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Fringe Reception General
Loss of signal due to rain
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<blockquote data-quote="Terryl" data-source="post: 1087427" data-attributes="member: 369937"><p>The strongest transponders will have a better chance punching through the tons of water vapor in the rain cloud's, most satellite transponders are rated from 20 to 120 watts ERP, if you do a path loss calculation with the distance being 22,500 miles (35,786 kilometers) to a 1 meter dish, you get an estimated loss of over 120 to 140 dBm, it also has to do as to where your dish is in the footprint of the satellite your looking at.</p><p></p><p>satbeams.com has a footprint lookup by satellite.</p><p></p><p>The only proven fix for Ku band rain fade is a bigger dish, some have tried rain shields on the LNB, or car wax on the dish, or other type of gimmicks but it wont help if the signals coming down from the satellite have to go through 20,000 feet of heavy rain or heavy water vapor. </p><p></p><p>The signal hitting your dish is about as weak as looking at candle at 20 miles away, very very weak, in the picovolt range, look at some of the local CATV company's, you will see some very big dishes around,(if they haven't switched to fiber) some are for "C" band, but others are for any Ku band feeds.</p></blockquote><p></p>
[QUOTE="Terryl, post: 1087427, member: 369937"] The strongest transponders will have a better chance punching through the tons of water vapor in the rain cloud's, most satellite transponders are rated from 20 to 120 watts ERP, if you do a path loss calculation with the distance being 22,500 miles (35,786 kilometers) to a 1 meter dish, you get an estimated loss of over 120 to 140 dBm, it also has to do as to where your dish is in the footprint of the satellite your looking at. satbeams.com has a footprint lookup by satellite. The only proven fix for Ku band rain fade is a bigger dish, some have tried rain shields on the LNB, or car wax on the dish, or other type of gimmicks but it wont help if the signals coming down from the satellite have to go through 20,000 feet of heavy rain or heavy water vapor. The signal hitting your dish is about as weak as looking at candle at 20 miles away, very very weak, in the picovolt range, look at some of the local CATV company's, you will see some very big dishes around,(if they haven't switched to fiber) some are for "C" band, but others are for any Ku band feeds. [/QUOTE]
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Fringe Reception General
Loss of signal due to rain
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