On Mon, 2007-07-30 at 11:57 +0300, [EMAIL PROTECTED] wrote: > On Mon, July 30, 2007 02:12, Brad Douglas wrote: > > On Sun, 2007-07-29 at 18:54 +0300, [EMAIL PROTECTED] wrote: > > > >> 2. Is there a similar module, or a way using r.los, to compute los > >> coverage in a specific altitude above the ground (i.e. 2000m)? > > > > r.los obs_height=2000 in=in_map out=out_map coord=x,y > > > > option "obs_height" is your height above ground. > > "obs_height" corresponds to the the height of the "antenna", right? I > mean, it corresponds to the altitude from which the observer "looks" at > the area, correct?
Correct. In this case the observer is an antenna. > If yes, I'm interested in computing the los coverage in a specific > altitude above the ground for all the surrounding area (i.e., if an > aircraft flies at 5000ft above the ground, I want to compute the los > coverage from the observing point at this altitude level to check if the > aircraft is in the los coverage). r.los is not the best piece of software to model antenna/RF links. It does not take Fresnel effects, antenna orientation, or pattern into account. I added dirty support for 1st Order Fresnel effects for a couple UHF bands some time ago, but it needs a lot more work if I'm going to release it as a module. It did what I needed it to do and nothing more. -- 73, de Brad KB8UYR/6 <rez touchofmadness com> _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
