Preliminary assessment of Suomi-NPP VIIRS on-orbit radiometric performance

Hassan Oudrari; Jeff McIntire; David Moyer; Kwofu Chiang; Xiaoxiong Xiong; James Butler

doi:10.1117/12.930498

15 October 2012 Preliminary assessment of Suomi-NPP VIIRS on-orbit radiometric performance

Hassan Oudrari, Jeff McIntire, David Moyer, Kwofu Chiang, Xiaoxiong Xiong, James Butler

Proceedings Volume 8510, Earth Observing Systems XVII; 851011 (2012) https://doi.org/10.1117/12.930498
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

The Visible-Infrared Imaging Radiometer Suite (VIIRS) is a key instrument on-board the Suomi National Polarorbiting Partnership (NPP) spacecraft that was launched on October 28th 2011. VIIRS was designed to provide moderate and imaging resolution of the planet Earth twice daily. It is a wide-swath (3,040 km) cross-track scanning radiometer with spatial resolutions of 375 m and 750 m at nadir for imaging and moderate bands, respectively. It has 22 spectral bands covering the spectrum between 0.4 μm and 12.5 μm, including 14 reflective solar bands (RSB), 7 thermal emissive bands (TEB), and 1 day-night band (DNB). VIIRS observations are used to generate 22 environmental data record (EDRs). This paper will briefly describe NPP VIIRS calibration strategies performed by the independent government team, for the initial on-orbit Intensive Calibration and Validation (ICV) activities. In addition, this paper will provide an early assessment of the sensor on-orbit radiometric performance, such as the sensor signal to noise ratios (SNRs), dual gain transition verification, dynamic range and linearity, reflective bands calibration based on the solar diffuser (SD) and solar diffuser stability monitor (SDSM), emissive bands calibration based on the on-board blackbody calibration (OBC), and cross-comparison with MODIS. A comprehensive set of performance metrics generated during the pre-launch testing program will be compared to VIIRS early on-orbit performance, and a plan for future cal/val activities and performance enhancements will be presented.

Citation Download Citation

Hassan Oudrari, Jeff McIntire, David Moyer, Kwofu Chiang, Xiaoxiong Xiong, and James Butler "Preliminary assessment of Suomi-NPP VIIRS on-orbit radiometric performance", Proc. SPIE 8510, Earth Observing Systems XVII, 851011 (15 October 2012); https://doi.org/10.1117/12.930498

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