This paper analyzes the components and features of GPS, discusses differential dynamic positioning technology with GPS in real time and its error sources.
分析了全球定位系统GPS的组成及功能，探讨了GPS实时差分动态定位技术及其误差来源。
The major error source of GPS systems, especially of differential GPS, is the multipath signals. It will deteriorate the precision of positioning.
GPS测量，尤其是差分GPS测量，多径信号是主要的误差来源，会引起定位精确度的恶化。
For the test requirement of precision agriculture, differential systems of GPS position were adopted to increase the position accuracy of GPS system.
为了精准农业技术示范试验需要，采用了GPS定位差分系统，以提高GPS系统定位精度。
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