ALE doesn't sweep it sends on particular (selected channels) for a
given net in selected from a predetermined list and in conjunction
with predictions from a propagation program.
You can hear typical ALE here (I think there is more than one type).
Sounds like an alien ray gun!
<http://www.kb9ukd.com/digital/ale.wav>
from this collection
<http://www.kb9ukd.com/digital/>
On Dec 6, 2007, at 5:13 PM, Stuart Rohre wrote:
I wonder if sweeps are also used by Automatic Link Establishment
radios?
There is some work going on with them near the ham bands,
especially Air
Force MARS. (Army MARS has just discontinued their ALE program).
Paul, W9AC said:
Perhaps my location is unusually sensitive to the sweeps,
I suspect it must be ground wave range for you. There's no NVIS on
40. Or perhaps you are just right for skip from the source right now.
but I am a bit
astonished that this deliberate interference is allowed to persist
around
the clock, albeit in short bursts. No station identification seems
to be
required either. Pretty amazing, but government organizations and
the
military seems to qualify for special exemptions from "good operating
practices."
How would you ID a sweep? Really fast CW :-)
For sounders that's just the way it is.
--
Kevin Purcell
kevinpurcell@pobox.com
|