|
|||||
|
|
| ???GPS???????λ????????????? | |
| 引用本文： | 苏小宁,孟国杰,胡新康,赵国强,伍吉仓,任金卫.???GPS???????λ?????????????[J].大地测量与地球动力学,2014,34(2):150-154. |
| 作者姓名： | 苏小宁 孟国杰 胡新康 赵国强 伍吉仓 任金卫 |
| 作者单位： | 1）中国地震局地震预测研究所（地震预测重点实验室），北京 100036 2）中国地震局第一监测中心，天津 300180 3）同济大学测绘与地理信息学院，上海 200092 |
| 基金项目： | 国家自然科学基金（41174004）；科技部国际科技合作项目（2010DFB20190）；地震行业科研业务专项（200708030）；中国地震局地震预测研究所基本科研业务费专项（2012IES010302） |
| 摘 要： | ???t??????λ??????λ????????????GPS?????????????????д?????????????????????????????·????????????????λ????????????????з????????????λ??????????е?EW??NS???????????7.3??7.1??16.0 mm??????λ??EW??NS???????????5.0??5.2??14.7 mm????????????λ???????????λ?????1.9~2.3 mm?????ù????????????о??????λ??????????????????????????????????????е?????????????????????λ??????????0.1 Hz??????????????????????????0.1 Hz??????????????????????????λ??????????????????????????????????????????????????????????????????????????????????????????????????????????λ????????????????????????????????????????????????λ????????????????????????????????? |
| 关 键 词： | ???????λ ????λ ????? ????????? ?????????? |
| 收稿时间： | 2013-10-21 |
PRECISION AND NOISE CHARACTERISTICS OF HIGH-FREQUENCY GPS EPOCH-BY-EPOCH POSITIONING |
|
| Su Xiaoning,Meng Guojie,Hu Xinkang,Zhao Guoqiang,Wu Jicang,Ren Jinwe.PRECISION AND NOISE CHARACTERISTICS OF HIGH-FREQUENCY GPS EPOCH-BY-EPOCH POSITIONING[J].Journal of Geodesy and Geodynamics,2014,34(2):150-154. | |
| Authors: | Su Xiaoning Meng Guojie Hu Xinkang Zhao Guoqiang Wu Jicang Ren Jinwe |
| Institution: | 1）Key Laboratory of Earthquake Prediction，Institute of Earthquake Science，CEA，Beijing 100036 2）First Crust Monitoring and Application Center，CEA，Tianjin 300180 3）College of Surveying and Geo informatics，Tongji University，Shanghai 200092 |
| Abstract: | High frequency observations of 12 Continuous Operational Reference System（CORS）GPS stations in Tianjin were processed with precise point positioning（PPP）and relative difference positioning（PRP）to estimate the absolute and relative epoch by epoch positions.The Modified sidereal filtering was used to correct multipath effect of high frequency position time series.Positioning precision of PPP for east，north and vertical components are 7.3 mm，7.1 mm and 16.0 mm，respectively.The precision of PRP for east，north and vertical components are 5.0 mm，5.2 mm and 14.7 mm，respectively.Compare to PPP，the precision of PRP is improved as 1.3 mm to 2.3 mm.According to the power spectral density，the noise is not only white noise.For PPP，the noise at frequencies below 0.1 Hz decreases with frequency and becomes flat at higher frequencies.However，for PPP，the noise at whole frequency band decreases with frequency.The difference of noise between PPP and PRP occur at high frequencies up 01HzAnd then，the spectral indexes of power law noise are estimated simultaneously with amplitude of white noise using maximum likelihood estimation.The white noise amplitude of PRP is much larger than PPP’s.The noise of PRP can be best described by a combination of white noise plus random walk noise.However，the noise of PPP can be best described by a combination of flicker noise plus white noise. |
| Keywords: | precise single positioning relative positioning Root Mean Square (RMS) Power Spectral Density (PSD) Maximum Likelihood Estimate (MLE) |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 | |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 | |