整周模糊度与电离层延迟是GPS观测方程中两类不同性质的未知参数。基于参数分类解算的思想,结合平方根信息滤波/平滑的基本原理,推导出使用单颗GPS卫星的双频观测数据单历元求解电离层延迟与整周模糊度的公式。通过使用模拟数据实验获得的结果来看,该方法有效,整周模糊度和电离层延迟解算精度可达0.3周和0.02m。
Ionosphere delay and ambiguity are the two idiosyncratic parameters in GPS observation equations. Based on the parameter classification,the equation to estimate the ionosphere delay and ambiguity was concluded by using the single-epoch observation data from the single GPS satellite with the square root information filter/smoother (SRIF/S). The results from the simulation data show that the method is effective and the ambiguity and Ionosphere delay can be successfully estimated with an accuracy of 0.3 cycles and 0.02 m respectively.