Monitoring On-Orbit Stability of Terra MODIS and Landsat 7 ETM+ Reflective Solar Bands using Railroad Valley Playa, Nevada(RVPN) Test Site. - Amit Angal; Taeyoung (Jason) Choi; Gyanesh Chander; Xiaoxiong (Jack) Xiong (IGARSS (4), 2008)

On-Orbit Noise Characterization for MODIS Reflective Solar Bands. - Xiaoxiong (Jack) Xiong; Amit Angal; Xiaobo Xie (IGARSS (4), 2008)

Comparison of Terra and Aqua MODIS VIS Bands On-Orbit Response. - Xiaoxiong (Jack) Xiong; Junqiang Sun; Nianzen Che; Amit Angal; Taeyoung (Jason) Choi (IGARSS (4), 2008)

An Assessment of African Test Sites in the Context of a Global Network of Quality-assured Reference Standards. - Gyanesh Chander; Xiaoxiong Xiong; Amit Angal; Taeyoung Choi (IGARSS (5), 2009)

Assessment of the Short-term Radiometric Stability between Terra MODIS and Landsat 7 ETM+ Sensors. - Taeyoung Choi; Xiaoxiong Xiong; Gyanesh Chander; Amit Angal (IGARSS (4), 2009)

The use of the Sonoran Desert as a pseudo-invariant site for optical sensor cross-calibration and long-term stability monitoring. - Amit Angal; Gyanesh Chander; Taeyoung Choi; Aisheng Wu; Xiaoxiong Xiong (IGARSS, 2010)

Use of EO-1 Hyperion data to calculate spectral band adjustment factors (SBAF) between the L7 ETM+ and Terra MODIS sensors. - Gyanesh Chander; Nischal Mishra; Dennis L. Helder; David Aaron; Taeyoung Choi; Amit Angal; Xiaoxiong Xiong (IGARSS, 2010)

Summary of Terra and Aqua MODIS long-term performance. - Xiaoxiong Xiong; Brian Wenny; Amit Angal; William L. Barnes; Vince Salomonson (IGARSS, 2011)

NPP VIIRS early on-orbit solar diffuser degradation results. - David Moyer; Evan Haas; Jon Fulbright; Hassan Oudrari; Xiaoxiong Xiong; Amit Angal; Stephen Mills; Lushalan Liao; Frank De Luccia; Kameron Rausch (IGARSS, 2012)

MODIS radiometric calibration program, methods and results. - Xiaoxiong Xiong; Bruce Guenther; Amit Angal; William L. Barnes; Vince Salomonson; Junqiang Sun; Brian Wenny (IGARSS, 2012)

Status of MODIS instrument and radiometric calibration. - Xiaoxiong Xiong; Brian Wenny; Amit Angal; Junqiang Sun; Vincent V. Salomonson; William L. Barnes (IGARSS, 2013)

Radiometric Cross-Calibration of EO-1 ALI With L7 ETM+ and Terra MODIS Sensors Using Near-Simultaneous Desert Observations. - Gyanesh Chander; Amit Angal; Taeyoung Choi; Xiaoxiong Xiong (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2013)

Multitemporal Cross-Calibration of the Terra MODIS and Landsat 7 ETM+ Reflective Solar Bands. - Amit Angal; Xiaoxiong Xiong; Aisheng Wu; Gyanesh Chander; Taeyoung Choi (IEEE Trans. Geosci. Remote. Sens., 2013)

Applications of Spectral Band Adjustment Factors (SBAF) for Cross-Calibration. - Gyanesh Chander; Nischal Mishra; Dennis L. Helder; David Aaron; Amit Angal; Taeyoung Choi; Xiaoxiong Xiong; David R. Doelling (IEEE Trans. Geosci. Remote. Sens., 2013)

Absolute Radiometric Calibration of Landsat Using a Pseudo Invariant Calibration Site. - Dennis L. Helder; Kurtis J. Thome; Nischal Mishra; Gyanesh Chander; Xiaoxiong Xiong; Amit Angal; Taeyoung Choi (IEEE Trans. Geosci. Remote. Sens., 2013)

