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Proceedings Paper

VIIRS on-orbit optical anomaly: investigation, analysis, root cause determination and lessons learned
Author(s): Glenn Iona; James Butler; Bruce Guenther; Larissa Graziani; Eric Johnson; Brian Kennedy; Craig Kent; Robert Lambeck; Eugene Waluschka; Xiaoxiong Xiong
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Paper Abstract

A gradual, but persistent, decrease in the optical throughput was detected during the early commissioning phase for the Suomi National Polar-Orbiting Partnership (SNPP) Visible Infrared Imager Radiometer Suite (VIIRS) Near Infrared (NIR) bands. Its initial rate and unknown cause were coincidently coupled with a decrease in sensitivity in the same spectral wavelength of the Solar Diffuser Stability Monitor (SDSM) raising concerns about contamination or the possibility of a system-level satellite problem. An anomaly team was formed to investigate and provide recommendations before commissioning could resume. With few hard facts in hand, there was much speculation about possible causes and consequences of the degradation. Two different causes were determined as will be explained in this paper. This paper will describe the build and test history of VIIRS, why there were no indicators, even with hindsight, of an on-orbit problem, the appearance of the on-orbit anomaly, the initial work attempting to understand and determine the cause, the discovery of the root cause and what Test-As-You-Fly (TAYF) activities, can be done in the future to greatly reduce the likelihood of similar optical anomalies. These TAYF activities are captured in the “lessons learned” section of this paper.

Paper Details

Date Published: 15 October 2012
PDF: 15 pages
Proc. SPIE 8510, Earth Observing Systems XVII, 85101C (15 October 2012); doi: 10.1117/12.933863
Show Author Affiliations
Glenn Iona, NASA Goddard Space Flight Ctr. (United States)
James Butler, NASA Goddard Space Flight Ctr. (United States)
Bruce Guenther, Stellar Solutions, Inc. (United States)
Larissa Graziani, SGT, Inc. (United States)
Eric Johnson, Raytheon Space & Airborne Systems (United States)
Brian Kennedy, Kennedy Consulting, Inc. (United States)
Craig Kent, Stellar Solutions, Inc. (United States)
Robert Lambeck, MEI Technologies, Inc. (United States)
Eugene Waluschka, NASA Goddard Space Flight Ctr. (United States)
Xiaoxiong Xiong, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 8510:
Earth Observing Systems XVII
James J. Butler; Xiaoxiong Xiong; Xingfa Gu, Editor(s)

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