青岛日偏食对GPS定位精度的影响  

Effect of GPS Location Accuracy Due to the Partial Solar Eclipse in Qingdao

作　　者：褚宏宪[1,2] 史慧杰[1,2] 冯京[1,2] 周晓明[1] 

机构地区：[1]国土资源部海洋油气与环境地质重点实验室,山东青岛266071 [2]青岛海洋地质研究所,山东青岛266071

出　　处：《海洋测绘》2011年第6期42-44,共3页Hydrographic Surveying and Charting

摘　　要：2009年7月22日日全食期间,在青岛采用固定点监测单频GPS信号,同时利用非日食期的单频GPS信号监测数据统计对比分析认为,青岛发生的日偏食现象,对GPS单频接收系统的导航定位精度有影响。表现为误差有所增大,接收卫星数减少,PDOP值增大。短时位置偏差最大值为4.02m,历时2min 48s。但青岛地区日偏食对GPS精确度影响较小,时间较短,对于低精度的海上调查导航数据精度影响较小,高精度的导航数据可以利用同步岸台GPS观测数据对比校正。During the total eclipse on July 22,2009,the authors monitored single-frequency GPS signals in Qingdao through fixed-points.The signals were compared with those in non-eclipse period.The result showed that the partial eclipse in Qingdao had effects on the navigation and positioning accuracy of single-frequency GPS receiver system,such as increasing error,decreasing number of satellites received and increasing PDOP values.In short-term,the maximum deviation of the position is 4.02m,which lasted 2 minutes and 48 seconds.However,in Qingdao,the partial eclipse which lasted only a short time has little effect on GPS accuracy,and the same as the low-precision marine survey navigation data accuracy.Therefore high-quality navigation data was required to make comparison and correction with GPS data obtained from synchronization shore station.

关 键 词：日食 电离层 全球定位系统 导航 精度 误差 

分 类 号：P228.4[天文地球—大地测量学与测量工程]