slawomir Blonski, Kwofu Chiang, Taeyoung Choi, Yalong Gu, Ning Lei, Y. Li, Xi Shao, Kevin A. Twedt, Sirish Uprety, Wenhui Wang
2020 J jnl
On-Orbit Calibration of Terra MODIS VIS Bands Using Polarization-Corrected Desert Observations.
IEEE Trans. Geosci. Remote. Sens.
Amit Angal, Xu Geng, Xiaoxiong Xiong, Kevin A. Twedt, Aisheng Wu, Daniel O. Link, Emily J. Aldoretta
2020 J jnl
Orbital Path and Spacecraft Attitude Correction for the MODIS Lunar Spatial Characterization.
IEEE Trans. Geosci. Remote. Sens.
Truman Wilson, Amit Angal, Xiaoxiong Xiong
2020 J jnl
Response Versus Scan-Angle Assessment of MODIS Reflective Solar Bands in Collection 6.1 Calibration.
IEEE Trans. Geosci. Remote. Sens.
Rajendra Bhatt, David R. Doelling, Amit Angal, Xiaoxiong Xiong, Conor O. Haney, Benjamin R. Scarino, Aisheng Wu, Arun Gopalan
2020 J jnl
Stability Assessment of OCO-2 Radiometric Calibration Using Aqua MODIS as a Reference.
Remote. Sens.
Shanshan Yu, Robert Rosenberg, Carol J. Bruegge, Lars Chapsky, Dejian Fu, Richard A. Lee, Thomas E. Taylor, Heather Cronk, Christopher W. O'Dell, Amit Angal, Xiaoxiong Xiong, David Crisp, Annmarie Eldering
2019 J jnl
Early Calibration and Performance Assessments of NOAA-20 VIIRS Thermal Emissive Bands.
IEEE Trans. Geosci. Remote. Sens.
Yonghong Li, Xiaoxiong Xiong, Jeff McIntire, Amit Angal, Sergey Gusev, Kwo-Fu Chiang
2019 J jnl
Empirical Absolute Calibration Model for Multiple Pseudo-Invariant Calibration Sites.
Remote. Sens.
Bipin Raut, Morakot Kaewmanee, Amit Angal, Xiaoxiong Xiong, Dennis L. Helder
2019 J jnl
MODIS Reflective Solar Bands On-Orbit Calibration and Performance.
IEEE Trans. Geosci. Remote. Sens.
Xiaoxiong Xiong, Amit Angal, Kevin A. Twedt, Hongda Chen, Daniel Link, Xu Geng, Emily J. Aldoretta, Qiaozhen Mu
2019 C conf
NOAA-20 VIIRS On-Orbit Calibration and Performance Update.
IGARSS
Xiaoxiong Xiong, Amit Angal, James J. Butler, Kwofu Chiang, Ning Lei, Yonghong Li, Kevin A. Twedt
2019 J jnl
New Approach for Temporal Stability Evaluation of Pseudo-Invariant Calibration Sites (PICS).
Remote. Sens.
Fatima Tuz Zafrin Tuli, Cibele Teixeira Pinto, Amit Angal, Xiaoxiong Xiong, Dennis L. Helder
2019 J jnl
Surface Roughness-Induced Spectral Degradation of Multi-Spaceborne Solar Diffusers Due to Space Radiation Exposure.
IEEE Trans. Geosci. Remote. Sens.
Xi Shao, Tung-Chang Liu, Xiaoxiong Xiong, Changyong Cao, Taeyoung Choi, Amit Angal
2018 J jnl
An Overall Assessment of JPSS-2 VIIRS Radiometric Performance Based on Pre-Launch Testing.
Remote. Sens.
Hassan Oudrari, Jeff McIntire, Xiaoxiong Xiong, James J. Butler, Qiang Ji, Thomas Schwarting, Amit Angal
2018 — conf
Comparison of the MODIS and VIIRS on-board SD and SDSM performance.
Earth Observing Systems
Amit Angal, Xiaoxiong Xiong, Ning Lei, Kevin A. Twedt
2018 C conf
Early Results from NOAA-20 (JPSS-1) VIIRS On-ORBIT Calibration and Characterization.
IGARSS
Xiaoxiong Xiong, Changyong Cao, Ning Lei, Kwofu Chiang, Amit Angal, Yonghong Li, Slawomir Blonski, Wenhui Wang, Taeyoung Choi
2018 — conf
Effects of time-varying relative spectral response on the calibration of MODIS reflective solar bands.
