Senior Member
Joined: 25/09/2015
Location: AustraliaPosts: 203
| Posted: 05:15am 02 Nov 2022 |
I used to do surveying. Differnetial GPS does the corrections on the signal before it gets turned into a position. If you try to do corrections based off the processed lat/long you will pretty much just get random noise that might even be worse than the original signal to the best of my knowledge.
You can get RTK kits relatively cheap now (ie $600 for a set). I would recommend going with an ardupilot brain and one of the RTK kits from HERE or EMLID if you want to go cost effective off the shelf. Quite mature system that has been field tested for you.
On the diy route there's two options that I see as feasible. Look into software called RTKLIB and try to find two cheap GPS units on aliexpress that are supported. Fairly steep learning curve though.
Second you could triangulate position based off the bearing to 2-3 known points around the yard. Either an IR beacon or some sort of visual landmark like an april tag then run machine vision on a raspberry pi with a few cheap USB cams hooked up.