K. J. Gamauf

Abstract: This report describes use of the revised computer program FOOTPRINTS. The program automatically computes and plots earth footprints and service area polygons on a map projection of the earth's surface. The program can be used as a design tool to maximize geostationary satellite antenna coverage over a particular portion of the earth's surface and to limit potential interference in adjacent areas. This program is a revised version of a program written several years ago at the Institute for Telecommunication Sciences. The program can accommodate a broad range of user-supplied input details ranging from minimal information to very specific antenna pattern data. The program is written in the FORTRAN IV computer language for use in an interactive (time-sharing) mode on a CDC 170/750 computer. This manual provides a general description of the FOOTPRINTS program, explains the execution of the program, including the input of the required information, and interprets the program output. Sample executions of the program also are provided.

Keywords: broadcasting-satellite service (BSS); footprints; geostationary satellite; computer program; service area

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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