Patent ID: 7576683
Filing Date: 2009-08-18
Classification: G01S

Abstract:
1. A method of radar altimeter operation including a time dependent gain control, said method comprising: triggering a Sensitivity Time Control (STC) gain control signal at a pulse repetition frequency (PRF) of a transmit pulse to attenuate interference from at least one of an antenna leakage signal and a signal reflected from equipment; shaping the STC gain control signal for a pulse width of the transmit pulse from no attenuation at a first time, before a transmitter sends the transmit pulse, to a stable maximum attenuation at the time the transmitter sends the transmit pulse, to no attenuation at a second time, after the transmitter sends the transmit pulse; and in response to a change in altitude, matching a bandwidth of an intermediate frequency (IF) amplifier to the pulse width of a transmitted pulse.