On Thu, 2006-08-03 at 21:53 -0400, Reza - Asterisk Enthusiast wrote: > Hello Andrew! > > Ok... I am inspired with this > 8KM link. Perhaps a laser pointer would > help you to aim in less time? Did you just put the antenna of the router on > the LNB of the disk? Do you have any schematics/docs/journals that you > kept - with perhaps picture etc... of this pet project?
10km is pretty trivial especially if you have a GPS device, most consumer grade laser devices don't go that far, although there is hardware designs on the net for IR based 10M networking which is good for about 1km... The trick with any kind of distance is fresnel zone, not just line of sight (reflection can cancel out your signal), and to allow for the curve of the earth verse 2.4Ghz RF propagation (RF at 2.4Ghz is 4/3rds that the curve of the earth etc etc etc)... I loaded 3 degree NASA STSM data into nodedb.com and you can do rough line of sight plots including inclination and azimuth etc, it's currently based round google map point and click type stuff... If you're truly interested in all this stuff I have a lot of useless 2.4Ghz facts in my brain left over from when I was playing with it in 2002... -- Best regards, Duane http://www.cacert.org - Free Security Certificates http://www.nodedb.com - Think globally, network locally http://www.sydneywireless.com - Telecommunications Freedom http://e164.org - Because e164.arpa is a tax on VoIP "In the long run the pessimist may be proved right, but the optimist has a better time on the trip."
