基于Internet的GPS RTK数据传输的有效性分析

Availability analysis of internet-based GPS RTK

RTK技术具有实时高效等特点,使其在测量与导航领域得以广泛应用。传统的RTK数据传输模式为电台数传链路,其时空局限性的特点制约了RTK技术应用的进一步发展。随着Internet网络应用的蓬勃发展,GPS差分定位与RTK定位测量模式也相应产生巨大的变革,网络技术为GPSRTK技术提供了新的突破点:结合Inter-net技术来进行GPS高精度实时动态定位。本文通过分析TCP/IP和UDP两种Internet传输协议、GPS差分数据RTCM类型和字节大小,及其在两种网络协议下数据传输速度的比较,对应用Internet作为差分GPS数据传输方式进行测试与分析。

RTK (realtimekinematic) is widely used in surveying and navigation applications for its high accuracy and being available in real time. Traditional RTK datalink is UHF (Ultra High Frequency) signal, which limits the coverage in real time positioning due to its sightline transmitting. With the popularization of Internet, the progress of easy mobile Internet access has triggered research activities around new methods of distributing GPSdata in high precision positioning systems. The architecture of internet transmission protocol TCP and UDP, the types and bytes of RTCM are discussed in this paper.The possibility of using Internet to transmit GPS positioning data are discussed together with its advantage and disadvantage.