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New Software for Ensemble Creation in the Spitzer-Space-Telescope Operations DatabaseSome of the computer pipelines used to process digital astronomical images from NASA's Spitzer Space Telescope require multiple input images, in order to generate high-level science and calibration products. The images are grouped into ensembles according to well documented ensemble-creation rules by making explicit associations in the operations Informix database at the Spitzer Science Center (SSC). The advantage of this approach is that a simple database query can retrieve the required ensemble of pipeline input images. New and improved software for ensemble creation has been developed. The new software is much faster than the existing software because it uses pre-compiled database stored-procedures written in Informix SPL (SQL programming language). The new software is also more flexible because the ensemble creation rules are now stored in and read from newly defined database tables. This table-driven approach was implemented so that ensemble rules can be inserted, updated, or deleted without modifying software.
Document ID
20070031775
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Laher, Russ
(California Inst. of Tech. Pasadena, CA, United States)
Rector, John
(California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 23, 2013
Publication Date
October 24, 2004
Subject Category
Computer Programming And Software
Meeting Information
Meeting: Astronomical Data Analysis Software and Systems XIV
Location: Pasadena, CA
Country: United States
Start Date: October 24, 2004
End Date: October 27, 2004
Sponsors: California Inst. of Tech.
Distribution Limits
Public
Copyright
Other
Keywords
Spitzer Science Center (SSC)
space telescope
multiple input images
Spitzer

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