[time-nuts] Computing GPS Distance Error in Time

[Mark Sims]

I'm not using any special surveying software,  just some code that I wrote.  
The controller box and remote box both have GPS units in them.  The controller 
periodically requests the remote unit's position and just calculates the vector 
distance/bearing between the two units.  The application was intended to work 
with the boxes spaced 50-5000 feet apart.   I was rather surprised how well 
they worked very close together.  The next step is to add a magnetic compass 
module to the controller box so that it can draw a map of the remote units in 
relation to the orientation of the controller box.
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What type of real-time surveying software are you using?  I'm looking for 
surveying/plotting software for Linux to keep a close on the timing stability 
of my Adafruit.                                           
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