Amit Angal

Publication Activity (10 Years)

Years Active: 2008-2024
Publications (10 Years): 59

Top Topics

Radiometric Calibration

Top Venues

Earth Observing Systems

IEEE Trans. Geosci. Remote. Sens.

Publications

Aisheng Wu, Xiaoxiong Xiong, Qiaozhen Mu, Amit Angal, Rajendra Bhatt, Yolanda Shea
Early Radiometric Assessment of NOAA-21 Visible Infrared Imaging Radiometer Suite Reflective Solar Bands Using Vicarious Techniques. Remote. Sens. 16 (14) (2024)
David Moyer, Jeff McIntire, Amit Angal, Xiaoxiong Xiong
Pre-Launch Polarization Assessment of JPSS-3 and -4 VIIRS VNIR Bands and Comparison with Previous Builds. Remote. Sens. 16 (12) (2024)
Steven W. Brown, Truman Wilson, Xiaoxiong Xiong, John T. Woodward, Amit Angal, Junqiang Sun
Development of an Uncertainty Budget for a Disseminated Lunar Irradiance Scale Over the Visible to Near-Infrared Spectral Region. IEEE Trans. Geosci. Remote. Sens. 62 (2024)
Aisheng Wu, Xiaoxiong Xiong, Amit Angal, Qiaozhen Mu, Sherry Li
Assessment of the Radiometric Calibration Consistency of Reflective Solar Bands between Terra and Aqua MODIS in Upcoming Collection-7 L1B. Remote. Sens. 15 (19) (2023)
Kevin A. Twedt, Amit Angal, Tiejun Chang, Xiaoxiong Xiong
Assessment of the Modis Scan Mirror on-Orbit Response Changes. IGARSS (2023)
Xiaoxiong Xiong, Amit Angal, Junqiang Sun, Ning Lei, Kevin A. Twedt, Kwo-Fu Chiang
Early Results from NOAA-21 (JPSS-2) VIIRS on-Orbit Calibration. IGARSS (2023)
Amit Angal, Xiaoxiong Xiong, Kevin A. Twedt, Tiejun Chang, Xu Geng, Emily J. Aldoretta, Carlos L. Pérez Díaz
Status of the Terra and Aqua Modis Collection 7 L1B. IGARSS (2023)
Xiaoxiong Xiong, Junqiang Sun, Amit Angal, Truman Wilson
Calibration Inter-Comparison of MODIS and VIIRS Reflective Solar Bands Using Lunar Observations. Remote. Sens. 14 (19) (2022)
Amit Angal, Xiaoxiong Xiong, Truman Wilson
Unscheduled Lunar Observations for Radiometric Characterization of VIIRS Reflective Solar Bands. IEEE Trans. Geosci. Remote. Sens. 60 (2022)
David Moyer, Amit Angal, Hassan Oudrari, Evan Haas, Qiang Ji, Frank De Luccia, Xiaoxiong Xiong
JPSS-1 VIIRS Prelaunch Reflective Solar Band Testing and Performance. Remote. Sens. 14 (20) (2022)
David Moyer, Amit Angal, Qiang Ji, Jeff McIntire, Xiaoxiong Xiong
JPSS-2 VIIRS Pre-Launch Reflective Solar Band Testing and Performance. Remote. Sens. 14 (24) (2022)
Aisheng Wu, Xiaoxiong Xiong, Rajendra Bhatt, Conor O. Haney, David R. Doelling, Amit Angal, Qiaozhen Mu
An Assessment of SNPP and NOAA20 VIIRS RSB Calibration Performance in NASA SIPS Reprocessed Collection-2 L1B Data Products. Remote. Sens. 14 (17) (2022)
Kevin A. Twedt, Ning Lei, Xiaoxiong Xiong, Amit Angal, Sherry Li, Tiejun Chang, Junqiang Sun
On-Orbit Calibration and Performance of NOAA-20 VIIRS Reflective Solar Bands. IEEE Trans. Geosci. Remote. Sens. 60 (2022)
Kevin A. Twedt, Sarah Henderson, Xiaoxiong Xiong, Amit Angal, Xu Geng
