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			UNRESOLVED RTK ISSUES
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The system works: I get results ('solutions') which are better than standard GPS (GNSS).
However I am not getting the consistently-one-inch accuracy which some others on the internet seem to enjoy.

1. FIX AND FLOAT

The system goes to FLOAT solution quite quickly, but only seldom goes to FIX.
This is not a problem in itself, but others seem to be able to get the system to FIX, and have pretty much stay there.
I have not achieved this.

2. ACCURACY and CONSISTENCY.

The rover has a programmed test-path which takes it around the house, and around a meter away from various solid obstacles along the way.
Sometimes it completes without rescue, and sometimes it 'drifts' and needs rescuing.
Sometimes it goes quite beserk and just starts wandering away in a seemingly random direction, as it follows a completely inaccurate solution.

3. GPS and GLONASS SATELLITES.

The configuration file (rtkrcv.conf) is set to use GPS (USA) and GLONASS (Russia) satellites "pos1-navsys=", but
only GPS (USA) seem to be actually used. In particular

* rtkrcv.conf contains pos1-navsys=7 (ie, use GPS+SBAS+GLO))
* If "u-center" (a program provided by UBLOX) is run on a windows box, and the M8T connected to it, then it shows stats for the GLONASS satellites,
  clearly showing that the UBLOX-NEO-M8Ts are capable of recieving from the GLONASS satellites.
* If "rtknavi" is run (in wine or on a Windows box), then a status of the glonass satellites shows all zeros - suggesting they are not being used.

It is not clear why this happens - any suggestions are welcome.

4. CONCLUSIONS

None really, but on reflection I regret buying the CSG CSGShop M8T U-BLOX with the built-in antenna, is there is no option to swap-and-change antennas and processing units to try
to find a combination which might work better.