Patent ID: 8098192
Filing Date: 2012-01-17
Classification: G01S,Y02A

Abstract:
1. A terrain awareness system, comprising: a memory; and electronics for receiving radar returns and providing terrain alerts or warnings in response to the radar returns, wherein the electronics receive weather information from a weather database and terrain information from a terrain database in the memory, wherein the weather information in the database being associated with an area and wherein the electronics are configured to select a radar transmit function and/or a radar reception function for the area to adjust performance of the system based on the received radar returns, the terrain information, and the weather information for the area, wherein the weather information indicates an actual weather condition at the area, wherein the electronics provide a filtering function based upon the terrain information, the terrain information comprises an indication of at least a relative flat or mountainous area and wherein the electronics are configured to provide the filtering function in a frequency domain with Doppler mean frequencies being selected for matching an estimated ground return velocity.