Modeling the detector radiometric response gains of the Suomi NPP VIIRS reflective solar bands

被引：13

作者：

Lei, Ning ^{[1
]}

Wang, Zhipeng ^{[1
]}

Guenther, Bruce ^{[2
]}

Xiong, Xiaoxiong ^{[3
]}

Gleason, James ^{[3
]}

机构：

[1] Sigma Space Corp, 4600 Forbes Blvd, Lanham, MD 20706 USA

[2] Stellar Solut, Chantilly, VA 20151 USA

[3] NASA Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

SENSORS, SYSTEMS, AND NEXT-GENERATION SATELLITES XVI | 2012年 / 8533卷

关键词：

remote sensing; radiance; calibration; VIIRS; RSB; radiometric; Solar Diffuser; F-factor; degradation; tungsten oxide;

D O I：

10.1117/12.974728

中图分类号：

TP7 [遥感技术];

学科分类号：

081102 ; 0816 ; 081602 ; 083002 ; 1404 ;

摘要：

Right after the opening of the NADIR door of the Visible/Infrared Imager/Radiometer Suite (VIIRS) aboard the Suomi National Polar-orbiting Partnership (NPP) satellite, the detector gains of the Near InfraRed (NIR) bands have decreased much faster than expected, indicating large degradation of the VIIRS sensor optical system. To determine the root cause and to access the potential outcome of the degradation, we developed a mathematical model based on physical hypotheses on the optical system, especially the Rotating Telescope Assembly mirror surfaces. Current detector gains are consistent with a model of a four-mirror system, with each mirror having a thin contaminant layer of material that reduces the mirror transmission and the reduction is activated by solar radiation. The ratios of the reduced transmission coefficients are in good agreement with those from the reflectance measurement of the Traveling Witness Mirror (after exposure of ultraviolet light from a test lamp) independently carried out as part of the degradation anomaly investigation. In this Proceeding, we describe the mathematical model and discuss the results.

引用

页数：11

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