International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California / This paper takes one through the processes followed by a designer when responding to a
specification for an earth terminal. The orbital parameters of Low-Earth Orbiting and
Medium-Earth Orbiting (LEO and MEO) satellites that affect autotracking and pointing of
an antenna are presented. The do’s and don’ts of specifying (or over specifying) the
antenna feed and pedestal size are discussed. The axis velocity and acceleration rates
required of a Y over X and El over AZ type pedestal are developed as a function of
satellite altitude, radio frequency of operation, and ground antenna terminal diameter.
Decision criteria are presented leading to requiring a tilt mechanism or a third axis to cover
direct and near overhead passes using an El over Az pedestal. Finally, the expressions
transforming Y over X configuration position angles to azimuth and elevation axis position
angles are presented.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/607593 |
| Date | 10 1900 |
| Creators | Turner, W. C. |
| Contributors | Electro-Magnetic Processes, Inc. |
| Publisher | International Foundation for Telemetering |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Proceedings |
| Rights | Copyright © International Foundation for Telemetering |
| Relation | http://www.telemetry.org/ |
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