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Proceedings Paper

A payload-centric integration and test approach on the Wide-field Infrared Survey Explorer Mission
Author(s): Fengchuan Liu; Mohamed Abid; Valerie Duval; Peter Eisenhardt; John Elwell; Ingolf Heinrichsen; William R. Irace; Jason LaPointe; Mark Larsen; Mark Shannon; Nicholas Taylor; Edward Wright
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Paper Abstract

NASA's Wide-field Infrared Survey Explorer (WISE) mission was successfully launched on December 14, 2009. All spacecraft subsystems and the single instrument consisting of four imaging bands from 3.4 to 22 microns, a 40 cm afocal telescope, reimaging optics, and a two-stage solid hydrogen cryostat have performed nominally on orbit, enabling the trouble-free survey of the entire infrared sky. Among the many factors that contributed to the WISE post-launch success is the thorough pre-launch system integration and test (I&T) approach tailored to the cryogenic payload. The simple and straightforward interfaces between the spacecraft and the payload allowed the payload to be fully tested prior to integration with the spacecraft. A payload high-fidelity thermal, mass and dynamic simulator allowed the spacecraft I&T to proceed independently through the system-level thermal vacuum test and random vibration test. A payload electrical simulator, a high-rate data processor and a science data ingest processor enabled very early end-to-end data flow and radio-frequency testing using engineering model payload electronics and spacecraft avionics, which allowed engineers to identify and fix developmental issues prior to building flight electronics. This paper describes in detail the WISE I&T approach, its benefits, challenges encountered and lessons learned.

Paper Details

Date Published: 7 September 2010
PDF: 13 pages
Proc. SPIE 7796, An Optical Believe It or Not: Key Lessons Learned II, 779608 (7 September 2010); doi: 10.1117/12.864354
Show Author Affiliations
Fengchuan Liu, Jet Propulsion Lab. (United States)
Mohamed Abid, Jet Propulsion Lab. (United States)
Valerie Duval, Jet Propulsion Lab. (United States)
Peter Eisenhardt, Jet Propulsion Lab. (United States)
John Elwell, Space Dynamics Lab. (United States)
Ingolf Heinrichsen, Jet Propulsion Lab. (United States)
William R. Irace, Jet Propulsion Lab. (United States)
Jason LaPointe, Jet Propulsion Lab. (United States)
Mark Larsen, Space Dynamics Lab. (United States)
Mark Shannon, Ball Aerospace & Technologies Corp. (United States)
Nicholas Taylor, Ball Aerospace & Technologies Corp. (United States)
Edward Wright, Univ. of California, Los Angeles (United States)

Published in SPIE Proceedings Vol. 7796:
An Optical Believe It or Not: Key Lessons Learned II
Mark A. Kahan, Editor(s)

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