NTRIP Client
Browse GNSS correction streams from any NTRIP caster, monitor live RTCM3 data with real-time decoding, and record observations to RINEX.
Connections are proxied through a minimal relay that forwards data without storing it. Your credentials are sent directly to the caster — nothing is logged or retained.
How It Works
- Enter a caster address and click Get Sourcetable to list available streams.
- Click any mountpoint to connect — look for the icon next to each stream.
- The live monitor shows message types, satellite C/N0, sky plot, and station metadata.
- Hit Record RINEX to capture observations and download a .obs file.
Related Tools
- Broadcast Ephemeris — live satellite health and orbital parameters from the IGS
- RINEX Viewer — analyze recorded RINEX observation files offline
- Positioning Calculator — convert station coordinates between ECEF, geodetic and UTM
- GPS Time Converter — convert GPS time, week number and other GNSS time scales
- Signal Spectrum — interactive PSD chart of all GNSS L-band signals
NTRIP FAQ
- What is NTRIP?
- NTRIP (Networked Transport of RTCM via Internet Protocol) is a protocol for streaming GNSS correction data over the Internet. A caster distributes data from GNSS reference stations to connected clients for RTK and DGNSS positioning.
- What is the difference between NTRIP 1.0 and 2.0?
- NTRIP 1.0 uses ICY-style responses (non-standard HTTP). NTRIP 2.0 uses standard HTTP/1.1 with chunked transfer encoding and the Ntrip-Version header. Most modern casters support both versions.
- What is a sourcetable?
- A sourcetable lists all available data streams (mountpoints) on a caster. Each entry includes the mountpoint name, data format, GNSS systems, location, bitrate, and authentication requirements.
- What is RTCM?
- RTCM is a binary format for GNSS correction data. RTCM 3.x uses MSM (Multiple Signal Messages) to carry observations for all constellations — GPS, GLONASS, Galileo, BeiDou and more.
- What are MSM messages?
- MSM (Multiple Signal Messages) are RTCM 3 message types (1071-1137) that carry full GNSS observations per constellation. MSM4 provides pseudorange and carrier phase; MSM5 adds Doppler and C/N0; MSM7 provides full-resolution observations.