亚分米级GPS基线解算新算法

当双差模糊度固定解的可靠性下降时,三差基线解成为当前情况下的最优选择,但通常情况下三差基线解精度只能达到分米级,难以满足高精度的要求.通过对三差测量值进行误差分析,给出三差观测量信噪比模型,结合实际观测数据分析,指出噪声对三差观测量影响很大.借鉴均值漂移理论出了精度为亚分米级的基线解算的新算法,给出了适用于单频三差基线解算的均值漂移模型,所述算法的精度可以达到10cm,即亚分米级.

An algorithm for GPS baseline processing in precision of sub-decimeter

Because global positioning system (GPS) ambiguity-fixed solutions can be impossible or unreliable, triple-difference solutions have been preferred over relatively weak double-difference solutions. However, the precision of triple-difference solutions is above 10 cm, failing to satisfy the precision requirements of many applications. This paper examines the error model through error analysis of triple-difference observations. It was found that thermal noise affects the solution more than other error sources. Drawing lessons from mean shift theory, the authors proposed the first sub-decimeter algorithm: a mean shift model that can be applied to triple-difference solutions. The precision of the algorithm is better than 10cm.