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介绍Locata伪距和载波相位单点定位的方法。通过仿真数据和试验,分析基准站个数对定位精度的影响,比较伪距定位和观测值组合定位的精度,验证了载波相位定位结果的稳定性。分析表明,Locata静态单点定位的精度可以达到cm~mm级。 相似文献
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J. -P. Montillet G. W. Roberts C. Hancock X. Meng O. Ogundipe J. Barnes 《Journal of Geodesy》2009,83(2):91-103
Locata is a new positioning technology developed by the Locata Corporation. At the beginning of 2007, the Institute of Engineering
Surveying and Space Geodesy (IESSG) bought and received a network of Locata transceivers with two rovers. The purpose is to
solve the challenges identified when surveying in dense multipath areas (i.e. urban canyons). In this paper, the technology
is tested in an urban canyon scenario on the University park at the University of Nottingham. By comparing Locata position
solutions with the true positions calculated with a total station and a carrier-phase GPS, the results show that centimetre-level
accuracy is achievable in difficult environments in the presence of Wi-Fi signals. The rover’s estimated coordinates may diverge
in some cases. Finally, a comparison study shows that Real Time Kinematic GPS and Locata technologies have similar accuracy
when both are available. 相似文献
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在可见卫星较少时,GPS难以保持稳定的定位精度。Locata能够建立地面工作网络进行定位,它与GPS的组合是一种很好的解决方案。文中提出了一种Locata/GPS组合动态定位算法,并利用仿真数据对Locata,GPS和Locata/GPS的定位精度和收敛时间进行了试验。模拟试验表明Locata/GPS的DOP值和定位精度均优于Locata和GPS单系统,且收敛时间明显缩短;在可见卫星较少时,Locata/GPS的定位精度相比于GPS单系统有明显提高。 相似文献
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????Locataα????????λ????λ??????????????????????飬???????????????λ???????????α??λ?????????λ????????????????λ??λ?????????????????????Locata???????λ?????????cm??mm???? 相似文献
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