Validation results from a reflectance-based field campaign at the Salar de Uyuni in Bolivia (September 2018) are presented for GOES-17 and GOES-16 Advanced Baseline Imagers (ABI) reflective channels. The in situ measurements were used to characterize the surface reflectance and the atmosphere in order to constrain a radiative transfer model and predict the reflectance at the top of the atmosphere (TOA), which was then compared to the ABI measurements. The field campaign provides TOA reflectance estimates over several days, allowing assessment of the calibration accuracy and stability of channels 1, 2, 3, 5 and 6 for GOES-17 and GOES-16 ABI. Channel 1 of GOES-17 ABI shows -5.5% bias in comparison to the ground-based predicted TOA. Over 6% bias in GOES-17 B2 was confirmed. A comparison to NOAA-20 VIIRS was also carried on during a near nadir overpass.
|Title of host publication||Earth Observing Systems XXV|
|Editors||James J. Butler, Xiaoxiong Xiong, Xingfa Gu|
|State||Published - 2020|
|Event||Earth Observing Systems XXV 2020 - Virtual, Online, United States|
Duration: 24 Aug 2020 → 4 Sep 2020
|Name||Proceedings of SPIE - The International Society for Optical Engineering|
|Conference||Earth Observing Systems XXV 2020|
|Period||24/08/20 → 4/09/20|
Bibliographical noteFunding Information:
The authors would like to acknowledge: the GOES-R Flight Project and Landsat 9 TIRS-2 Project for travel funding support; the Remote Sensing Group Laboratory, University of Arizona - for calibration of the reference panel; Brent Holben and AERONET team for training and loan of sun photometer for atmospheric characterization. In addition, we would like to thank the US Embassy in Bolivia for their invaluable logistic support, and Hertz-Bolivia for its excellent service.
© 2020 SPIE.
- GOES-16 ABI
- GOES-17 ABI
- NOAA-20 VIIRS