Earth Observing Systems
Kevin A. Twedt, Amit Angal, Xiaoxiong Xiong
2018 J jnl
Improvements in the On-Orbit Response Versus Scan Angle Characterization of the Aqua MODIS Reflective Solar Bands.
IEEE Trans. Geosci. Remote. Sens.
Amit Angal, Xiaoxiong Xiong, Aisheng Wu, Xu Geng, Hongda Chen
2018 — conf
MODIS and VIIRS on-orbit calibration and characterization using observations from spacecraft pitch maneuvers.
Earth Observing Systems
Xiaoxiong Xiong, Aisheng Wu, Amit Angal, Kwo-Fu Chiang, James J. Butler
2018 — conf
Methods of Earth-view-based calibration of the response versus scan angle of the MODIS reflective solar bands.
Earth Observing Systems
Kevin A. Twedt, Hongda Chen, Xiaoxiong Xiong, Amit Angal, Xu Geng, Aisheng Wu
2018 — conf
On-orbit performance of the Terra and Aqua MODIS solar diffuser stability monitor.
Earth Observing Systems
Emily J. Aldoretta, Kevin A. Twedt, Amit Angal, Hongda Chen, Xiaoxiong Xiong
2018 — conf
Prelaunch characterization and performance of JPSS-2 VIIRS reflective solar bands.
Earth Observing Systems
Amit Angal, David Moyer, Qiang Ji, Jeff McIntire, Hassan Oudrari, Xiaoxiong Xiong
2018 J jnl
Results From the Deep Convective Clouds-Based Response Versus Scan-Angle Characterization for the MODIS Reflective Solar Bands.
IEEE Trans. Geosci. Remote. Sens.
Amit Angal, Xiaoxiong Xiong, Qiaozhen Mu, David R. Doelling, Rajendra Bhatt, Aisheng Wu
2017 C conf
15 Years of Aqua MODIS on-orbit operation, calibration, and performance.
IGARSS
Xiaoxiong Xiong, Amit Angal, Aisheng Wu, Zhipeng Wang, William L. Barnes, Vincent V. Salomonson
2017 J jnl
Aqua and Terra MODIS RSB Calibration Comparison Using BRDF Modeled Reflectance.
IEEE Trans. Geosci. Remote. Sens.
Tiejun Chang, Xiaoxiong Xiong, Amit Angal, Aisheng Wu, Xu Geng
2017 J jnl
Assessment of Terra MODIS On-Orbit Polarization Sensitivity Using Pseudoinvariant Desert Sites.
IEEE Trans. Geosci. Remote. Sens.
Aisheng Wu, Xu Geng, Andrew Wald, Amit Angal, Xiaoxiong Xiong
2017 — conf
MODIS solar diffuser degradation at short-wave infrared band wavelengths.
Earth Observing Systems
Kevin A. Twedt, Amit Angal, Xiaoxiong Xiong, Xu Geng, Hongda Chen
2017 J jnl
Monitoring the On-Orbit Calibration of Terra MODIS Reflective Solar Bands Using Simultaneous Terra MISR Observations.
IEEE Trans. Geosci. Remote. Sens.
Amit Angal, Xiaoxiong Xiong, Aisheng Wu
2017 J jnl
On-Orbit Characterization of the MODIS SDSM Screen for Solar Diffuser Degradation Estimation.
IEEE Trans. Geosci. Remote. Sens.
Hongda Chen, Xiaoxiong Xiong, Amit Angal, Kevin A. Twedt
2017 J jnl
Optimization of a Deep Convective Cloud Technique in Evaluating the Long-Term Radiometric Stability of MODIS Reflective Solar Bands.
Remote. Sens.
Qiaozhen Mu, Aisheng Wu, Xiaoxiong Xiong, David R. Doelling, Amit Angal, Tiejun Chang, Rajendra Bhatt
2016 — conf
Assessment of MODIS on-orbit calibration using a deep convective cloud technique.
Earth Observing Systems
Qiaozhen Mu, Aisheng Wu, Tiejun Chang, Amit Angal, Daniel Link, Xiaoxiong Xiong, David R. Doelling, Rajendra Bhatt
2016 — conf
Calibration improvements in the detector-to-detector differences for the MODIS ocean color bands.
Earth Observing Systems
Yonghong Li, Amit Angal, Aisheng Wu, Xu Geng, Daniel Link, Xiaoxiong (Jack) Xiong
2016 — conf
Demonstrating the error budget for the climate absolute radiance and refractivity observatory through solar irradiance measurements (Conference Presentation).
Earth Observing Systems
Kurtis J. Thome, Joel McCorkel, Amit Angal
2016 — conf
Evaluation of GLAMR-based calibration for SI-traceable field reflectance retrievals.
