摘要
介绍了GPS实时差分系统基本原理及实现过程,提出了基于GPRS的GPS实时差分系统的总体结构;完成了基于GR47的GPRS数据传输模块的硬件和软件设计;实现了服务器软件数据监控及处理功能;采用无缝技术实现GPRS与Internet链接,建立了GPS差分数据传输通道;提出了通讯链路时间延迟的测试方法,分析了过大时间延迟的原因并给出了解决方案。实际测试结果表明:基于GPRS的GPS实时差分系统达到了厘米级定位精度。
The primary principal of GPS real time differential system and process of it＇s application are introduced. The structure of the system is proposed by analyzing the feasibility of data communication link based on GPRS. The data transfer module based on GR47 and server monitor soft is carded out. The technology of joining Internet to GPRS seamlessly is used to set up data communication channel that send GPS differential data from a GPS-base to GPS -rovers. A method is put forward to test time delay of GPRS data communication link. While analyzing time delay according to the testing result, the method of decreasing time delay is proposed. The result of positioning precision test shows that the positioning precision of the GPS real time differential system based on GPRS has attained cm-level.
出处
《中国惯性技术学报》
EI
CSCD
2006年第2期64-68,共5页
Journal of Chinese Inertial Technology
基金
国土资源部科技专项"土地变更调查现代化技术方法研究(编号:200210102)"资助课题
