Development of Navigation Algorithm to Improve Position Accuracy by Using Multi-DGPS Reference Stations’ PRC Information

Abstract

In this paper, the linearly interpolated PRC (Pseudorange Correction) regenerating algorithm was applied to improve the DGPS positioning accuracy at user's position by using the various PRC information obtained from multi-DGPS reference stations. The unknown user's position can be calculated from the regenerated PRC which can be expressed as the linear combination of multi-DGPS reference station's known position and PRC values of common satellite from multi- DGPS reference stations. Two sets of 3 DGPS reference stations were selected to compare the performance of the linearly interpolated PRC regenerating algorithm. To test the performance, linearly interpolated PRC regenerating algorithm adopted multi-channel DGPS receiver was developed. The results show that the DGPS positioning accuracy is improved by about 40% and with the modification of the navigation solution software of GBAS receiver, GBAS positioning accuracy improvement is expected without any modification of GBAS reference station's equipment.