I have an autonomous robotcar using GPS for navigation. I am currently using RS+ as base station, and use M+ as rover on the robocar. I found it was very hard to get a “Fix” status. In most cases I only got “Float” status, it is very rare I could get “Fix” status. And it took a long time to get the status. So I am thinking upgrade to better receiver, such as RS2 and M2, but I do not have the budget to upgrade both. Can I just update RS+ to RS2 or just update M+ to M2?
Agree with @PotatoFarmer.
I would also advice you to check if there is noise in your setup. Usually a L1 with a short baseline and decent amount of open sky, should yield a FIX solution.
Do you have raw log from base and rover you can share?
The guys correctly said that if only one of the receivers is multi-band, it will not give an advantage.
First of all, I’d suggest checking the environmental conditions for both the base and rover. You should ensure that your single-band receivers have a clear sky view with no obstacles such as trees or buildings.
One more thing. If you transmit corrections via LoRa, there should be a line of sight between your base and rover.