An aircraft weather radar system can be used with a terrain avoidance system. The aircraft weather radar system is coupled to an antenna. A processor receives radar returns received by the antenna. The processor determines terrain elevation estimates for use with the terrain avoidance system from the...http://www.google.com.au/patents/US7859449?utm_source=gb-gplus-sharePatent US7859449 - System and method for a terrain database and/or position validation
