GPS Simulator, Part 2

The GPS Simulator only creates GPGGA sentences. That's because the memory in the PICAXE-08M is limited to 256 bytes. And it was tough to cram that much into that limited amount of space. Eventually I'll get around to creating a simulator that produces all the GPS sentences in a way that looks like a near spacecraft on a mission. That's the one I'd like to produce as a kit.

GPS Simulator

I've been building new GPS Simulators for a customer in Texas. The simulator uses a PICAXE-08M to send sentences that look like the GPGGA sentences of a balloon in flight. Eventually I'll move this to a larger micro and have it simulator all the sentences of a GPS receiver on a balloon flight. Using the simulator lets you test a flight computer's program on the ground.

A ground test like this lets you find errors without leaving the ground (where it's a lot cheaper to correct).