Tech Chat - What is NTRIP?
Usually when surveyors use RTK receivers, Ntrip protocol is used more or less for data transmission. And sometimes you don't even know you’re using it. So do you know what Ntrip is and how does it serve our precise positioning?
WHAT IS NTRIP
Ntrip (Networked Transport of RTCM via Internet Protocol) is a protocol for streaming differential GNSS data in RTCM format between GNSS receivers over the Internet, which was developed by the German Federal Agency for Cartography and Geodesy.
In order to get RTK fixed solution and centimeter positioning, at least one base and one rover are required for real-time GNSS data correction. Ntrip serves for real-time correction data transfer in the process.
The Ntrip consists of Ntrip sever, Ntrip caster and Ntrip client as shown in the figure above.
Commonly, there will be CORS stations or user setup base stations transporting GNSS differential streams to Ntrip caster via internet. Ntrip caster will broadcast the streams via the specific internet port to Ntrip client (users’ rovers) where it receives request from.
NTRIP VS UHF
Usually, when working with RTK receivers, there are two main methods for correction data transmission – Internet (Ntrip) or radio.
For normal UHF (radio), the working range of most common GNSS receivers is around 3km. For longer work range, an external radio and power supply are required and that’s a heavy set of equipment. Besides, weather, terrain and electromagnetic interference limit the capability and quality of data transmitted through radio.
As for Ntrip, the working range and environment limitations will no longer be an issue. However, it requires good internet coverage and a 4G-capable GNSS receiver.
So you may need to choose the appropriate GNSS device according to your working situation. Or a device with both functions - SingularXYZ Y1 GNSS Receiver which integrates radio and 4G together, providing you with flexible transmission, which also reduces the burden of external radios.
Learn more about Y1 GNSS Receiver.
https://www.singularxyz.com/Y1_Land_Surveying_Solution.html
