Differential GPS Reference Station Design Based on OEM
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摘要: 介绍了差分GPS(DGPS)的定位模型以及RTCM SC-104数据格式及其电文编码,提出了利用廉价的GPS-OEM(原始设备制造商)建立基准站的设计方案,方法是利用GPS-OEM和微处理器构成硬件系统,利用GPS-OEM输出的二进制差分修正数据,将其编码为RTCM SC-104电文来进行设计.实验结果表明这种DGPS基准站同样可以达到1~5 m的水平平面定位精度,因此具有性能价格比高,实用灵活的优点.Abstract: The DGPS positioning model is introduced and the RTCM SC-104 message content is described. The design scheme of the DGPS reference station based on cheap GPS-OEM is proposed. This kind of DGPS reference station is composed of GPS-OEM and microprocessor. The general GPS receiver only can receive the RTCM SC-104 differential correction message, so the binary correction message output by GPS-OEM must be encoded into the RTCM SC-104 standard format. The DGPS positioning experiment was made. The experiment result proves that the positioning precise of the DGPS system constructed by this DGPS reference station can reach to 1~5 meters. Therefore, this DGPS system is economical and practicable.
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Key words:
- positioning /
- difference /
- correction /
- reference
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[1] 丁胜昔. 差分GPS技术在北京市公交ITS中的应用 . 北京:北京航空航天大学电子工程系,2000. [2]Kalafus R M. 104专委会关于差分GPS工作的推荐意见[J]. 导航,1988(4):9~20. [3]王广运,郭秉义. 李洪涛. 差分GPS技术与应用[M]. 北京:电子工业出版社,1996. -
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