Derive a MODIS-Based Calibration for the AVHRR Reflective Solar Channels of the NOAA KLM Operational Satellites. - Aisheng Wu; Xiaoxiong Xiong; Amit Angal (IEEE Trans. Geosci. Remote. Sens., 2013)

Characterization of Terra and Aqua MODIS VIS, NIR, and SWIR Spectral Bands' Calibration Stability. - Aisheng Wu; Xiaoxiong Xiong; David R. Doelling; Daniel L. Morstad; Amit Angal; Rajendra Bhatt (IEEE Trans. Geosci. Remote. Sens., 2013)

Cross-calibration of Landsat 5 TM and Landsat 8 OLI with Aqua MODIS using PICS. - Amit Angal; Nischal Mishra; Xiaoxiong Xiong; Dennis L. Helder (Earth Observing Systems, 2014)

Monitoring the Terra and Aqua MODIS RSB calibration using scattered light from the Nadir-port. - Amit Angal; Xiaoxiong Xiong; Xu Geng; Junqiang Sun (Earth Observing Systems, 2014)

Progress on alternative method of the on-orbit RVS characterization for MODIS reflective solar bands. - Hongda Chen 003; Xiaoxiong Xiong; Amit Angal; Xu Geng; Aisheng Wu (Earth Observing Systems, 2014)

Status of time-dependent response versus scan-angle (RVS) for Terra and Aqua MODIS reflective solar bands. - Xu Geng; Amit Angal; Junqiang Sun; Hongda Chen 003; Aisheng Wu; Yonghong Li; Daniel Link 001; Xiaoxiong Xiong (Earth Observing Systems, 2014)

Comparison of coincident MODIS and MISR reflectances over the 15-year period of EOS Terra. - Aisheng Wu; Amit Angal; Xiaoxiong Xiong (Earth Observing Systems, 2014)

Status of Terra MODIS operation, calibration, and performance. - Xiaoxiong Xiong; Brian N. Wenny; Aisheng Wu; Amit Angal; Xu Geng; Hongda Chen 003; Jennifer L. Dodd; Daniel O. Link; Sriharsha Madhavan; Na Chen; Yonghong Li; Sean Iacangelo; et al. (Earth Observing Systems, 2014)

MODIS instrument operation and calibration improvements. - Xiaoxiong Xiong; Amit Angal; Sriharsha Madhavan; Daniel Link 001; Xu Geng; Brian Wenny; Aisheng Wu; Hongda Chen 003; Vince Salomonson (IGARSS, 2014)

Absolute Calibration of Optical Satellite Sensors Using Libya 4 Pseudo Invariant Calibration Site. - Nischal Mishra; Dennis L. Helder; Amit Angal; Jason Choi; Xiaoxiong Xiong (Remote. Sens., 2014)

Time-Dependent Response Versus Scan Angle for MODIS Reflective Solar Bands. - Junqiang Sun; Xiaoxiong Xiong; Amit Angal; Hongda Chen 003; Aisheng Wu; Xu Geng (IEEE Trans. Geosci. Remote. Sens., 2014)

Radiometric calibration of G-LiHT's imaging spectrometer using GLAMR for satellite sensor intercalibration. - Amit Angal; Joel McCorkel; Bruce D. Cook; Lawrence A. Corp; Kurt J. Thome (Earth Observing Systems, 2015)

Assessment of the Collection 6 Terra and Aqua MODIS bands 1 and 2 calibration performance. - Aisheng Wu; X. Chen; Amit Angal; Yonghong Li; Xiaoxiong Xiong (Earth Observing Systems, 2015)

Calibration improvements for MODIS and VIIRS SWIR spectral bands. - Xiaoxiong Xiong; Amit Angal; Jon Fulbright; Ning Lei; Qiaozhen Mu; Zhipeng Wang 001; Aisheng Wu (Earth Observing Systems, 2015)

Assessment of MODIS and VIIRS solar diffuser on-orbit degradation. - Xiaoxiong Xiong; Jon Fulbright; Amit Angal; Zhipeng Wang 001; Xu Geng; Jim Butler 001 (Earth Observing Systems, 2015)

