Who has experience in GPS positioning with an accuracy of less than a meter and without drift?

Question

satellite navigation

We are trying to build a module with precise positioning (less than a meter and no drift) and then determine the azimuth between the two modules. Has anyone had similar tasks and who has achieved what success in this? I mean RRR. With U-blox modules and the NMEA protocol, the drift is large, and we did not work with its second protocol. There are articles on this topic, and specifically, has someone achieved positioning with a declared accuracy of less than a meter using an additional signal from geostationary satellites? Does anyone have any work?

Answer 1

You can forget about NMEA, it's useless. We need binary messages with raw data (RAW + SFRB). With the base station in post-processing, the results are excellent.
In statics, of course, RRR gives more decent results, unless of course you have 6 extra hours. Although you can get into the meter range in 20 minutes, but this is without any guarantees.
All these miracles allow you to create RTKLib , not, there are a lot of post-processing programs, but they cost more than one salary.
And answering the question, yes, it is possible to achieve results, but the truth is not from "mythical" geostationary satellites, although if you are not in Mother Russia ...