Well… its a interesting problem 
I assume the filed named MBM12310.17o 42193Kb is log from base right?
And the MBM12310.obs 212Mb is the observation files used to correct base?
I would think so, because this gived med Q1 and very accurate reading with coordinates that you attatched in .excel format. But from the time 1030 to about 1300.
The Q1 fix you get, is that at spike AR or did you get Q1 for the entire run on the rover?
A quick process gives me Q1 spike with RINEX header for a short amount of this. I would think that rinex header is giving you fals reading, but i could be wrong.
