That is what i also understand. In the USA, they can be included with GPS to help obtain a fix, so when SBAS is available, best to select them also in conjunction with GPS.
For awhile, I was under the impression, being in the the central USA, that couldn’t use China’s BEIDOU? Not sure how i arrived at that a year ago or so? But i am finding i can switch back and forth with BEIDOU and GLONASS to get a fast fix depending on which has more sats and good sat configuration in skyplot.
I noticed the other day, i think it was bides screenshot of SNR and it had BOTH GLONASS AND BEIDOU selected at the same time… that must be the RS2! ; )
Speaking of that “really smart person”… he must be busy doing more RS2 testing? Hmm… that could be a few smart people? ; ) Thanks guys for all the great help you provide here… you know who you are!