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144 MHz satellite uplinks



Tony Langdon wrote, about 144 MHz satellite uplinks in Australia:

		Just better hope that it doesn't pick up too much rubbish from Asian 
		cordless phones.  Those things give the LEOs a real hammering when they 
		pass to the north of us. :(


Wayne replies:

Asian cordless phones are less of a threat to high-orbit satellites because the satellite requires several hundred watts of ERP to get a decent uplink signal (except near perigee).  It's definitely a problem for LEO satellites where 100W or less can cause significant QRM.

Sad to say, but I guess that's a good reason not to make satellite uplinks TOO sensitive.

Wayne Estes W9AE
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