Nonlinear Detector Response of Aqua MODIS Land Imaging Bands. IEEE Trans. Geosci. Remote. Sens. 60 (2022)
Jeff McIntire, Xiaoxiong Xiong, James J. Butler, Amit Angal, David Moyer, Qiang Ji, Thomas Schwarting, Daniel O. Link, Chengbo Sun
An Overall Assessment of JPSS-3 VIIRS Radiometric Performance Based on Pre-Launch Testing. Remote. Sens. 14 (9) (2022)
Ning Lei, Kevin A. Twedt, Xiaoxiong Xiong, Amit Angal
Performance of NOAA-20 VIIRS Solar Diffuser and Solar Diffuser Stability Monitor. IEEE Trans. Geosci. Remote. Sens. 59 (9) (2021)
Amit Angal, Xiaoxiong Xiong, Kurtis Thome, Brian N. Wenny
Cross-Calibration of Terra and Aqua MODIS Using RadCalNet. IEEE Geosci. Remote. Sens. Lett. 18 (2) (2021)
Junqiang Sun, Xiaoxiong Xiong, Ning Lei, Sherry Li, Kevin A. Twedt, Amit Angal
Ten Years of SNPP VIIRS Reflective Solar Bands On-Orbit Calibration and Performance. Remote. Sens. 13 (15) (2021)
Truman Wilson, Amit Angal, Xiaoxiong Xiong
Orbital Path and Spacecraft Attitude Correction for the MODIS Lunar Spatial Characterization. IEEE Trans. Geosci. Remote. Sens. 58 (2) (2020)
Shanshan Yu, Robert Rosenberg, Carol J. Bruegge, Lars Chapsky, Dejian Fu, Richard A. M. Lee, Thomas E. Taylor, Heather Cronk, Christopher W. O'Dell, Amit Angal, Xiaoxiong Xiong, David Crisp, Annmarie Eldering
Stability Assessment of OCO-2 Radiometric Calibration Using Aqua MODIS as a Reference. Remote. Sens. 12 (8) (2020)
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
NOAA-20 VIIRS on-Orbit Calibration Improvements. IGARSS (2020)
Rajendra Bhatt, David R. Doelling, Amit Angal, Xiaoxiong Xiong, Conor O. Haney, Benjamin R. Scarino, Aisheng Wu, Arun Gopalan
Response Versus Scan-Angle Assessment of MODIS Reflective Solar Bands in Collection 6.1 Calibration. IEEE Trans. Geosci. Remote. Sens. 58 (4) (2020)
Xiaoxiong Xiong, Amit Angal, Tiejun Chang, Kwo-Fu Chiang, Ning Lei, Yonghong Li, Junqiang Sun, Kevin A. Twedt, Aisheng Wu
MODIS and VIIRS Calibration and Characterization in Support of Producing Long-Term High-Quality Data Products. Remote. Sens. 12 (19) (2020)
Amit Angal, Xu Geng, Xiaoxiong Xiong, Kevin A. Twedt, Aisheng Wu, Daniel O. Link, Emily J. Aldoretta
On-Orbit Calibration of Terra MODIS VIS Bands Using Polarization-Corrected Desert Observations. IEEE Trans. Geosci. Remote. Sens. 58 (8) (2020)
Amit Angal, Xiaoxiong Xiong, Ashish Shrestha
Cross-Calibration of MODIS Reflective Solar Bands With Sentinel 2A/2B MSI Instruments. IEEE Trans. Geosci. Remote. Sens. 58 (7) (2020)
Bipin Raut, Morakot Kaewmanee, Amit Angal, Xiaoxiong Xiong, Dennis L. Helder
Empirical Absolute Calibration Model for Multiple Pseudo-Invariant Calibration Sites. Remote. Sens. 11 (9) (2019)
Fatima Tuz Zafrin Tuli, Cibele Teixeira Pinto, Amit Angal, Xiaoxiong Xiong, Dennis L. Helder
New Approach for Temporal Stability Evaluation of Pseudo-Invariant Calibration Sites (PICS). Remote. Sens. 11 (12) (2019)
