Assessment of MODIS and VIIRS solar diffuser on-orbit degradation

Xiaoxiong Xiong; Jon Fulbright; Amit Angal; Zhipeng Wang; Xu Geng; Jim Butler

doi:10.1117/12.2185817

11 September 2015 Assessment of MODIS and VIIRS solar diffuser on-orbit degradation

Xiaoxiong Xiong, Jon Fulbright, Amit Angal, Zhipeng Wang, Xu Geng, Jim Butler

Proceedings Volume 9607, Earth Observing Systems XX; 96071T (2015) https://doi.org/10.1117/12.2185817
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

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 0.94μm. 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).

Citation Download Citation

Xiaoxiong Xiong, Jon Fulbright, Amit Angal, Zhipeng Wang, Xu Geng, and Jim Butler "Assessment of MODIS and VIIRS solar diffuser on-orbit degradation", Proc. SPIE 9607, Earth Observing Systems XX, 96071T (11 September 2015); https://doi.org/10.1117/12.2185817

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available