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- W2103115776 abstract "SUMMARY GPS technique has successfully become a powerful positioning and navigation tool in the recent years. However, there are still some drawbacks to the operations of GPS, such as the view of sky obstructed, causing the positioning precision degraded in some ways. The pseudolite, a satellite-like GPS ground signal generator, is then expected to provide the extrameasurements and to improve the GPS precision, coverage, and availability at the obstructed areas. It has been practically proved by this paper that the use of GPS pseudolite can effectively improve the repeatability of GPS vertical component from 2 cm to 1 cm. It is also encouraged that such level of GPS precision improvement can even be achieved at a trial area where is free of any obstruction to the GPS observation environment. There is really a room to upgrade the GPS effectiveness, especially for cadastral surveys in the urban canyons or monitoring surveys nearby the structural bodies, if the GPS pseudolites are assisted. This research has proved that the GPS pseudolite combination can promote accurate positioning results, especially when there are no obstacles in the trial area; good repeatability was also obtained in the vertical component. This shows that GPS pseudolite can improve results in areas lacking a good view of the sky, such as in the downtown areas of cities or in valleys. In this study the vertical component precision increased by almost 50%; the improvement in the horizontal component was not significant" @default.
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- W2103115776 date "2004-01-01" @default.
- W2103115776 modified "2023-09-27" @default.
- W2103115776 title "Preliminary Testing of Pseudolite to Improve GPS Precision" @default.
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