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Initial On-Orbit Radiometric Calibration of the Suomi NPP VIIRS Reflective Solar Bands
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Author and Affiliation:
Lei, Ning(Sigma Space Corp., Lanham, MD, United States);
Wang, Zhipeng(Sigma Space Corp., Lanham, MD, United States);
Fulbright, Jon(Sigma Space Corp., Lanham, MD, United States);
Lee, Shihyan(Sigma Space Corp., Lanham, MD, United States);
McIntire, Jeff(Sigma Space Corp., Lanham, MD, United States);
Chiang, Vincent(Sigma Space Corp., Lanham, MD, United States);
Xiong, Jack(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: The on-orbit radiometric response calibration of the VISible/Near InfraRed (VISNIR) and the Short-Wave InfraRed (SWIR) bands of the Visible/Infrared Imager/Radiometer Suite (VIIRS) aboard the Suomi National Polar-orbiting Partnership (NPP) satellite is carried out through a Solar Diffuser (SD). The transmittance of the SD screen and the SD's Bidirectional Reflectance Distribution Function (BRDF) are measured before launch and tabulated, allowing the VIIRS sensor aperture spectral radiance to be accurately determined. The radiometric response of a detector is described by a quadratic polynomial of the detector?s digital number (dn). The coefficients were determined before launch. Once on orbit, the coefficients are assumed to change by a common factor: the F-factor. The radiance scattered from the SD allows the determination of the F-factor. In this Proceeding, we describe the methodology and the associated algorithms in the determination of the F-factors and discuss the results.
Publication Date: Aug 12, 2012
Document ID:
20120014247
(Acquired Oct 02, 2012)
Subject Category: INSTRUMENTATION AND PHOTOGRAPHY
Report/Patent Number: GSFC.ABS.6923.2012
Document Type: Conference Paper
Meeting Information: 2012 Optics + Photonics; 12-16 Aug. 2012; San Diego, CA; United States
Meeting Sponsor: International Society for Optical Engineering; Bellingham, WA, United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 8p; In English; Original contains color and black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: CALIBRATING; RADIOMETERS; SATELLITE INSTRUMENTS; INFRARED RADIATION; NEAR INFRARED RADIATION; NPOESS
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