Ntrip: Networked Transport of RTCM via Internet Protocol
• is a protocol streaming real-time corrections over the Internet.
• is a generic protocol based on the Hypertext Transfer Protocol HTTP/1.1.
• is used to send differential correction data or other kinds of streaming data to stationary or mobile users over the Internet. This process allows simultaneous computer, laptop, PDA, or instrument connections to a broadcasting host.
• supports wireless Internet access through mobile IP networks like digital cellular phones or modems.
The Ntrip Server could be the GPS instrument itself. This setup means the GPS instrument is both the Ntrip Source generating the real-time data and also the NTRIP Server transferring this data to the Ntrip Caster.
Ntrip Caster The Ntrip Caster
• is an Internet server handling various data streams to and from the Ntrip Servers and Ntrip Clients.
• checks the requests from Ntrip Clients and Ntrip Servers to see if they are registered to receive or provide real-time corrections.
• decides whether there is streaming data to be sent or to be received.
Ntrip Client
The Ntrip Client receives data streams. This setup could be, for example a realtime rover receiving real-time corrections.
In order to receive real-time corrections, the Ntrip Client must first send
• a user ID
• a password
• an identification name, the so-called Mountpoint, from which real-time corrections are to be received to the Ntrip Caster.
Ntrip Server
The Ntrip Server transfers data streams.
In order to send real-time corrections, the Ntrip Server must first send
• a password
• an identification name, the so-called Mountpoint, where the real-time corrections come from
to the Ntrip Caster.
Before sending real-time corrections to the Ntrip Caster for the first time, a
registration form must be completed. This form is available from the Ntrip
Caster administration centre. Refer to the website of the Ntrip Caster administration centre.
Ntrip Source: The Ntrip Source generates data streams. This setup could be base sending
out real-time corrections.
Ntrip system components- Ntrip consists of three system components:
