Patent ID: 8359139

Claim:
A vehicle comprising: first and second non-aligned ground speed sensors mounted on the vehicle, each ground speed sensor angled downwardly for receiving a speed signal from the ground and generating an output signal correlated to a speed projection of the sensor; and an electronic control unit electrically connected to the two ground speed sensors and a GPS antenna through a receiver; wherein the electronic control unit computes using an algorithm an orientation angle between a heading of the vehicle indicating vehicle orientation and a direction of travel of the vehicle as a function of the first and second speed projections detected respectively by the first and second non-aligned ground speed sensors and known mounting angles of both of the sensors; and the electronic control unit utilizes the location of the GPS antenna determined with the GPS system, the direction of travel of the vehicle and the angle between the vehicle orientation and the vehicle direction of travel to determine at least one of the orientation of the vehicle or position of an attached implement.