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 precision 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 Geostationary 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.