Radar speed measurement from range determined by focus

Details Radar speed measurement from range determined by focus Radar speed measurement from range determined by focus

1971-08-30

1979-10-02

Bentley, Stephen C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 9R, G01S 946

Patent

active

041700066

ABSTRACT:
In a forward-looking coherent pulse doppler synthetic aperture radar, focus adjusted only as a function of speed is applied in an identical fashion to each range channel, whereby data representative of a radar reflectivity map, stored as a matrix of range and doppler frequency, provides maximum contrast only for ranges corresponding to the focus applied to each range channel. Determination of maximum contrast determines the range to which the focus is related, which range may be utilized in a speed computation. In one embodiment, the range for which maximum contrast is calculated is utilized as the range for speed computation; in another embodiment, known curve fitting techniques are utilized so as to determine a maximum in a curve of contrast versus range.

REFERENCES:
patent: 3178711 (1965-04-01), Case
patent: 3333267 (1967-07-01), Williams
patent: 3603992 (1971-09-01), Goggins

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