Patent ID: 9720077
Date: 2017-08-01
CPC Classifications: G01S,Y02A

Claim:
1. A method, comprising: accessing a radio altimeter data structure for predetermined antenna gain data, the predetermined antenna gain data being associated with one or more antennas including a receiver antenna implemented in a radio altimeter system of an aircraft, the predetermined antenna gain data including data of expected gains for reflected signals relative to possible angles for the reflected signals, the predetermined antenna gain further including an expected gain for a reflected signal at an antenna bore site angle, expected gains at angles corresponding to a main lobe of a radiation pattern of the receiver antenna, and expected gains at angles corresponding to side lobes of the radiation pattern of the receiver antenna; receiving aircraft maneuver data from a reference system; adjusting a gain from the receiver antenna based at least on the aircraft maneuver data and the predetermined antenna gain data, wherein adjusting the gain from the receiver antenna based at least on the aircraft maneuver data and the predetermined antenna gain data further comprises: determining a radio altimeter height based at least on the adjusted gain.