Accession Number : ADD008819

Title :   Compass.

Descriptive Note : Patent Application,


Personal Author(s) : Bennett,John G

Report Date : 04 Aug 1981

Pagination or Media Count : 23

Abstract : This invention relates to a non-magnetic compass for use in a moving military land vehicle, comprising a rapidly rotating platform having a north star-seeking columnar element that carries a sun-seeking telescope. Fibre optic bundles transmit sun rays from the telescope to a selected light sensor in a stationary circular sensor system concentric with the platform rotational axis. During one instant during each rotating cycle of the platform the telescope will sight the sun while the columnar element is simultaneously oriented to the north star; light rays are transmitted from the scope to a north-oriented sensor in the sensor system. The columnar element and telescope are periodically adjusted to take into account the geographical location of the vehicle and time of year.

Descriptors :   *Patent applications, *Compasses, Star trackers, Photodetectors, Alignment, Optical circuits, Fiber optics, Position(Location), Mobile

Subject Categories : Space Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE