GPS用于海上定位的模拟试验
A Simulated Analysis of the Application of GPS in Oceanographic Surveying
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摘要: 文中给出了在海洋测量中用全球定位系统(GPS)伪距以及伪距和载波相位相结合进行定位的数学模型,并用这些模型分析了TL-4100接收机在地面点上70分钟的单点实测资料。分析指出,考虑高程先验信息时,消除了目前P-码三维单点定位特有的零定位现象,并使定位的平面精度优于±5米。P-码伪距和载波相位相结合的单点定位,可以达到优于±0.5米的重复精度。Abstract: Mathematical models for GPS positionivg on sea——surface using pseudorange and/orcarrier phase observations are given. A simulated study is done by analysing a set ofdata obtained with the TI——4100 receiver on a fixed point. It is shown that the GDOPspike is climinated and the PPS's accuracy reaches±5m when additional height infor-mation is corsidered. The accuracy of the point positioning using both the carrier phaseand P——code observations can attain to ±0.5m (repeatability).