To give an idea about the possible improvement in antenna location available by 
post-processing the data,  I first did a 2 hour self-survey and that put the 
receiver into position hold mode.  Then I collected RINEX data for 16 hours.   
The post-processed lat/lon/alt values differed around 1/1/3 meters better than 
the self-survey values (with estimated error ellipses of 0.17/0.15/0.4 meters). 
  Those results were with the "ultra rapid" orbits.  It will be interesting to 
see what they look like when the final precise orbits are available in a couple 
of weeks.

I also need to see how those values compare to Lady Heather's precision survey 
results.
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