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Single Point Positioning Using GPS, GLONASS and BeiDou Satellites

机译：使用GPS，GLONASS和北斗卫星进行单点定位

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This paper introduces the Chinese BeiDou satellite system and its comparison with the actual completed American GPS and the Russian GLONASS systems. The actual BeiDou system consists of 14 satellites covering totally the Asia-Pacific area. A Single Point Positioning (SPP) test has been realised in Changsha, Hunan province, China, to show the advantage of using combined pseudorange solutions from these 3 satellite navigation systems especially in obstructed sites. The test shows that, with an elevation mask angle of 10°, the accuracy is improved by about 20% in horizontal coordinates and nearly 50% in the vertical component using the simultaneous observations of the 3 systems compared to the GPS/GLONASS solution. For the processing with an elevation mask angle of 30°, most of the time less than 4 GPS satellites were available for the GPS-only case and no solution was possible. However, in this difficult situation, the combined GPS/GLONASS/ BeiDou solutions provided an accuracy (rms values) of about 5 m.
机译：本文介绍了中国北斗卫星系统及其与实际完成的美国GPS和俄罗斯GLONASS系统的比较。实际的北斗系统由14个卫星组成，覆盖整个亚太地区。单点定位（SPP）测试已在中国湖南省长沙市实现，以显示使用这3个卫星导航系统的组合伪距解决方案的优势，尤其是在受阻地点。测试表明，与GPS / GLONASS解决方案相比，使用这3个系统的同时观测，在仰角掩膜角度为10°的情况下，水平坐标的精度提高了约20％，垂直分量的精度提高了近50％。 。对于仰角掩膜角度为30°的处理，仅GPS情况下，大多数情况下少于4颗GPS卫星可用，并且无法解决。但是，在这种困难的情况下，组合的GPS / GLONASS /北斗解决方案可提供约5 m的精度（均方根值）。

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