Doppler-radar, projected terrain-clearance system

Details Doppler-radar, projected terrain-clearance system Doppler-radar, projected terrain-clearance system

1976-05-24

1977-05-17

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 7TA, G01S 922

Patent

active

040245373

ABSTRACT:
A doppler-radar system for computing terrain clearance of the projected flight path of an aircraft from a maximum-range doppler frequency and a doppler frequency for a known slant range. The apparatus includes a transmitter/receiver, a maximum-range doppler-frequency counter, a slant-range doppler-frequency counter, and a terrain-clearance computer which receives the outputs of the maximum-range and slant-range doppler-frequency counters to compute a depression angle and terrain clearance and provide an output of the terrain clearance to an indicator.

REFERENCES:
patent: 3187328 (1965-06-01), Vetter
patent: 3553689 (1971-01-01), Bechtel

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