METHOD FOR USING POSITION/ATTITUDE INFORMATION TO ENHANCE A VEHICLE GUIDANCE SYSTEM

An enhanced vehicle guidance system (10) comprises a global navigation satellite system (GNSS) receiver (14) and a data processor with a memory component (20) and a computing device (16). The method for enhancing a vehicle's guidance system comprises obtaining attitude, latitude, and longitude data for each of a plurality of positions (38) of the GNSS receiver. The attitude is used to calculate an inertial correction factor to compensate for GNSS position inaccuracies induced as a result of the vehicle rolling and pitching on uneven terrain. The latitude, longitude, and attitude of the plurality of positions is stored in the memory component (20) such that the system may look-up the attitude for a given position without recalculating or measuring the attitude.