Xiaoxiong Xiong, Amit Angal, James J. Butler, Kwofu Chiang, Ning Lei, Yonghong Li, Kevin A. Twedt
NOAA-20 VIIRS On-Orbit Calibration and Performance Update. IGARSS (2019)
Xiaoxiong Xiong, Amit Angal, Kevin A. Twedt, Hongda Chen, Daniel Link, Xu Geng, Emily J. Aldoretta, Qiaozhen Mu
MODIS Reflective Solar Bands On-Orbit Calibration and Performance. IEEE Trans. Geosci. Remote. Sens. 57 (9) (2019)
Xi Shao, Tung-Chang Liu, Xiaoxiong Xiong, Changyong Cao, Taeyoung Choi, Amit Angal
Surface Roughness-Induced Spectral Degradation of Multi-Spaceborne Solar Diffusers Due to Space Radiation Exposure. IEEE Trans. Geosci. Remote. Sens. 57 (11) (2019)
Yonghong Li, Xiaoxiong Xiong, Jeff McIntire, Amit Angal, Sergey Gusev, Kwo-Fu Chiang
Early Calibration and Performance Assessments of NOAA-20 VIIRS Thermal Emissive Bands. IEEE Trans. Geosci. Remote. Sens. 57 (11) (2019)
Hassan Oudrari, Jeff McIntire, Xiaoxiong Xiong, James J. Butler, Qiang Ji, Thomas Schwarting, Amit Angal
An Overall Assessment of JPSS-2 VIIRS Radiometric Performance Based on Pre-Launch Testing. Remote. Sens. 10 (12) (2018)
Kevin A. Twedt, Amit Angal, Xiaoxiong Xiong
Effects of time-varying relative spectral response on the calibration of MODIS reflective solar bands. Earth Observing Systems (2018)
Emily J. Aldoretta, Kevin A. Twedt, Amit Angal, Hongda Chen, Xiaoxiong Xiong
On-orbit performance of the Terra and Aqua MODIS solar diffuser stability monitor. Earth Observing Systems (2018)
Amit Angal, Xiaoxiong Xiong, Qiaozhen Mu, David R. Doelling, Rajendra Bhatt, Aisheng Wu
Results From the Deep Convective Clouds-Based Response Versus Scan-Angle Characterization for the MODIS Reflective Solar Bands. IEEE Trans. Geosci. Remote. Sens. 56 (2) (2018)
Kevin A. Twedt, Hongda Chen, Xiaoxiong Xiong, Amit Angal, Xu Geng, Aisheng Wu
Methods of Earth-view-based calibration of the response versus scan angle of the MODIS reflective solar bands. Earth Observing Systems (2018)
Amit Angal, Xiaoxiong Xiong, Aisheng Wu, Xu Geng, Hongda Chen
Improvements in the On-Orbit Response Versus Scan Angle Characterization of the Aqua MODIS Reflective Solar Bands. IEEE Trans. Geosci. Remote. Sens. 56 (3) (2018)
Xiaoxiong Xiong, Aisheng Wu, Amit Angal, Kwo-Fu Chiang, James J. Butler
MODIS and VIIRS on-orbit calibration and characterization using observations from spacecraft pitch maneuvers. Earth Observing Systems (2018)
Amit Angal, Xiaoxiong Xiong, Ning Lei, Kevin A. Twedt
Comparison of the MODIS and VIIRS on-board SD and SDSM performance. Earth Observing Systems (2018)
Xiaoxiong Xiong, Changyong Cao, Ning Lei, Kwofu Chiang, Amit Angal, Yonghong Li, Slawomir Blonski, Wenhui Wang, Taeyoung Choi
Early Results from NOAA-20 (JPSS-1) VIIRS On-ORBIT Calibration and Characterization. IGARSS (2018)
Amit Angal, David Moyer, Qiang Ji, Jeff McIntire, Hassan Oudrari, Xiaoxiong Xiong
