Some Wi-Fi hardware manuals (haha) have installation instructions and they give rough indication of the attenuation through common obstacles such as walls, floors and whatnot. I remember seing one of those not long ago actually but I have no idea where it is :-(
The frequencies are close enough that it should be a useful indication of what to expect. An Internet search on the same subject might yield something. Of course, every case is different, and before you do a "permanent" installation, you may want to experiment with a long cable and do some comparisons using the signal level indications from the GPS data, or let it run for a dat and find out how much dropouts you got. Didier KO4BB > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Hal Murray > Sent: Tuesday, April 01, 2008 6:11 PM > To: [email protected] > Subject: [time-nuts] Attenuation of typical roof? (at GPS frequencies) > > Does anybody have any numbers? > > Suppose I have an antenna that is high in my attic. How much > do I gain by drilling a hole in the roof and moving it up a foot? > > If I knew the answer (even a rough one), I could compare > various ways to get a few more dB of signal and sort them by > cost or effort or ... > > > Is the attenuation significantly higher when the roof is > damp? I'm assuming > a sloped roof so the water won't be very thick. (as compared > to a flat roof > that might have puddles) > > How does a wet roof compare to the water in the air when it's > raining? (or > fog, snow...) > > Is there a good web site that covers this? > > Internal Virus Database is out-of-date. Checked by AVG. Version: 7.5.519 / Virus Database: 269.21.8/1339 - Release Date: 3/22/2008 4:43 PM _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
