Electronic direction finder

Details Electronic direction finder Electronic direction finder

1991-10-04

1992-09-08

Blum, Theodore M.

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

Directive

Beacon or receiver

342357, 342439, G01S 502

Patent

active

051462311

ABSTRACT:
An electronic direction finder (10), having a housing (11) with a major axis (18), has a GPS receiver (28) and directional (31) and omnidirectional (30) antennas and provides an electrical signal (angle A) indicative of the direction of the housing axis (18) with respect to a predetermined compass heading (North). The electrical signal (angle A) is provided by using determined positions of the GPS receiver (28) and one GPS satellite to calculate a compass bearing from the receiver (28) to the one satellite and using the directional antenna (31) to determine the orientation of the housing axis (18) with respect to the satellite. This eliminates using electrical output terrestrial magnetism sensing devices to sense direction finder/receiver orientation with respect to compass direction, and therefore avoids the inaccuracies and costs associated with such magnetism sensing devices.

REFERENCES:
patent: 4410890 (1983-10-01), Davis et al.
patent: 4754280 (1988-06-01), Brown et al.
patent: 4881080 (1989-11-01), Jablonski
patent: 4949268 (1990-08-01), Nishikawa et al.
U.S. application filed Jun. 3, 1991, Ser. No. 07/710,197, Lauro et al., Title "Electronic Direction Finder".

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