The Wide- and Local-Area Combined GNSS Real-Time Precise Positioning Service System and Products
The Wide- and Local-Area Combined GNSS Real-Time Precise Positioning Service System and Products
复制标题
DOI：
10.1007/978-981-10-4594-3_34
复制
发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
Zhiqiang Dai;Qile Zhao;Yifei Lv;Jia-xing Song;Jinning Zhou;Sheng Yang;Ming Gu
中科院分区：
文献类型：
--
作者：
Zhiqiang Dai;Qile Zhao;Yifei Lv;Jia-xing Song;Jinning Zhou;Sheng Yang;Ming Gu
随着全球导航卫星系统（GNSS）的发展，多GNSS组合实时精密定位已成为当前GNSS应用的发展趋势。虽然各种导航系统都能提供标准单点定位（SPP）服务，但由于定位精度较低，仅限于低精度导航。为了提高卫星的定位精度，必须进行精密的外部轨道和钟改正。基于武汉大学的超快速精密轨道产品，对GPS、GLONASS、BDS和Galileo系统进行了精密轨道和钟改正估计，为广域精密定位提供了支持。对于本地用户，实时服务系统可以提供FCB以及对流层和电离层延迟校正模型。所有这些产品都被编码并通过互联网广播给精确定位用户。用户可以利用这些实时产品对广播星历的轨道和钟差进行修正，有效地提高单点定位精度，也可以进行常规的实时PPP定位。同时，给出FCB和大气延迟改正产品，用户也可以进行PPP-RTK定位。
With the development of Global Navigation Satellite System (GNSS), Multi-GNSS combined real-time precision positioning has become the current trend of GNSS application. Though every navigation system can provide the Standard Point Positioning (SPP) service, it is limited to the low precise navigation because of the low accuracy. The external precise orbit and clock correction is necessary to improve the positioning accuracy. Based on the super-fast precise orbit product of Wuhan University, we estimate the precise orbit and clock correction for GPS, GLONASS, BDS and Galileo system, which can support the wide-area precise positioning. For the local-area users, the real-time service system can provide the FCB and tropospheric and ionospheric delay correction model. All these products are encoded and broadcasted to the precise positioning users via Internet. Users can use these real-time products to correct the orbit and clock error of broadcast ephemeris to improve the SPP precision effectively, or carry out the regular real-time PPP positioning. Meanwhile, given the FCB and atmospheric delay correction products, users can also carry out the PPP-RTK positioning.