Automatic direction finding equipment for airplanes
First Claim
1. A system for automatically obtaining the line of position of an airplane relative to ground station wherein said airplane carries radio telephone equipment on board and said ground station having a direction finder on the ground operating automatically when a signal is received from said airplane within the frequency range of said radio telephone equipment comprising, a recording device connected to said direction finder for automatically storing the line of position of said airplane, a ground transmitter operating at the frequency of said radio telephone device connected to said recording device, and at least a part of the stored message content including said line of position of said airplane automatically transmitted from said ground transmitter to said airplane and detected by said radio telephone equipment on said airplane.
0 Assignments
0 Petitions
Accused Products
Abstract
An automatic direction finding system for an airplane which utilizes ground equipment for automatically determining the line of position of aircraft transmitting radiant energy and which calculates the aircraft'"'"'s line of position and transmits such line of position to the aircraft over an available audio channel. The ground station may be unmanned and provides for storage means for converting the aircraft'"'"'s bearing from the station into an audible message which can be automatically transmitted to the aircraft.
19 Citations
7 Claims
- 1. A system for automatically obtaining the line of position of an airplane relative to ground station wherein said airplane carries radio telephone equipment on board and said ground station having a direction finder on the ground operating automatically when a signal is received from said airplane within the frequency range of said radio telephone equipment comprising, a recording device connected to said direction finder for automatically storing the line of position of said airplane, a ground transmitter operating at the frequency of said radio telephone device connected to said recording device, and at least a part of the stored message content including said line of position of said airplane automatically transmitted from said ground transmitter to said airplane and detected by said radio telephone equipment on said airplane.
Specification