中圖分類號(hào)： TN961,；TP311 文獻(xiàn)標(biāo)識(shí)碼： A DOI：10.16157/j.issn.0258-7998.211514 中文引用格式： 劉亞,，何文濤，張潔. 基于GAMP的實(shí)時(shí)PPP軟件實(shí)現(xiàn)及性能分析[J].電子技術(shù)應(yīng)用,，2022,，48(2)：55-59，64. 英文引用格式： Liu Ya,，He Wentao,，Zhang Jie. Implementation and performance analysis of real time PPP software based on GAMP[J]. Application of Electronic Technique，2022,，48(2)：55-59,，64.
Implementation and performance analysis of real time PPP software based on GAMP
Liu Ya1，2,，He Wentao1,，3，Zhang Jie1,，2
1.Institute of Microelectronics of Chinese Academy of Science,，Beijing 100029，China,； 2.University of Chinese Academy of Sciences,，Beijing 100049，China,； 3.Hangzhou Zhongke Microelectronics Co.,，Ltd.，Hangzhou 310053,，China
Abstract： Aiming at the problem that GAMP software lacks the function of real-time precise point positioning at this stage, this paper analyzes and studies the principle and process of the post precise point positioning algorithm in the software, compares the different data sources and processing methods of the real-time and post precise point positioning, and combines with the processing method of existing real-time data processing software. On the basis of GAMP, a real-time data stream receiving and preprocessing module is added. At the same time, the source of satellite precise orbit and clock bias changes from post precise ephemeris file to broadcast ephemeris combined with real-time corrections. Through the real-time precise point positioning experiment of four stations and UBLOX-F9T module, it can be found that the static real-time precision point positioning accuracy can reach centimeter level and the dynamic accuracy can reach decimeter level, which meets the needs of real-time precise point positioning.
Key words : real-time PPP,；real-time data stream；NTRIP protocol,；UBLOX protocol,；combined SSR
0 引言
精密單點(diǎn)定位(Precise Point Positioning，PPP)利用衛(wèi)星觀測(cè)及導(dǎo)航數(shù)據(jù)，事后精密星歷等可在全球范圍內(nèi)實(shí)現(xiàn)高精度定位[1],，相較于實(shí)時(shí)動(dòng)態(tài)(Real-Time Kinematic,，RTK)技術(shù)[2]擺脫了參考站的束縛，可以適用于更多的測(cè)量環(huán)境,。
2007年國際全球?qū)Ш叫l(wèi)星系統(tǒng)(Global Navigation Satellite System，GNSS)服務(wù)組織(International GNSS Service,，IGS)啟動(dòng)了實(shí)時(shí)項(xiàng)目(IGS Real-Time Pilot Project,，IGS-RTPP），2013年4月1日起利用全球?qū)崟r(shí)跟蹤網(wǎng)采集的GNSS數(shù)據(jù),，實(shí)時(shí)估計(jì)軌道及鐘差改正數(shù)以空間狀態(tài)表示(State Space Representation,，SSR)形式，通過國際海運(yùn)事業(yè)無線電技術(shù)委員會(huì)標(biāo)準(zhǔn)協(xié)議(Radio Technical Commission for Maritime services,，RTCM)編碼,，基于RTCM網(wǎng)絡(luò)傳輸協(xié)議(Network Transport of RTCM via the Internet Protocol，NTRIP)向全球用戶播發(fā)[4],。對(duì)于實(shí)時(shí)PPP,，可以通過廣播星歷結(jié)合SSR改正獲得實(shí)時(shí)精密星歷來進(jìn)行高精度定位解算[5]。目前已有的處理實(shí)時(shí)PPP軟件有RTKLIB[6]和BNC[7]等,，不過在PPP處理策略或配置選擇上沒有GAMP軟件豐富,，但是GAMP是事后PPP處理軟件，所以本文在GAMP軟件的基礎(chǔ)上增加了實(shí)時(shí)數(shù)據(jù)接收及處理模塊,，完成了實(shí)時(shí)PPP軟件的搭建,，驗(yàn)證了其處理實(shí)時(shí)數(shù)據(jù)及實(shí)時(shí)PPP定位解算的功能。
