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Automation of the Mark 3 field systemThe software and hardware components which will enable hands off operation are described. The operation of the field system begins with the scheduling of observations. An interactive program, SKED, provides displays of mutual visibility, automatic calculation of telescope slewing times, and the ability to list and edit the schedule. The output of SKED is a schedule file containing commands in the Standard Notation for Astronomy Procedures (SNAP) language which the field system uses for controlling events during the experiment. The most important features of SNAP include sophisticated time sequencing of events, automatic logging of all commands and responses, and the ability to define often used sequences of commands as procedures. A control program, BOSS, running in an HP 1000 minicomputer, reads the SNAP commands from a schedule file and interprets them in terms of commands and requests to devices. Interactive command input is possible through the operator's display terminal. Communication with all of the Mark 3 electronics modules is done via a small general purpose interface board (a microprocessor based ASCII transceiver) which has been installed in each module. Additional devices are controlled and monitored using the IEEE 488 General Purpose Interface Bus.
Document ID
19800020323
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vandenbere, N. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Clark, T. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Foster, L. N. (Northeast Radio Observatory Corp. Westford, Mass. Haystack Observatory, United States)
Whitney, A. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Lampe, G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1980
Publication Information
Publication: Radio Interferometry
Subject Category
Earth Resources And Remote Sensing
Accession Number
80N28824
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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