Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005) · 2005 · 46 citations · 0 references
ComputingComputer EngineeringComputer ScienceComputer NetworksGeodesyGeographic Information SystemsCommunication SystemsInternet Protocol SuiteNetwork ProtocolsReal-time Communication ProtocolsWireless Communication ProtocolsWireless NetworksBroadcastingData StreamingGlobal Navigation Satellite Systems ReceiversGlobal Positioning System Survey DataGnss PositioningGnss Survey DataInternet ProtocolReal-time Data Transmission
Ntrip, defined by RTCM SC‑104 in 2004, is a protocol that streams GNSS data over the Internet to stationary or mobile users, originally for RTCM but extensible to other data types, and was motivated by the rise of mobile Internet access. The paper envisions future applications of Ntrip for satellite orbit and clock estimation, health monitoring, ionosphere and troposphere parameter estimation, and emphasizes its potential for scientific, research, public, and commercial GNSS services. Developed by the German BKG within the EUREF‑IP Pilot Project, Ntrip distributes GNSS streams to multiple users over the Internet, supporting simultaneous PC, laptop, PDA, or receiver connections and wireless access via GSM, GPRS, EDGE, and UMTS networks. Ntrip has already proven useful worldwide for positioning and navigation, and the paper highlights its promise for science, research, and commercial applications.
In September 2004 the Radio Technical Commission for Maritime services Special Committee 104 (RTCM SC- 104) completed a new standard which defines a protocol for streaming GNSS data to stationary or mobile users over the Internet. Titled “Networked Transport of RTCM via Internet Protocol (Ntrip)” the standard is named for the widely used RTCM data format, but it can also be used for streaming other kinds of data. The development of Ntrip was initiated by the German Federal Agency for Cartography and Geodesy (Bundesamt fur Kartographie und Geodasie, BKG) within the framework of the EUREF-IP Pilot Project [1]. Although there are uses for stationary DGNSS receivers that could access the Internet via landline, the growing availability of Internet service through the mobile telephone network was a persuasive reason to develop and formalize a publicly available Internet protocol for streaming DGNSS data. Ntrip is designed to distribute GNSS streaming data to stationary or mobile users over the Internet, allowing simultaneous PC, Laptop, PDA, or receiver connections to a broadcasting host. Ntrip supports wireless Internet access through Mobile IP Networks like GSM, GPRS, EDGE, or UMTS. RTCM’s new Ntrip standard already proved to be useful in support of positioning and navigation applications worldwide. Future applications may comprise satellite orbit and clock estimation, satellite health monitoring, global or regional estimation of ionosphere parameters or local streaming of troposphere parameters for Networked DGNSS/RTK services. The paper draws attention to IP- streaming for GNSS applications via Ntrip and its potential for science and research as well as public and commercial services in many areas.