S-NPP VIIRS thermal emissive bands on-orbit calibration and performance

被引：36

作者：

Efremova, Boryana ^{[1
]}

McIntire, Jeff ^{[1
]}

Moyer, David ^{[2
]}

Wu, Aisheng ^{[1
]}

Xiong, Xiaoxiong ^{[3
]}

机构：

[1] Sigma Space Corp, Lanham, MD 20706 USA

[2] Aerosp Corp, El Segundo, CA 90245 USA

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

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2014年 / 119卷 / 18期

基金：

美国海洋和大气管理局;

关键词：

PRODUCTS;

D O I：

10.1002/2014JD022078

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Presented is an assessment of the on-orbit radiometric performance of the thermal emissive bands (TEB) of the Suomi National Polar-orbiting Partnership (S-NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) instrument based on data from the first 2 years of operations-from 20 January 2012 to 20 January 2014. The VIIRS TEB are calibrated on orbit using a V-grooved blackbody (BB) as a radiance source. Performance characteristics trended over the life of the mission include the F factor-a measure of the gain change of the TEB detectors; the Noise Equivalent differential Temperature (NEdT)-a measure of the detector noise; and the detector offset and nonlinear terms trended at the quarterly performed BB warm-up cool-down cycles. We find that the BB temperature is well controlled and stable within the 30mK requirement. The F factor trends are very stable and showing little degradation (within 0.8%). The offsets and nonlinearity terms are also without noticeable drifts. NEdT is stable and does not show any trend. Other TEB radiometric calibration-related activities discussed include the on-orbit assessment of the response versus scan-angle functions and an approach to improve the M13 low-gain calibration using onboard lunar measurements. We conclude that all the assessed parameters comply with the requirements, and the TEB provide radiometric measurements with the required accuracy.

引用

页码：10859 / 10875

页数：17