RANGE GATE PULLOFF
Radar Glossary
Radar — Range Gate Pulloff
Information on Range Gate Pulloff
Targets being tracked using range gates can attempt to employ a tactic known as range-gate pull off (RGPO) or range-gate stealing. The target uses a jammer to transmit the appropriate electromagnetic energy back to the tracking radar at the appropriate time and power level. Over the subsequent few pulses, the jammer progressively increases its transmitted power. This increased power is welcomed by the receiver circuitry and the receiver gain levels are progressively wound down to accommodate the increased received power. The receiver is, therefore, becoming increasingly de-sensitised to the real received energy. Once this process has continued for a short period of time, the receiver has become too insensitive to receive the real signal levels from the target alone. At this point, the target is said to have stolen or captured the range gates. Once the range gates have been stolen, the target can either switch the jamming off and force the radar to reacquire (taking valuable time) or the jammer can commence transmitting false returns at ever increasing (or decreasing) time intervals to the tracking radar in an attempt to "walk" the tracker away from the target. Either way, the target has successfully performed deception jamming of the tracking radar.
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