Prelaunch characterization and performance of JPSS-2 VIIRS reflective solar bands. Earth Observing Systems (2018)
Qiaozhen Mu, Aisheng Wu, Xiaoxiong Xiong, David R. Doelling, Amit Angal, Tiejun Chang, Rajendra Bhatt
Optimization of a Deep Convective Cloud Technique in Evaluating the Long-Term Radiometric Stability of MODIS Reflective Solar Bands. Remote. Sens. 9 (6) (2017)
Tiejun Chang, Xiaoxiong Xiong, Amit Angal, Aisheng Wu, Xu Geng
Aqua and Terra MODIS RSB Calibration Comparison Using BRDF Modeled Reflectance. IEEE Trans. Geosci. Remote. Sens. 55 (4) (2017)
Amit Angal, Xiaoxiong Xiong, Aisheng Wu
Monitoring the On-Orbit Calibration of Terra MODIS Reflective Solar Bands Using Simultaneous Terra MISR Observations. IEEE Trans. Geosci. Remote. Sens. 55 (3) (2017)
Xiaoxiong Xiong, Amit Angal, Aisheng Wu, Zhipeng Wang, William Barnes, Vincent V. Salomonson
15 Years of Aqua MODIS on-orbit operation, calibration, and performance. IGARSS (2017)
Aisheng Wu, Xu Geng, Andrew Wald, Amit Angal, Xiaoxiong Xiong
Assessment of Terra MODIS On-Orbit Polarization Sensitivity Using Pseudoinvariant Desert Sites. IEEE Trans. Geosci. Remote. Sens. 55 (7) (2017)
Kevin A. Twedt, Amit Angal, Xiaoxiong Xiong, Xu Geng, Hongda Chen
MODIS solar diffuser degradation at short-wave infrared band wavelengths. Earth Observing Systems (2017)
Hongda Chen, Xiaoxiong Xiong, Amit Angal, Kevin A. Twedt
On-Orbit Characterization of the MODIS SDSM Screen for Solar Diffuser Degradation Estimation. IEEE Trans. Geosci. Remote. Sens. 55 (11) (2017)
Amit Angal, Joel McCorkel, Kurt J. Thome
Results from source-based and detector-based calibrations of a CLARREO calibration demonstration system. Earth Observing Systems (2016)
Yonghong Li, Amit Angal, Aisheng Wu, Xu Geng, Daniel Link, Xiaoxiong (Jack) Xiong
Calibration improvements in the detector-to-detector differences for the MODIS ocean color bands. Earth Observing Systems (2016)
Kurtis J. Thome, Joel McCorkel, Amit Angal
Demonstrating the error budget for the climate absolute radiance and refractivity observatory through solar irradiance measurements (Conference Presentation). Earth Observing Systems (2016)
Yonghong Li, Amit Angal, Na Chen, Xu Geng, Daniel Link, Zhipeng Wang, Aisheng Wu, Xiaoxiong (Jack) Xiong
Improvement in the characterization of MODIS subframe difference. Earth Observing Systems (2016)
Qiaozhen Mu, Aisheng Wu, Tiejun Chang, Amit Angal, Daniel Link, Xiaoxiong Xiong, David R. Doelling, Rajendra Bhatt
Assessment of MODIS on-orbit calibration using a deep convective cloud technique. Earth Observing Systems (2016)
Amit Angal, Joel McCorkel, Kurt J. Thome
Evaluation of GLAMR-based calibration for SI-traceable field reflectance retrievals. Earth Observing Systems (2016)
Xiaoxiong Xiong, Amit Angal, Aisheng Wu, William Barnes, Vince Salomonson
Terra and Aqua MODIS instrument performance. IGARSS (2016)
Xiaoxiong Xiong, Jon Fulbright, Amit Angal, Zhipeng Wang, Xu Geng, Jim Butler