Earth Observing Systems
Amit Angal, Joel McCorkel, Kurt J. Thome
2016 — conf
Improvement in the characterization of MODIS subframe difference.
Earth Observing Systems
Yonghong Li, Amit Angal, Na Chen, Xu Geng, Daniel Link, Zhipeng Wang, Aisheng Wu, Xiaoxiong (Jack) Xiong
2016 — conf
Results from source-based and detector-based calibrations of a CLARREO calibration demonstration system.
Earth Observing Systems
Amit Angal, Joel McCorkel, Kurt J. Thome
2016 C conf
Terra and Aqua MODIS instrument performance.
IGARSS
Xiaoxiong Xiong, Amit Angal, Aisheng Wu, William L. Barnes, Vince Salomonson
2015 — conf
Assessment of MODIS and VIIRS solar diffuser on-orbit degradation.
Earth Observing Systems
Xiaoxiong Xiong, Jon Fulbright, Amit Angal, Zhipeng Wang, Xu Geng, Jim Butler
2015 — conf
Assessment of the Collection 6 Terra and Aqua MODIS bands 1 and 2 calibration performance.
Earth Observing Systems
Aisheng Wu, X. Chen, Amit Angal, Yonghong Li, Xiaoxiong Xiong
2015 — conf
Calibration improvements for MODIS and VIIRS SWIR spectral bands.
Earth Observing Systems
Xiaoxiong Xiong, Amit Angal, Jon Fulbright, Ning Lei, Qiaozhen Mu, Zhipeng Wang, Aisheng Wu
2015 — conf
Radiometric calibration of G-LiHT's imaging spectrometer using GLAMR for satellite sensor intercalibration.
Earth Observing Systems
Amit Angal, Joel McCorkel, Bruce D. Cook, Lawrence A. Corp, Kurt J. Thome
2014 J jnl
Absolute Calibration of Optical Satellite Sensors Using Libya 4 Pseudo Invariant Calibration Site.
Remote. Sens.
Nischal Mishra, Dennis L. Helder, Amit Angal, Jason Choi, Xiaoxiong Xiong
2014 — conf
Comparison of coincident MODIS and MISR reflectances over the 15-year period of EOS Terra.
Earth Observing Systems
Aisheng Wu, Amit Angal, Xiaoxiong Xiong
2014 — conf
Cross-calibration of Landsat 5 TM and Landsat 8 OLI with Aqua MODIS using PICS.
Earth Observing Systems
Amit Angal, Nischal Mishra, Xiaoxiong Xiong, Dennis L. Helder
2014 C conf
MODIS instrument operation and calibration improvements.
IGARSS
Xiaoxiong Xiong, Amit Angal, Sriharsha Madhavan, Daniel Link, Xu Geng, Brian Wenny, Aisheng Wu, Hongda Chen, Vince Salomonson
2014 — conf
Monitoring the Terra and Aqua MODIS RSB calibration using scattered light from the Nadir-port.
Earth Observing Systems
Amit Angal, Xiaoxiong Xiong, Xu Geng, Junqiang Sun
2014 — conf
Progress on alternative method of the on-orbit RVS characterization for MODIS reflective solar bands.
Earth Observing Systems
Hongda Chen, Xiaoxiong Xiong, Amit Angal, Xu Geng, Aisheng Wu
2014 — conf
Status of Terra MODIS operation, calibration, and performance.
Earth Observing Systems
Xiaoxiong Xiong, Brian N. Wenny, Aisheng Wu, Amit Angal, Xu Geng, Hongda Chen, Jennifer L. Dodd, Daniel O. Link, Sriharsha Madhavan, Na Chen, Yonghong Li, Sean Iacangelo, William L. Barnes, Vince Salomonson
2014 — conf
Status of time-dependent response versus scan-angle (RVS) for Terra and Aqua MODIS reflective solar bands.
Earth Observing Systems
Xu Geng, Amit Angal, Junqiang Sun, Hongda Chen, Aisheng Wu, Yonghong Li, Daniel Link, Xiaoxiong Xiong
2014 J jnl
Time-Dependent Response Versus Scan Angle for MODIS Reflective Solar Bands.
IEEE Trans. Geosci. Remote. Sens.
Junqiang Sun, Xiaoxiong Xiong, Amit Angal, Hongda Chen, Aisheng Wu, Xu Geng
2013 J jnl
Absolute Radiometric Calibration of Landsat Using a Pseudo Invariant Calibration Site.
