Low elevation guidance system

Details Low elevation guidance system Low elevation guidance system

1987-04-22

1988-12-06

Blum, Theodore M.

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

Directive

Beacon or receiver

342390, 342407, G01S 116

Patent

active

047898640

ABSTRACT:
A guidance system for aircraft wherein a radio antenna on the ground transmits a beam that sweeps across an aircraft and the aircraft receives the beam and utilizes its amplitude waveform in determining the location of the aircraft from the station. At low elevation angles of the aircraft the portion of received waveform that includes significant amounts of signal reflected from the ground is used in only a preliminary manner. The more reliable, directly radiated, portions of the waveform are utilized to compute by least squares error, the median of a Gaussian beam shape. That median serves as an estimate of the time that the transmitting antenna was pointing directly at the aircraft.

REFERENCES:
patent: 3900877 (1975-08-01), Kohler
patent: 3921076 (1975-11-01), Currie
patent: 4193075 (1980-03-01), Blazek et al.
patent: 4224623 (1980-09-01), Mercer et al.

Affiliated with

Also associated with

Rating

Low elevation guidance system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low elevation guidance system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low elevation guidance system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1495772