Jeremy, Do you have any numbers on absorption? How about propagation speed. Could a cloud of humid air surrounding a tree act as a microwave lens and refract the beam away from the line-of-sight. This would be analogous to the twinkling of star light due to atmospheric disturbances.
Regards, Loren -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Jeremy Levy Sent: Tuesday, June 17, 2003 12:29 PM To: Casey Halverson; Loren Zemenick; Wireless Subject: RE: [BAWUG] Why might a 5 mile link degrade during hot weather? Don't know about heat, however humidity could have an effect. --- Casey Halverson <[EMAIL PROTECTED]> wrote: > How high are each of your antennas? Is there an > altitude difference between the two or are they > level? > > > > -----Original Message----- > From: Loren Zemenick > [mailto:[EMAIL PROTECTED] > Sent: Monday, June 16, 2003 8:17 AM > To: Wireless > Subject: [BAWUG] Why might a 5 mile link degrade > during hot weather? > > > I have a 5 mile 802.11b link that works fine until > air > temperatures exceed > around 85 F. Over a period of about an hour, the > percentage of > missed pings > grows from zero to 100 percent. Link endpoints are > Linksys > WAP11 (ver 2.6) > configured as a point-to-point bridge with 24 Dbi > horzontally polorized > antennas. The WAP11's and power supplies have been > cooled with > no effect. > Some trees are in the Frenel zone. The problem > happens weekdays and > weekends. With WAP11's I don't know of a way to > measure signal > strength or > quality. > > Does anyone have any suggestions as to what might be > causing > the outage or > how to troubleshoot the problem? > > Regards, > Loren Zemenick > > -- > general wireless list, a bawug thing > <http://www.bawug.org/> > [un]subscribe: > http://lists.bawug.org/mailman/listinfo/wireless > -- > general wireless list, a bawug thing > <http://www.bawug.org/> > [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