Assessment of MODIS and VIIRS solar diffuser on-orbit degradation. Earth Observing Systems (2015)
Amit Angal, Joel McCorkel, Bruce D. Cook, Lawrence A. Corp, Kurt J. Thome
Radiometric calibration of G-LiHT's imaging spectrometer using GLAMR for satellite sensor intercalibration. Earth Observing Systems (2015)
Xiaoxiong Xiong, Amit Angal, Jon Fulbright, Ning Lei, Qiaozhen Mu, Zhipeng Wang, Aisheng Wu
Calibration improvements for MODIS and VIIRS SWIR spectral bands. Earth Observing Systems (2015)
Aisheng Wu, X. Chen, Amit Angal, Yonghong Li, Xiaoxiong Xiong
Assessment of the Collection 6 Terra and Aqua MODIS bands 1 and 2 calibration performance. Earth Observing Systems (2015)
Amit Angal, Xiaoxiong Xiong, Xu Geng, Junqiang Sun
Monitoring the Terra and Aqua MODIS RSB calibration using scattered light from the Nadir-port. Earth Observing Systems (2014)
Xiaoxiong Xiong, Amit Angal, Sriharsha Madhavan, Daniel Link, Xu Geng, Brian Wenny, Aisheng Wu, Hongda Chen, Vince Salomonson
MODIS instrument operation and calibration improvements. IGARSS (2014)
Junqiang Sun, Xiaoxiong Xiong, Amit Angal, Hongda Chen, Aisheng Wu, Xu Geng
Time-Dependent Response Versus Scan Angle for MODIS Reflective Solar Bands. IEEE Trans. Geosci. Remote. Sens. 52 (6) (2014)
Hongda Chen, Xiaoxiong Xiong, Amit Angal, Xu Geng, Aisheng Wu
Progress on alternative method of the on-orbit RVS characterization for MODIS reflective solar bands. Earth Observing Systems (2014)
Nischal Mishra, Dennis L. Helder, Amit Angal, Jason Choi, Xiaoxiong Xiong
Absolute Calibration of Optical Satellite Sensors Using Libya 4 Pseudo Invariant Calibration Site. Remote. Sens. 6 (2) (2014)
Amit Angal, Nischal Mishra, Xiaoxiong Xiong, Dennis L. Helder
Cross-calibration of Landsat 5 TM and Landsat 8 OLI with Aqua MODIS using PICS. Earth Observing Systems (2014)
Xu Geng, Amit Angal, Junqiang Sun, Hongda Chen, Aisheng Wu, Yonghong Li, Daniel Link, Xiaoxiong Xiong
Status of time-dependent response versus scan-angle (RVS) for Terra and Aqua MODIS reflective solar bands. Earth Observing Systems (2014)
Aisheng Wu, Amit Angal, Xiaoxiong Xiong
Comparison of coincident MODIS and MISR reflectances over the 15-year period of EOS Terra. Earth Observing Systems (2014)
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
Status of Terra MODIS operation, calibration, and performance. Earth Observing Systems (2014)
Aisheng Wu, Xiaoxiong Xiong, David R. Doelling, Daniel L. Morstad, Amit Angal, Rajendra Bhatt
Characterization of Terra and Aqua MODIS VIS, NIR, and SWIR Spectral Bands' Calibration Stability. IEEE Trans. Geosci. Remote. Sens. 51 (7-2) (2013)
Gyanesh Chander, Nischal Mishra, Dennis L. Helder, David Aaron, Amit Angal, Taeyoung Choi, Xiaoxiong Xiong, David R. Doelling
Applications of Spectral Band Adjustment Factors (SBAF) for Cross-Calibration. IEEE Trans. Geosci. Remote. Sens. 51 (3-1) (2013)
