Strapdown Latitude and Longitude Finder

The Strap down Latitude and Longitude Finder is an inertial system for latitude and longitude analytical determination. The computing algorithm of latitude and longitude determination of a moving vehicle is considered in this paper. The block diagram of the algorithm is presented. The algorithm is based on Strapdown Inertial Technology. The Inertial Measurement Unit is required for developing of the Strapdown Latitude and Longitude Finder. Inertial Measurement Unit consist of three gyroscopes - precision angular rate sensors and accelerometers. The gyroscopes are key components for computing algorithm. The accelerometers may be required for alignment stage and for computing of direction cosine matrix. An influence of gyroscopes errors on the latitude and longitude determination is estimated. Mainly the latitude determination is sensitive to the gyroscopes errors.