Tropospheric Ducting
Posted: Sat Apr 09, 2005 9:12 pm
Over the past few weeks I've experienced intersting reception issue since I re created my antenna set-up outside as opposed to in the attic.
Specifically, here in Tampa/St. Pete, I've received DT stations from Ft. Myers (100 miles) and Orlando/Clermont (over 110 miles in one case). Being curious, I searched the internet and found this web site
http://www.iprimus.ca/~hepburnw/tropo_wam.html
which actually seeks to predict the phenomenon. Basically, weather conditions can beat the "curvature of the earth" problem in receiving distant stations. since my antennas (two on a combiner) are only 20 ft off the ground and NOT long range type antennas, I was curious if anyone else had experienced this. the stations scan in for about 30 minutes to an hour and a half and then are gone. I've gotten signal strength readings of as high as 77% from Ft. Myers.
Anybody else seen this sort of thing?
Robert
Specifically, here in Tampa/St. Pete, I've received DT stations from Ft. Myers (100 miles) and Orlando/Clermont (over 110 miles in one case). Being curious, I searched the internet and found this web site
http://www.iprimus.ca/~hepburnw/tropo_wam.html
which actually seeks to predict the phenomenon. Basically, weather conditions can beat the "curvature of the earth" problem in receiving distant stations. since my antennas (two on a combiner) are only 20 ft off the ground and NOT long range type antennas, I was curious if anyone else had experienced this. the stations scan in for about 30 minutes to an hour and a half and then are gone. I've gotten signal strength readings of as high as 77% from Ft. Myers.
Anybody else seen this sort of thing?
Robert