Results from source-based and detector-based calibrations of a CLARREO calibration demonstration system. - Amit Angal; Joel McCorkel; Kurt J. Thome (Earth Observing Systems, 2016)

Evaluation of GLAMR-based calibration for SI-traceable field reflectance retrievals. - Amit Angal; Joel McCorkel; Kurt J. Thome (Earth Observing Systems, 2016)

Improvement in the characterization of MODIS subframe difference. - Yonghong Li; Amit Angal; Na Chen; Xu Geng; Daniel Link 001; Zhipeng Wang 001; Aisheng Wu; Xiaoxiong (Jack) Xiong (Earth Observing Systems, 2016)

Calibration improvements in the detector-to-detector differences for the MODIS ocean color bands. - Yonghong Li; Amit Angal; Aisheng Wu; Xu Geng; Daniel Link 001; Xiaoxiong (Jack) Xiong (Earth Observing Systems, 2016)

Assessment of MODIS on-orbit calibration using a deep convective cloud technique. - Qiaozhen Mu; Aisheng Wu; Tiejun Chang; Amit Angal; Daniel Link 001; Xiaoxiong Xiong; David R. Doelling; Rajendra Bhatt (Earth Observing Systems, 2016)

Demonstrating the error budget for the climate absolute radiance and refractivity observatory through solar irradiance measurements (Conference Presentation). - Kurtis J. Thome; Joel McCorkel; Amit Angal (Earth Observing Systems, 2016)

Terra and Aqua MODIS instrument performance. - Xiaoxiong Xiong; Amit Angal; Aisheng Wu; William L. Barnes; Vince Salomonson (IGARSS, 2016)

MODIS solar diffuser degradation at short-wave infrared band wavelengths. - Kevin A. Twedt; Amit Angal; Xiaoxiong Xiong; Xu Geng; Hongda Chen 003 (Earth Observing Systems, 2017)

15 Years of Aqua MODIS on-orbit operation, calibration, and performance. - Xiaoxiong Xiong; Amit Angal; Aisheng Wu; Zhipeng Wang 001; William L. Barnes; Vincent V. Salomonson (IGARSS, 2017)

Optimization of a Deep Convective Cloud Technique in Evaluating the Long-Term Radiometric Stability of MODIS Reflective Solar Bands. - Qiaozhen Mu; Aisheng Wu; Xiaoxiong Xiong; David R. Doelling; Amit Angal; Tiejun Chang; Rajendra Bhatt (Remote. Sens., 2017)

Monitoring the On-Orbit Calibration of Terra MODIS Reflective Solar Bands Using Simultaneous Terra MISR Observations. - Amit Angal; Xiaoxiong Xiong; Aisheng Wu (IEEE Trans. Geosci. Remote. Sens., 2017)

Aqua and Terra MODIS RSB Calibration Comparison Using BRDF Modeled Reflectance. - Tiejun Chang; Xiaoxiong Xiong; Amit Angal; Aisheng Wu; Xu Geng (IEEE Trans. Geosci. Remote. Sens., 2017)

On-Orbit Characterization of the MODIS SDSM Screen for Solar Diffuser Degradation Estimation. - Hongda Chen 003; Xiaoxiong Xiong; Amit Angal; Kevin A. Twedt (IEEE Trans. Geosci. Remote. Sens., 2017)

Assessment of Terra MODIS On-Orbit Polarization Sensitivity Using Pseudoinvariant Desert Sites. - Aisheng Wu; Xu Geng; Andrew Wald; Amit Angal; Xiaoxiong Xiong (IEEE Trans. Geosci. Remote. Sens., 2017)

On-orbit performance of the Terra and Aqua MODIS solar diffuser stability monitor. - Emily J. Aldoretta; Kevin A. Twedt; Amit Angal; Hongda Chen 003; Xiaoxiong Xiong (Earth Observing Systems, 2018)

Prelaunch characterization and performance of JPSS-2 VIIRS reflective solar bands. - Amit Angal; David Moyer; Qiang Ji; Jeff McIntire; Hassan Oudrari; Xiaoxiong Xiong (Earth Observing Systems, 2018)

