[AMRadio] frequency sweeper

Paul Christensen w9ac at arrl.net
Thu Jan 21 13:06:51 EST 2010

For those of you with Google Earth, the ROTHR transmitter Texas site can be 
seen here:


And the companion receive site:


Each ROTHR transmitter site has a companion receive site located nearby. 
Presumably the receive sites are used to monitor the alternate transmit 
sites with data gathered and computed across all three receivers to display 
probabilities of illicit narcotics activity (and anything else DHS does with 
the information).

By the way, the sweep intervals today are at 12 minutes.  If you're in the 
Southeast US, listen to a clear spot on the 40m CW potion at these times:

1:13:00 PM Site 1
1:13:20 PM  Site 2

1:25:00 PM Site 1
1:25:20 PM Site 2

1:37:00 PM Site 1
1:37:20 PM Site 2

1:49:00 PM Site 1
1:49:20 PM Site 2

All times ET.  Site 1 is very strong here today, Site 2 is weak.  I cannot 
hear Site 3 today.

Paul, W9AC

Paul, W9AC

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