Just updated the firmware on my GT31 to http://mtbest.net/GT31_FW_V1.4B0712T.ZIP
The new GT32 unit has Tom writing some software I am trying to understand the outcome of. I understand that the Fourier program is designed for using two 31s or a 32.
Displays the data in a nice table and gives an easy view of each run. Also has a google earth button to take you to the run in google earth with coloured sections to show the speed.
When I run my latest file through it (using a single 31) I get a slightly higher speed than realspeed 40.029 vs 39.85.
Is the program only more acccurate when using two units or is it designed to test the quality of the data?
Only a guess Lao, but maybe the difference is the way, the 3 readings are averaged in the 2 programs.
Tom's program calculates the average speed in a different way (Fourier v's Cubic Spline) and uses a more optimistic speed correction factor. It is not the method that is used by the WGPSSRC for records at this stage. We decided to use a more conservative correction for maximum confidence.
Thanks Sailquik.
I do like the GE feature though. Saves a kml file of the run you are looking at. Found it very useful for comparing best runs at a spot.
It is easy to save your file as a .gpx and open it in GE in RealSpeed as well. Just a couple more clicks. 
GPS-Results has a one click 'display in GE' which works great:
Here is my 'GPS-Speedskiing' from Mt Hotham last week (There was some snow - really
)