Comparison of the MODIS and VIIRS on-board SD and SDSM performance. - Amit Angal; Xiaoxiong Xiong; Ning Lei; Kevin A. Twedt (Earth Observing Systems, 2018)

Methods of Earth-view-based calibration of the response versus scan angle of the MODIS reflective solar bands. - Kevin A. Twedt; Hongda Chen 003; Xiaoxiong Xiong; Amit Angal; Xu Geng; Aisheng Wu (Earth Observing Systems, 2018)

Effects of time-varying relative spectral response on the calibration of MODIS reflective solar bands. - Kevin A. Twedt; Amit Angal; Xiaoxiong Xiong (Earth Observing Systems, 2018)

MODIS and VIIRS on-orbit calibration and characterization using observations from spacecraft pitch maneuvers. - Xiaoxiong Xiong; Aisheng Wu; Amit Angal; Kwo-Fu Chiang; James J. Butler 001 (Earth Observing Systems, 2018)

Early Results from NOAA-20 (JPSS-1) VIIRS On-ORBIT Calibration and Characterization. - Xiaoxiong Xiong; Changyong Cao; Ning Lei; Kwofu Chiang; Amit Angal; Yonghong Li; Slawomir Blonski; Wenhui Wang 002; Taeyoung Choi (IGARSS, 2018)

An Overall Assessment of JPSS-2 VIIRS Radiometric Performance Based on Pre-Launch Testing. - Hassan Oudrari; Jeff McIntire; Xiaoxiong Xiong; James J. Butler 001; Qiang Ji; Thomas Schwarting; Amit Angal (Remote. Sens., 2018)

Results From the Deep Convective Clouds-Based Response Versus Scan-Angle Characterization for the MODIS Reflective Solar Bands. - Amit Angal; Xiaoxiong Xiong; Qiaozhen Mu; David R. Doelling; Rajendra Bhatt; Aisheng Wu (IEEE Trans. Geosci. Remote. Sens., 2018)

Improvements in the On-Orbit Response Versus Scan Angle Characterization of the Aqua MODIS Reflective Solar Bands. - Amit Angal; Xiaoxiong Xiong; Aisheng Wu; Xu Geng; Hongda Chen 003 (IEEE Trans. Geosci. Remote. Sens., 2018)

NOAA-20 VIIRS On-Orbit Calibration and Performance Update. - Xiaoxiong Xiong; Amit Angal; James J. Butler 001; Kwofu Chiang; Ning Lei; Yonghong Li; Kevin A. Twedt (IGARSS, 2019)

Empirical Absolute Calibration Model for Multiple Pseudo-Invariant Calibration Sites. - Bipin Raut; Morakot Kaewmanee; Amit Angal; Xiaoxiong Xiong; Dennis L. Helder (Remote. Sens., 2019)

New Approach for Temporal Stability Evaluation of Pseudo-Invariant Calibration Sites (PICS). - Fatima Tuz Zafrin Tuli; Cibele Teixeira Pinto; Amit Angal; Xiaoxiong Xiong; Dennis L. Helder (Remote. Sens., 2019)

Early Calibration and Performance Assessments of NOAA-20 VIIRS Thermal Emissive Bands. - Yonghong Li; Xiaoxiong Xiong; Jeff McIntire; Amit Angal; Sergey Gusev; Kwo-Fu Chiang (IEEE Trans. Geosci. Remote. Sens., 2019)

Surface Roughness-Induced Spectral Degradation of Multi-Spaceborne Solar Diffusers Due to Space Radiation Exposure. - Xi Shao; Tung-Chang Liu; Xiaoxiong Xiong; Changyong Cao; Taeyoung Choi; Amit Angal (IEEE Trans. Geosci. Remote. Sens., 2019)

MODIS Reflective Solar Bands On-Orbit Calibration and Performance. - Xiaoxiong Xiong; Amit Angal; Kevin A. Twedt; Hongda Chen 003; Daniel Link 001; Xu Geng; Emily J. Aldoretta; Qiaozhen Mu (IEEE Trans. Geosci. Remote. Sens., 2019)

