Has anyone used a GPS unit that provides sub meter accuracy under the forest canopy? I am not concerned if I can get this accuracy real-time or post processing as long as I can have it eventually. All I have ever used is units of up to about $500 and they do not do the trick. I have seen surveyor grade units with millimeter accuracy in the open, but I wonder how well they do in the forest, especially when the slope prevents view to nearly half of the satellites... I intend to use it in leaves-off condition to alleviate at least some of the obstruction.
Thanks, Luben http://saes.aamu.edu/forestry/CFEApeople/bios/Dimov.htm
