Computer Program for the NRL Satellite Position Display

摘要

A computer driven satellite display has recently been developed and evaluated at the Naval Research Laboratory. This equipment, designated as the NRL Satellite position Prediction And Display (SPAD), provides a considerable amount of display control versatility. Up to eleven satellites can be selected either individually or by category from a repertoire of 88 satellites. These selected satellites are then updated and displayed in either real time or at an accelerated time. Several display modes are available at an operator's command, namely, world map, rectangular expanded mode, and polar expanded mode. A commercial equivalent of the AN/UYK-1 computer was used in the research version of SPAD. Since the program was written in a language peculiar to this machine, the program listings and codings are omitted from the present report. However, included in this report are the complete set of computer program flow diagrams and a brief description of the interrupt service routines along with their corresponding subroutines. Characteristics of the AN/UYK-1 computer, operator control panel provisions and possible future program modifications are discussed. The contents of this report should be a sufficient indication of the program philosophy. This philosophy, with appropriate minor changes, could be implemented by any suitable language. (Author)