NOAA-20 VIIRS on-Orbit Calibration Improvements. - 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; et al. (IGARSS, 2020)

MODIS and VIIRS Calibration and Characterization in Support of Producing Long-Term High-Quality Data Products. - Xiaoxiong Xiong; Amit Angal; Tiejun Chang; Kwo-Fu Chiang; Ning Lei; Yonghong Li; Junqiang Sun; Kevin A. Twedt; Aisheng Wu (Remote. Sens., 2020)

Stability Assessment of OCO-2 Radiometric Calibration Using Aqua MODIS as a Reference. - Shanshan Yu; Robert Rosenberg; Carol J. Bruegge; Lars Chapsky; Dejian Fu; Richard A. Lee 002; Thomas E. Taylor; Heather Cronk; Christopher W. O'Dell; Amit Angal; Xiaoxiong Xiong; David Crisp; et al. (Remote. Sens., 2020)

On-Orbit Calibration of Terra MODIS VIS Bands Using Polarization-Corrected Desert Observations. - Amit Angal; Xu Geng; Xiaoxiong Xiong; Kevin A. Twedt; Aisheng Wu; Daniel O. Link; Emily J. Aldoretta (IEEE Trans. Geosci. Remote. Sens., 2020)

Cross-Calibration of MODIS Reflective Solar Bands With Sentinel 2A/2B MSI Instruments. - Amit Angal; Xiaoxiong Xiong; Ashish Shrestha (IEEE Trans. Geosci. Remote. Sens., 2020)

Response Versus Scan-Angle Assessment of MODIS Reflective Solar Bands in Collection 6.1 Calibration. - Rajendra Bhatt; David R. Doelling; Amit Angal; Xiaoxiong Xiong; Conor O. Haney; Benjamin R. Scarino; Aisheng Wu; Arun Gopalan (IEEE Trans. Geosci. Remote. Sens., 2020)

Orbital Path and Spacecraft Attitude Correction for the MODIS Lunar Spatial Characterization. - Truman Wilson; Amit Angal; Xiaoxiong Xiong (IEEE Trans. Geosci. Remote. Sens., 2020)

Cross-Calibration of Terra and Aqua MODIS Using RadCalNet. - Amit Angal; Xiaoxiong Xiong; Kurtis J. Thome; Brian N. Wenny (IEEE Geosci. Remote. Sens. Lett., 2021)

Ten Years of SNPP VIIRS Reflective Solar Bands On-Orbit Calibration and Performance. - Junqiang Sun; Xiaoxiong Xiong; Ning Lei; Sherry Li; Kevin A. Twedt; Amit Angal (Remote. Sens., 2021)

Performance of NOAA-20 VIIRS Solar Diffuser and Solar Diffuser Stability Monitor. - Ning Lei; Kevin A. Twedt; Xiaoxiong Xiong; Amit Angal (IEEE Trans. Geosci. Remote. Sens., 2021)

An Overall Assessment of JPSS-3 VIIRS Radiometric Performance Based on Pre-Launch Testing. - Jeff McIntire; Xiaoxiong Xiong; James J. Butler 001; Amit Angal; David Moyer; Qiang Ji; Thomas Schwarting; Daniel O. Link; Chengbo Sun (Remote. Sens., 2022)

JPSS-1 VIIRS Prelaunch Reflective Solar Band Testing and Performance. - David Moyer; Amit Angal; Hassan Oudrari; Evan Haas; Qiang Ji; Frank De Luccia; Xiaoxiong Xiong (Remote. Sens., 2022)

An Assessment of SNPP and NOAA20 VIIRS RSB Calibration Performance in NASA SIPS Reprocessed Collection-2 L1B Data Products. - Aisheng Wu; Xiaoxiong Xiong; Rajendra Bhatt; Conor O. Haney; David R. Doelling; Amit Angal; Qiaozhen Mu (Remote. Sens., 2022)

Calibration Inter-Comparison of MODIS and VIIRS Reflective Solar Bands Using Lunar Observations. - Xiaoxiong Xiong; Junqiang Sun; Amit Angal; Truman Wilson (Remote. Sens., 2022)

