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Proceedings Paper

Spitzer warm mission transition and operations
Author(s): William A. Mahoney; Lisa J. Garcia; Joseph Hunt; Douglas B. McElroy; Vince G. Mannings; David S. Mittman; JoAnn C. O'Linger; Marc Sarrel; Elena Scire
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Paper Abstract

Following the successful dynamic planning and implementation of IRAC Warm Instrument Characterization activities, transition to Spitzer Warm Mission operations has gone smoothly. Operation teams procedures and processes required minimal adaptation and the overall composition of the Mission Operation System retained the same functionality it had during the Cryogenic Mission. While the warm mission scheduling has been simplified because all observations are now being made with a single instrument, several other differences have increased the complexity. The bulk of the observations executed to date have been from ten large Exploration Science programs that, combined, have more complex constraints, more observing requests, and more exo-planet observations with durations of up to 145 hours. Communication with the observatory is also becoming more challenging as the Spitzer DSN antenna allocations have been reduced from two tracking passes per day to a single pass impacting both uplink and downlink activities. While IRAC is now operating with only two channels, the data collection rate is roughly 60% of the four-channel rate leaving a somewhat higher average volume collected between the less frequent passes. Also, the maximum downlink data rate is decreasing as the distance to Spitzer increases requiring longer passes. Nevertheless, with well over 90% of the time spent on science observations, efficiency has equaled or exceeded that achieved during the cryogenic mission.

Paper Details

Date Published: 30 July 2010
PDF: 12 pages
Proc. SPIE 7737, Observatory Operations: Strategies, Processes, and Systems III, 77371W (30 July 2010); doi: 10.1117/12.857814
Show Author Affiliations
William A. Mahoney, Spitzer Science Ctr., California Institute of Technology (United States)
Lisa J. Garcia, Spitzer Science Ctr., California Institute of Technology (United States)
Joseph Hunt, Jet Propulsion Lab. (United States)
Douglas B. McElroy, Spitzer Science Ctr., California Institute of Technology (United States)
Vince G. Mannings, Spitzer Science Ctr., California Institute of Technology (United States)
David S. Mittman, Jet Propulsion Lab. (United States)
JoAnn C. O'Linger, Spitzer Science Ctr., California Institute of Technology (United States)
Marc Sarrel, Jet Propulsion Lab. (United States)
Elena Scire, Spitzer Science Ctr., California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 7737:
Observatory Operations: Strategies, Processes, and Systems III
David R. Silva; Alison B. Peck; B. Thomas Soifer, Editor(s)

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