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Reporting Differences Between Spacecraft Sequence FilesA suite of computer programs, called seq diff suite, reports differences between the products of other computer programs involved in the generation of sequences of commands for spacecraft. These products consist of files of several types: replacement sequence of events (RSOE), DSN keyword file [DKF (wherein DSN signifies Deep Space Network)], spacecraft activities sequence file (SASF), spacecraft sequence file (SSF), and station allocation file (SAF). These products can include line numbers, request identifications, and other pieces of information that are not relevant when generating command sequence products, though these fields can result in the appearance of many changes to the files, particularly when using the UNIX diff command to inspect file differences. The outputs of prior software tools for reporting differences between such products include differences in these non-relevant pieces of information. In contrast, seq diff suite removes the fields containing the irrelevant pieces of information before processing to extract differences, so that only relevant differences are reported. Thus, seq diff suite is especially useful for reporting changes between successive versions of the various products and in particular flagging difference in fields relevant to the sequence command generation and review process.
Document ID
20100009682
Document Type
Other - NASA Tech Brief
Authors
Khanampompan, Teerapat (California Inst. of Tech. Pasadena, CA, United States)
Gladden, Roy E. (California Inst. of Tech. Pasadena, CA, United States)
Fisher, Forest W. (California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 25, 2013
Publication Date
March 1, 2010
Publication Information
Publication: NASA Tech Briefs, March 2010
Subject Category
Man/System Technology and Life Support
Report/Patent Number
NPO-45438
Distribution Limits
Public
Copyright
Public Use Permitted.

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Related Records

IDRelationTitle20100009649Analytic PrimaryNASA Tech Briefs, March 2010