NleahciM wrote: The main mistake alot of people make when trying to do differential GPS is to just subtract how much a non-mobile GPS device is moving from the mobile GPS's position. This is fundamentally a terrible thing to do, as it would be incredibly silly to assume that the two GPS devices are using the exact same satellites. (among many other silly reasons)
Yeah that link does have some interesting info for sure.
I'm still not sure what kind of error I could expect with a nearby (<300 ft) reference station though. Or are the differential corrections broadcast from the towers actually comparable in the kind of accuracy boost they give?
I should probably stop being cryptic, after all I get on other people's cases for that when they ask for help without saying what they need it for. Basically I was thinking about converting a Friendly Robotics Robomower, a self-propelled and guided electric mower, which uses a buried wire, like the Invisible Pet Fence, for boundaries and kind of bumps back and forth randomly off obstacles and perimeter. Uses a magnetic compass to stay on heading once it starts in a line, but the actual direction is not chosen with great care. The process is random and to actually ensure the entire lawn is mowed without a single unmowed spot takes enough runtime to do the lawn many times over.
It would be an interesting project.
I thought what I'd do was, I'd pretend I was one of those deaf-mutes.