Apparatus for and a method of determining compass headings

Details Apparatus for and a method of determining compass headings Apparatus for and a method of determining compass headings

1985-06-24

1989-11-14

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

342451, G01S 502, H04B 7185

Patent

active

048810800

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.

REFERENCES:
patent: 3171126 (1965-02-01), Wiley
patent: 3191176 (1965-06-01), Guier
patent: 3643259 (1972-02-01), Entner
patent: 4589100 (1986-05-01), Savit

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