Unscheduled Lunar Observations for Radiometric Characterization of VIIRS Reflective Solar Bands. - Amit Angal; Xiaoxiong Xiong; Truman Wilson (IEEE Trans. Geosci. Remote. Sens., 2022)

Nonlinear Detector Response of Aqua MODIS Land Imaging Bands. - Kevin A. Twedt; Sarah Henderson; Xiaoxiong Xiong; Amit Angal; Xu Geng (IEEE Trans. Geosci. Remote. Sens., 2022)

On-Orbit Calibration and Performance of NOAA-20 VIIRS Reflective Solar Bands. - Kevin A. Twedt; Ning Lei; Xiaoxiong Xiong; Amit Angal; Sherry Li; Tiejun Chang; Junqiang Sun (IEEE Trans. Geosci. Remote. Sens., 2022)

JPSS-2 VIIRS Pre-Launch Reflective Solar Band Testing and Performance. - David Moyer; Amit Angal; Qiang Ji; Jeff McIntire; Xiaoxiong Xiong (Remote. Sens., 2022)

Status of the Terra and Aqua Modis Collection 7 L1B. - Amit Angal; Xiaoxiong Xiong; Kevin A. Twedt; Tiejun Chang; Xu Geng; Emily J. Aldoretta; Carlos L. Pérez Díaz (IGARSS, 2023)

Assessment of the Modis Scan Mirror on-Orbit Response Changes. - Kevin A. Twedt; Amit Angal; Tiejun Chang; Xiaoxiong Xiong (IGARSS, 2023)

Early Results from NOAA-21 (JPSS-2) VIIRS on-Orbit Calibration. - Xiaoxiong Xiong; Amit Angal; Junqiang Sun; Ning Lei; Kevin A. Twedt; Kwo-Fu Chiang (IGARSS, 2023)

Assessment of the Radiometric Calibration Consistency of Reflective Solar Bands between Terra and Aqua MODIS in Upcoming Collection-7 L1B. - Aisheng Wu; Xiaoxiong Xiong; Amit Angal; Qiaozhen Mu; Sherry Li (Remote. Sens., 2023)

NOAA-21 VIIRS on-Orbit Calibration Performance: Year 1. - Xiaoxiong Xiong; Amit Angal; Ning Lei; Kwofu Chiang; Kevin A. Twedt; Hongda Chen 003 (IGARSS, 2024)

Prelaunch Reflective Solar Band Radiometric Performance of JPSS-3 and -4 VIIRS. - Amit Angal; David Moyer; Xiaoxiong Xiong; Qiang Ji; Daniel Link 001 (Remote. Sens., 2024)

Pre-Launch Thermal Emissive Band Radiometric Performance for JPSS-3 and -4 VIIRS. - David Moyer; Amit Angal; Jeff McIntire; Xiaoxiong Xiong (Remote. Sens., 2024)

Development of an Uncertainty Budget for a Disseminated Lunar Irradiance Scale Over the Visible to Near-Infrared Spectral Region. - Steven W. Brown; Truman Wilson; Xiaoxiong Xiong; John T. Woodward; Amit Angal; Junqiang Sun (IEEE Trans. Geosci. Remote. Sens., 2024)

Pre-Launch Polarization Assessment of JPSS-3 and -4 VIIRS VNIR Bands and Comparison with Previous Builds. - David Moyer; Jeff McIntire; Amit Angal; Xiaoxiong Xiong (Remote. Sens., 2024)

Early Radiometric Assessment of NOAA-21 Visible Infrared Imaging Radiometer Suite Reflective Solar Bands Using Vicarious Techniques. - Aisheng Wu; Xiaoxiong Xiong; Qiaozhen Mu; Amit Angal; Rajendra Bhatt; Yolanda Shea (Remote. Sens., 2024)

Early Mission Calibration Performance of NOAA-21 VIIRS Reflective Solar Bands. - Ning Lei; Xiaoxiong Xiong; Kevin A. Twedt; Sherry Li; Tiejun Chang; Qiaozhen Mu; Amit Angal (Remote. Sens., 2024)