卫星位置偏差对双星/GIS组合定位的影响及组合定位试验

建立了双星定位和双星／GIS组合定位的计算模型.在此基础上研究了星历误差对双星定位结果的 影响,卫星位置偏差对组合定位结果的影响,在组合定位中,在经、纬度方向上,分别给卫星位置加入均方差 为1°的位置偏差.结果表明,给卫星位置加入均方差为1°的经、纬度方向位置偏差,并不会降低组合定位的 精度.对这一重要结论,从几何上给出了解释.最后进行了双星／GIS组合定位的物理试验.试验结果表明, 双星／GIS组合定位确实可以大大提高双星定位的精度.

Influence of Satellite Departure and Experiment Research on Integrated Positioning With Two Geostationary Satellites and GIS

A calculate model is presented in this paper, which is used to study both positioning with two Geostationary satellites and integrated positioning with two Geostationary satellites and geographic Information System (GIS). With the model, how the ephemeris error influence the preci-sion of positioning with two Geostationary satellites and how the position of the satellites influence the integrated positioning when they were added 1?departure in longitude and latitude are studied. The result shows it does not debase the accuracy of the integrated positioning with two Geostation-ary satellites and geographic information system, to add a small departure on the satellites position. Also, the conclusion is explained by geometry. At the end of the paper, an experiment was done which proved the integrated positioning with two Geostationary satellites and geographic information system can surely improve the precision of positioning with Geostationary satellites.