In previous articles on SparkFun's website, I've covered how to get publicly accessible RTCM correction data, but it can be spotty . I've also covered how to set up your own temporary base to send RTCM correction data over a telemetry radio link, but challenges occur if you are a kilometer or more from your base. Before moving further, be sure you are comfortable with Getting Started with U-Center, and check out Sparkfun's "What Is GPS RTK?" tutorial. Then consider this article the sequel to "Setting up a Rover Base RTK System" [5].We're going to talk a lot about NTRIP. I found all the descriptions and graphics describing NTRIP to be frustratingly confusing. NTRIP is just a fancy means of getting correction data from a spot, over the Internet, to a rover. Think of it like a music stream for your rover. For your rover to jam, you need to provide it with a constant source of music. There's a ton of services out there for music (YouTube, Spotify, Pandora). Similarly, there are all sorts of sources for RTCM (Trimble, Leica, Telit, etc.). All these RTCM services charge different amounts of money and act just differently enough to be confusing. But all I want is my music!
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