Implementation of GPS High-Precision Positioning Post-Processing Technique

Double-difference carrier-phase relative positioning can realize GPS high-precision positioning. In the designing and implementation of post-processing technique, the key is resolving integer ambiguities. Applying with VC++ combining with MATCOM, the transformation from two dimension array to matrix has been realized, and matrix calculation is implemented in MATCOM, in which the LAMBDA algorithm has been realized. The influence brought in by the time of resolving integer ambiguities has been emphatically analyzed. By studying on practical examples, it is known that if integer ambiguities are fixed correctly, the positioning accuracy of double-difference carrier-phase relative positioning can attain centimeter-level.