Accession Number : ADD014436

Title :   Apparatus for and a Method of Determining Compass Headings.

Descriptive Note : Patent, Filed 24 Jun 85, Patented 14 Nov 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Jablonski, Daniel G

Report Date : 14 Nov 1989

Pagination or Media Count : 5

Abstract : A compass system and method incorporating a global positioning system (GPS), such as the NAV-STAR/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 computers 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 there between. Patents. (SDW)

Descriptors :   *COMPASSES, *PATENTS, AIRCRAFT, ANTENNAS, COAXIAL CONFIGURATIONS, COMPUTERS, DISPLAY SYSTEMS, ELECTRONIC SWITCHES, GLOBAL POSITIONING SYSTEM, MAGNETIC ANOMALIES, MICROPROCESSORS, NAVIGATION SATELLITES, MINICOMPUTERS, POSITION FINDING, PREAMPLIFIERS, RANGE(DISTANCE)

Subject Categories : Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE