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Proceedings Paper

Tracking on-orbit stability of the response versus scan angle for the S-NPP VIIRS reflective solar bands
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Paper Abstract

Built on strong heritage of the MODIS (Moderate Resolution Imaging Spectroradiometer) sensor, the Visible Infrared Imaging Radiometer Suite (VIIRS) carried on Suomi NPP (National Polar-orbiting Partnership) satellite (http://npp.gsfc.nasa.gov/viirs.html) has been in operation for nearly five fives. The on-board calibration of the VIIRS reflective solar bands (RSB) relies on a solar diffuser (SD) located at a fixed scan angle and a solar diffuser stability monitor (SDSM). The VIIRS response versus scan angle (RVS) was characterized prelaunch in lab ambient conditions and is currently used to determine the on orbit response for all scan angles relative to the SD scan angle. Since the RVS is vitally important to the quality of calibrated level 1B products, it is important to monitor its on-orbit stability. In this study, the RVS stability is examined based on reflectance trends collected from 16-day repeatable orbits over preselected pseudo-invariant desert sites in Northern Africa. These trends cover nearly entire Earth view scan range so that any systematic drifts in the scan angle direction would indicate a change in RVS. This study also compares VIIRS RVS on-orbit stability results with those from Aqua and Terra MODIS over the first four years of mission for a few selected bands, which provides further information on potential VIIRS RVS on-orbit changes.

Paper Details

Date Published: 19 September 2016
PDF: 10 pages
Proc. SPIE 9972, Earth Observing Systems XXI, 99721C (19 September 2016); doi: 10.1117/12.2238106
Show Author Affiliations
Aisheng Wu, Science Systems and Applications, Inc. (United States)
Xiaoxiong (Jack) Xiong, NASA Goddard Space Flight Ctr. (United States)
Changyong Cao, NOAA National Environmental Satellite, Data, and Information Service (United States)


Published in SPIE Proceedings Vol. 9972:
Earth Observing Systems XXI
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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