NTRIP & GGA essentials
NTRIP & GGA essentials - the path to RTK: FIX
Most NTRIP workflows require your rover’s approximate position (NMEA GGA) to choose the nearest reference or create a virtual reference (VRS). If GGA is not sent shortly after you connect, many casters won’t stream corrections.
Checklist that applies to every app
• Use the regional hostname (preferred). If your device only accepts numbers or DNS is blocked, use the numeric IP fallback. Port = 2101.
Enter credentials exactly as provided in your RTKdata.com account
Mountpoint:
AUTO(recommended) orAUTO_WGS84/AUTO_ITRF2020/AUTO_ITRF2014(ALL CAPS)Send receiver position (NMEA GGA): ON
Go outdoors with open sky and wait for RTK: FIX
Where to enable GGA (common apps)
Emlid Flow: Correction input → NTRIP → Send receiver position (NMEA) = ON
u‑center (u‑blox): Receiver → NTRIP Client… (client logic uses your current position; ensure the receiver is outputting a valid solution)
Septentrio RxTools: RxControl → Output Settings → NMEA → GGA @ 1 s (USB/COM); DataLink will forward it
SW Maps: NTRIP settings → Send NMEA GGA to caster = ON
EOS Tools Pro: NTRIP/Differential → Send NMEA GGA to caster = ON
Vertical reference (heights)
RTKdata.com streams positions in the selected geodetic frame; heights are ellipsoidal. For orthometric (mean sea level) elevations, apply a geoid in your GIS/photogrammetry workflow (or on the rover if supported).
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