Ground station for a round-trip-path distance-measuring system

Details Ground station for a round-trip-path distance-measuring system Ground station for a round-trip-path distance-measuring system

1977-10-28

1978-11-21

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 6DF, G01S 956

Patent

active

041268598

ABSTRACT:
This DME ground station permits the distance from the touchdown point (where no transponder can be installed) to be measured on the aircraft without any change in the airborne equipment. The time difference between the reception of an interrogating signal and the transmission of a reply signal is chosen so that the transmission of reply signals from the DME transponder located on one side of the runway corresponds to a transmission from the touchdown point with respect to the signal transit time.
On the ground, a DME transponder is located on one side of the runway on a level with the touchdown point, and a receiver and a direction finder are provided on the other side.

REFERENCES:
patent: 3564543 (1971-02-01), Nehama et al.

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