IEEE Trans. Geosci. Remote. Sens.
Dennis L. Helder, Kurtis J. Thome, Nischal Mishra, Gyanesh Chander, Xiaoxiong Xiong, Amit Angal, Taeyoung Choi
2013 J jnl
Applications of Spectral Band Adjustment Factors (SBAF) for Cross-Calibration.
IEEE Trans. Geosci. Remote. Sens.
Gyanesh Chander, Nischal Mishra, Dennis L. Helder, David Aaron, Amit Angal, Taeyoung Choi, Xiaoxiong Xiong, David R. Doelling
2013 J jnl
Characterization of Terra and Aqua MODIS VIS, NIR, and SWIR Spectral Bands' Calibration Stability.
IEEE Trans. Geosci. Remote. Sens.
Aisheng Wu, Xiaoxiong Xiong, David R. Doelling, Daniel L. Morstad, Amit Angal, Rajendra Bhatt
2013 J jnl
Derive a MODIS-Based Calibration for the AVHRR Reflective Solar Channels of the NOAA KLM Operational Satellites.
IEEE Trans. Geosci. Remote. Sens.
Aisheng Wu, Xiaoxiong Xiong, Amit Angal
2013 J jnl
Multitemporal Cross-Calibration of the Terra MODIS and Landsat 7 ETM+ Reflective Solar Bands.
IEEE Trans. Geosci. Remote. Sens.
Amit Angal, Xiaoxiong Xiong, Aisheng Wu, Gyanesh Chander, Taeyoung Choi
2013 J jnl
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 Obs. Remote. Sens.
Gyanesh Chander, Amit Angal, Taeyoung Choi, Xiaoxiong Xiong
2013 C conf
Status of MODIS instrument and radiometric calibration.
IGARSS
Xiaoxiong Xiong, Brian Wenny, Amit Angal, Junqiang Sun, Vincent V. Salomonson, William L. Barnes
2012 C conf
MODIS radiometric calibration program, methods and results.
IGARSS
Xiaoxiong Xiong, Bruce Guenther, Amit Angal, William L. Barnes, Vince Salomonson, Junqiang Sun, Brian Wenny
2012 C conf
NPP VIIRS early on-orbit solar diffuser degradation results.
IGARSS
David Moyer, Evan Haas, Jon Fulbright, Hassan Oudrari, Xiaoxiong Xiong, Amit Angal, Stephen Mills, Lushalan Liao, Frank De Luccia, Kameron Rausch
2011 C conf
Summary of Terra and Aqua MODIS long-term performance.
IGARSS
Xiaoxiong Xiong, Brian Wenny, Amit Angal, William L. Barnes, Vince Salomonson
2010 C conf
The use of the Sonoran Desert as a pseudo-invariant site for optical sensor cross-calibration and long-term stability monitoring.
IGARSS
Amit Angal, Gyanesh Chander, Taeyoung Choi, Aisheng Wu, Xiaoxiong Xiong
2010 C conf
Use of EO-1 Hyperion data to calculate spectral band adjustment factors (SBAF) between the L7 ETM+ and Terra MODIS sensors.
IGARSS
Gyanesh Chander, Nischal Mishra, Dennis L. Helder, David Aaron, Taeyoung Choi, Amit Angal, Xiaoxiong Xiong
2009 — conf
An Assessment of African Test Sites in the Context of a Global Network of Quality-assured Reference Standards.
IGARSS (5)
Gyanesh Chander, Xiaoxiong Xiong, Amit Angal, Taeyoung Choi
2009 — conf
Assessment of the Short-term Radiometric Stability between Terra MODIS and Landsat 7 ETM+ Sensors.
IGARSS (4)
Taeyoung Choi, Xiaoxiong Xiong, Gyanesh Chander, Amit Angal
2008 — conf
Comparison of Terra and Aqua MODIS VIS Bands On-Orbit Response.
IGARSS (4)
Xiaoxiong (Jack) Xiong, Junqiang Sun, Nianzen Che, Amit Angal, Taeyoung (Jason) Choi
2008 — conf
Monitoring On-Orbit Stability of Terra MODIS and Landsat 7 ETM+ Reflective Solar Bands using Railroad Valley Playa, Nevada(RVPN) Test Site.
IGARSS (4)
Amit Angal, Taeyoung (Jason) Choi, Gyanesh Chander, Xiaoxiong (Jack) Xiong
2008 — conf
On-Orbit Noise Characterization for MODIS Reflective Solar Bands.
IGARSS (4)
Xiaoxiong (Jack) Xiong, Amit Angal, Xiaobo Xie