Dennis L. Helder, Kurtis J. Thome, Nischal Mishra, Gyanesh Chander, Xiaoxiong Xiong, Amit Angal, Taeyoung Choi
Absolute Radiometric Calibration of Landsat Using a Pseudo Invariant Calibration Site. IEEE Trans. Geosci. Remote. Sens. 51 (3-1) (2013)
Aisheng Wu, Xiaoxiong Xiong, Amit Angal
Derive a MODIS-Based Calibration for the AVHRR Reflective Solar Channels of the NOAA KLM Operational Satellites. IEEE Trans. Geosci. Remote. Sens. 51 (3-1) (2013)
Amit Angal, Xiaoxiong Xiong, Aisheng Wu, Gyanesh Chander, Taeyoung Choi
Multitemporal Cross-Calibration of the Terra MODIS and Landsat 7 ETM+ Reflective Solar Bands. IEEE Trans. Geosci. Remote. Sens. 51 (4-1) (2013)
Xiaoxiong Xiong, Brian Wenny, Amit Angal, Junqiang Sun, Vincent V. Salomonson, William Barnes
Status of MODIS instrument and radiometric calibration. IGARSS (2013)
Gyanesh Chander, Amit Angal, Taeyoung Choi, Xiaoxiong Xiong
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. 6 (2-1) (2013)
Xiaoxiong Xiong, Bruce Guenther, Amit Angal, William Barnes, Vince Salomonson, Junqiang Sun, Brian Wenny
MODIS radiometric calibration program, methods and results. IGARSS (2012)
David Moyer, Evan Haas, Jon Fulbright, Hassan Oudrari, Xiaoxiong Xiong, Amit Angal, Stephen Mills, Lushalan Liao, Frank De Luccia, Kameron Rausch
NPP VIIRS early on-orbit solar diffuser degradation results. IGARSS (2012)
Xiaoxiong Xiong, Brian Wenny, Amit Angal, William Barnes, Vince Salomonson
Summary of Terra and Aqua MODIS long-term performance. IGARSS (2011)
Gyanesh Chander, Nischal Mishra, Dennis L. Helder, David Aaron, Taeyoung Choi, Amit Angal, Xiaoxiong Xiong
Use of EO-1 Hyperion data to calculate spectral band adjustment factors (SBAF) between the L7 ETM+ and Terra MODIS sensors. IGARSS (2010)
Amit Angal, Gyanesh Chander, Taeyoung Choi, Aisheng Wu, Xiaoxiong Xiong
The use of the Sonoran Desert as a pseudo-invariant site for optical sensor cross-calibration and long-term stability monitoring. IGARSS (2010)
Taeyoung Choi, Xiaoxiong Xiong, Gyanesh Chander, Amit Angal
Assessment of the Short-term Radiometric Stability between Terra MODIS and Landsat 7 ETM+ Sensors. IGARSS (4) (2009)
Gyanesh Chander, Xiaoxiong Xiong, Amit Angal, Taeyoung Choi
An Assessment of African Test Sites in the Context of a Global Network of Quality-assured Reference Standards. IGARSS (5) (2009)
Xiaoxiong (Jack) Xiong, Junqiang Sun, Nianzen Che, Amit Angal, Taeyoung (Jason) Choi
Comparison of Terra and Aqua MODIS VIS Bands On-Orbit Response. IGARSS (4) (2008)
Amit Angal, Taeyoung (Jason) Choi, Gyanesh Chander, Xiaoxiong (Jack) Xiong
Monitoring On-Orbit Stability of Terra MODIS and Landsat 7 ETM+ Reflective Solar Bands using Railroad Valley Playa, Nevada(RVPN) Test Site. IGARSS (4) (2008)
Xiaoxiong (Jack) Xiong, Amit Angal, Xiaobo Xie
On-Orbit Noise Characterization for MODIS Reflective Solar Bands. IGARSS (4) (2008)