Paper Info
Title
Assessment of MODIS and VIIRS solar diffuser on-orbit degradation
Abstract
Both MODIS and VIIRS instruments use a solar diffuser (SD) for their reflective solar bands (RSB) on-orbit calibration. On-orbit changes in SD bi-directional reflectance factor (BRF) are tracked by a solar diffuser stability monitor (SDSM) using its alternate measurements of the sunlight reflected off the SD panel and direct sunlight through a fixed attenuation screen. The SDSM calibration data are collected by a number of filtered detectors, covering wavelengths from 0.41 to 0.94 mu m. In this paper we describe briefly the Terra and Aqua MODIS and S-NPP VIIRS SDSM on-orbit operation and calibration activities and strategies, provide an overall assessment of their SDSM on-orbit performance, including wavelength-dependent changes in the SDSM detector responses and changes in their SD BRF, and discuss remaining challenging issues and their potential impact on RSB calibration quality. Due to different launch dates, operating configurations, and calibration frequencies, the Terra and Aqua MODIS and S-NPP VIIRS SD have experienced different amount of SD degradation. However, in general the shorter the wavelength, the larger is the SD on-orbit degradation. On the other hand, the larger changes in SDSM detector responses are observed at longer wavelengths in the near infrared (NIR).
Year
DOI
Venue
2015
10.1117/12.2185817
Proceedings of SPIE
Keywords
Field
DocType
MODIS,VIIRS,Calibration,Solar Diffuser,Degradation,Solar Diffuser Stability Monitor
Meteorology,Sunlight,Near-infrared spectroscopy,Remote sensing,Optics,Orbital mechanics,Attenuation,Spectral bands,Detector,Calibration,Wavelength,Physics
Conference
Volume
ISSN
Citations 
9607
0277-786X
2
PageRank 
References 
Authors
0.40
0
6
Name
Order
Citations
PageRank
Xiaoxiong Xiong1427123.62
Jon Fulbright2174.83
Amit Angal37227.54
Zhipeng Wang45217.96
Xu Geng586.77
James J. Butler63414.58