Well, not connection timeing, every server must have GPS receiver in that case, GPS time of detecting signal sending to one "main server" who calculate location from inforamtion collected from all other "pskmail" servers. If "trigger" time diference is more than 0.x seconds (uS, nS, something) than signal isnt from the same source. Main problem is detecting "trigger" and add to it precise time tag (gps) or how to do that. That can be nice challenge for programmers but very useful (maybe) for clients without gps and correct entered location to pskmail client. But maybe Im asking too much ! :) 73! Darko 9A3LI On Mon, Feb 20, 2012 at 9:37 AM, Rein Couperus <rein@xxxxxxxxxxxx> wrote: > Interesting idea Darko, PSKMAIL RADAR.... > > I think our TCP internet connection timing is not precise enough for light > speed > radio..... > > Glad the server is back, I need it often from here... > > Rein EA/PA0R/M >