Apparatus for and a method of determining compass headings
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United States of America Patent
Stats
-
Nov 14, 1989
Grant Date -
N/A
app pub date -
Jun 24, 1985
filing date -
Jun 24, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A compass system and method incorporating a global positioning system (GP such as the NAVSTAR/GPS multi-satellite system, is configured to acquire accurate compass heading information without being affected by magnetic anomalies and without being dependent on the elapsed time since a previous position fix. The compass system comprises, inter alia, two antenna/preamplifiers located, for example, fore and aft a ship or aircraft separated by a predetermined distance d. A microprocessor/minicomputer portion of the system causes an electronic coaxial switch to switch a GPS receiver between the two antenna/preamplifiers automatically thereby measuring their absolute positions. The microprocessor/minicomputer computes and displays on a display unit a compass heading based on the knowledge of the absolute positions of the antenna/preamplifiers and the distance d therebetween.
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