LAND MASS BLANKING APPARATUS (U)

Assignee

Filed

Jun 20, 1975

Granted

Feb 28, 1989

Location

Abstract

Conventionally, a shift register receives radar video return signals and es them into a signal processing and detecting means. Since continuous, large cross-section echoes such as those derived from land masses may saturate the processor, the present apparatus is set to blank such land masses. For this purpose, the shift register capacity is made coextensive with the continuous land mass echo and further, the register is provided with a series of taps spaced one from the other a distance representing selected increments of the range extent being tested. Each tap output is applied to an amplitude-thresholder to pass only higher strength echoes to a counter. Count-responsive means operating as a counter threshold control the radar signal processor to the extent that when the total count exceeds a certain number a processor "shut-off" signal is generated. When the count goes below the certain number a "turn-on" signal is generated. Thus, the processor is inactive when the count receives a predetermined total indicator of the large land mass to be blanked.

Source: Google Patents