[GRASS-user] LOS, Fresnel Zones, Multi-Line wave propagtion
and GHz communications
russo at bogodyn.org
Thu Apr 17 11:58:33 EDT 2008
On Thu, Apr 17, 2008 at 05:36:18PM +0200, we recorded a bogon-computron collision of the <peter.hopfgartner at r3-gis.com> flavor, containing:
> Dylan Beaudette wrote:
>> There is also an open source application called 'splat' :
>> I do not know if splat can account for near-surface conditions (i.e.
>> Fresnel Zone) or higher elevation atmospheric parameters (ionosphere).
>> It would be nice to have a couple of more robust LOS-like modules in
>> GRASS for this type of work.
> from the description on the web page it seems that Fresnel Zones are in
> SPLAT, at least in recent versions.
> I will have a look at it, tomorrow.
SPLAT is pretty cool, and if all you want is to compute some RF coverage
maps it works well as a standalone application. It would make an interesting
project for GRASS integration.
As distributed, SPLAT only works when you give it digital elevation models
in a very specific file format, and it produces PPM output (not
georeferenced) to display its results.
I've often thought that it would be cool to adapt it to a GRASS module that
can work with any GRASS elevation data and produce a GRASS raster of RF
loss and radio coverage instead of an ungeoreferenced image file. SPLAT
itself is a fairly simple program once you get digging in it (the math is
not simple, but the code structure is), but the integration project has always
been too daunting for me.
Tom Russo KM5VY SAR502 DM64ux http://www.swcp.com/~russo/
Tijeras, NM QRPL#1592 K2#398 SOC#236 AHTB#1 http://kevan.org/brain.cgi?DDTNM
"And, isn't sanity really just a one-trick pony anyway? I mean all you get is
one trick, rational thinking, but when you're good and crazy, oooh, oooh,
oooh, the sky is the limit!" --- The Tick
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