基于非组合精密单点定位的GPS三频数据仿真

摘要

提出利用非组合PPP算法实施三频GPS数据仿真,通过GPS双频观测数据解算测站环境误差(如对流层、电离层延迟等),然后利用解算误差项进行L5频率数据仿真,经与实测数据对比,载波相位观测值差值大都在0.2周以内,且波动幅度较小,稳定可靠,该算法仿真的三频GPS数据能较好地体现测量实际环境,有利于三频数据相关算法研究.%The simulation technique of triple-frequency GPS data by using uncombined precise point positioning (PPP) algorithm is proposed. Through solving GPS dual-frequency observation data, the errors of observational environment including troposphere and ionosphere delay are calculated, and then the data of L5 frequency are simulated-according to the errors calculated. By the comparison with the measured L5 observation data.it is obtained that the difference between the simulated carrier and the observed carrier is less than 0. 2 cycles, and the fluctuation is small enough that verifies the algorithm. Consequently, the simulation technique using PPP could reflect the actual measuring environment and play a significant role in the relevant triple-frequency algorithm.