Home / NTRIPThe standard way RTK corrections are sent over the internet. Think of it as internet radio for correction data.More setup: Trimble Catalyst (DA1 / DA2) with Trimble Mobile Manager
NTRIP setup: Trimble Catalyst (DA1 / DA2) with Trimble Mobile Manager
Catalyst uses Trimble's own CorrectionsLive info from a base station about how far off the satellite signals are, so your rover can cancel out the error.More by default (the Trimble Corrections Hub). To use your state network or another NTRIP service instead, you switch the correction source to Custom local in the Trimble Mobile Manager app.
Steps
- Open Trimble Mobile Manager, tap the menu and select Configuration.
- Tap GNSSGlobal Navigation Satellite System. The general name for GPS (USA) and the other satellite systems like GLONASS, Galileo and BeiDou.More correction source and pick Custom local. (The default, Auto, uses Trimble's own services.)
- Set Protocol to NTRIP.
- Enter your provider's server URL and Port. The app connects and downloads the list of Mount pointOne specific correction stream on a caster, like one channel on a radio. Each one comes from a certain station or network setup.More.
- Pick your mount point from the list.
- Set the GNSS source Reference frameA precise version of a datum, defined by real stations on the ground. ITRF2020 and NAD 83(2011) are examples.More your provider uses. If you don't know it, ask them, or pick Auto.
- Enter your username and password, then wait for a FixThe best RTK status. The receiver has finished its math and your position is good to a couple of centimeters.More.
- Heads up: Trimble says custom settings are not applied on a Catalyst Free subscription.
Before you start, get five things from your provider: the CasterThe internet server that hands out correction streams. Your rover logs in to it, like tuning into a radio station.More host (server address), PortA number that tells your device which "door" on the caster server to use. For NTRIP it's often 2101.More, username, password and mount point (the correction channel). What these mean. Find them on each provider page.
Source (official docs): Trimble Mobile Manager Help: Configure real-time corrections · Trimble Catalyst Help: GNSS corrections · Checked 2026-10-16. Menus can change with firmware, so follow the latest manual.