Sources:
http://facility.unavco.org/kb/questions/291/What+is+NTRIP%3F
http://gisdevelopment.net/technology/gps/images/ma06102_1.jpg
When we dial-in to SmartNet after establishing our GPRS/UMTS internet connection on our GNSS-Rover, we are greeted with the “Net 1: Connected”, then “Connected to NTRIP Caster” info messages. But what do they really mean?
NTRIP or "Networked Transport of RTCM via Internet Protocol," is a protocol developed by the Federal Agency for Cartography and Geodesy of Germany (BKG) that enables streaming of DGPS or RTK correction data via the internet.
There are three major parts to the NTRIP system: The NTRIPClient, the NTRIPServer, and the NTRIPCaster:
- The NTRIPServer is a PC running software (Leica Spider) communicating directly with a GNSS reference station (the physical SmartNET infrastructure). The NTRIPServer serves as the intermediary between the network of GNSS receivers (NTRIPSource) streaming RTCM data and the NTRIPCaster.
- The NTRIPCaster is a HTTP server which receives streaming RTCM data from one or more NTRIPServers and in turn streams the RTCM data to one or more NTRIPClients via the internet.
The NTRIPClient (users in the field) receives streaming RTMCv3.1 data from the NRTIPCaster to apply as Real-Time corrections to a roving GNSS receiver (Leica SmartRover). It is the NTRIPCaster that authenticates our User Name and Password as we dial in to the “SmartNet Main” IP-address (217.146.121.50 / 7801).
For more information about SmartNet licenses please contact sales@sccssurvey.co.uk .
If you are an existing user, and need to double-check your license details or expiration dates, please contact techsupport@sccssurvey.co.uk .
For more info on Network RTK software solutions please see http://www.leica-geosystems.com/en/Product-News_934.htm?changelang=true&id=3272