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Software requirements: Guidance and control software development specificationThe software requirements for an implementation of Guidance and Control Software (GCS) are specified. The purpose of the GCS is to provide guidance and engine control to a planetary landing vehicle during its terminal descent onto a planetary surface and to communicate sensory information about that vehicle and its descent to some receiving device. The specification was developed using the structured analysis for real time system specification methodology by Hatley and Pirbhai and was based on a simulation program used to study the probability of success of the 1976 Viking Lander missions to Mars. Three versions of GCS are being generated for use in software error studies.
Document ID
19900017211
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Withers, B. Edward (Research Triangle Inst. Research Triangle Park, NC, United States)
Rich, Don C. (Research Triangle Inst. Research Triangle Park, NC, United States)
Lowman, Douglas S. (Research Triangle Inst. Research Triangle Park, NC, United States)
Buckland, R. C. (Research Triangle Inst. Research Triangle Park, NC, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1990
Subject Category
Computer Programming And Software
Report/Patent Number
NASA-CR-182058
NAS 1.26:182058
Accession Number
90N26527
Funding Number(s)
CONTRACT_GRANT: NAS1-17964
PROJECT: RTOP 505-66-21-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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