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Networked Transport of RTCM via Internet Protocol

The Networked Transport of RTCM via Internet Protocol (NTRIP) is a protocol for streaming RTCM data over the Internet, commonly used in real-time kinematic positioning. NTRIP is a generic, stateless protocol based on the Hypertext Transfer Protocol (HTTP/1.1) and is enhanced for GNSS data streams.

Availability
A simplified version of NTRIP 1.0 used to be available for free. It does not have any protocol details or examples, and refers to purchase the document from RTCM. RTCM-NTRIP provides open-source (GPL v2) implementations of NTRIP: a minimal client-server pair (ntripclient and ntripserver) and a feature-rich BKG Ntrip Client (BNC). The open-source Real-time Kinematic Library (RTKLIB) also implements NTRIP. Under GPLv2, it is legal to reverse-engineer the protocol using the code provided. Another open-source (Apache License v2) implementation of NTRIP is provided by the Orekit space-flight dynamics library, allowing to parse RTCM correction messages, RTCM ephemeris messages as well as IGS generic SSR messages. == Service providers ==
Service providers
Data from International GNSS Service can be obtained from five providers for free (some of which require registration): BKG, CAS, NASA CDDIS, Geoscience Australia, UCAR. There are site-specific streams containing observation data (for dGPS/RTK) and state-space data (for PPP) as well as combined state-space streams. Multi-GNSS is used. ==References==
Source: Wikipedia ↗
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