The Networked Transport of RTCM via Internet Protocol (NTRIP) is a

protocol Protocol may refer to: Sociology and politics * Protocol (politics), a formal agreement between nation states * Protocol (diplomacy), the etiquette of diplomacy and affairs of state * Etiquette, a code of personal behavior Science and technology ...

for streaming

differential GPS Differential Global Positioning Systems (DGPSs) supplement and enhance the positional data available from global navigation satellite systems (GNSSs). A DGPS for GPS can increase accuracy by about a thousandfold, from approximately to . DGPSs ...

(DGPS) corrections over the

Internet The Internet (or internet) is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to communicate between networks and devices. It is a '' network of networks'' that consists of private, p ...

for

real-time kinematic positioning Real-time kinematic positioning (RTK) is the application of surveying to correct for common errors in current satellite navigation (GNSS) systems. It uses measurements of the phase of the signal's carrier wave in addition to the information con ...

. NTRIP is a generic, stateless protocol based on the

Hypertext Transfer Protocol The Hypertext Transfer Protocol (HTTP) is an application layer protocol in the Internet protocol suite model for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide We ...

HTTP/1.1 and is enhanced for GNSS data streams. The specification is standardized by the

Radio Technical Commission for Maritime Services The Radio Technical Commission for Maritime Services (RTCM) is a non-profit international standards organization. Although started in 1947 as a U.S. government advisory committee, RTCM is now an independent organization supported by its member org ...

(RTCM). NTRIP was developed by the German Federal Agency for Cartography and Geodesy (BKG) and the Dortmund University Department of Computer Science. Ntrip was released in September 2004. The 2011 version of the protocol is version 2.0.Version 2.0 with Amendment 1, June 28, 2011
/ref> NTRIP used to beThe "public version" of the protocol is missing all protocol details and examples, and refers to purchase the document from RTCM; it can be downloaded fro
BKG
an

open standard An open standard is a standard that is openly accessible and usable by anyone. It is also a prerequisite to use open license, non-discrimination and extensibility. Typically, anybody can participate in the development. There is no single definitio ...

protocol but it is not available freely (as of 2020). There is an

open source Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized so ...

implementation available fro
software.rtcm-ntrip.org
from where the protocol can be reverse-engineered.

References

{{Satellite navigation systems Global Positioning System