You/re right of course, it's 1 ft/nanosecond. Don't know what I was
thinking. I was also focusing on CW DQRM, since that is 99% of what I
operate, and since carriers and CW jamming havw been endemic on the
Navassa
dxpedition's top band and 80m operations. I agree that for SSB
interference,
the concept would be harder to implement since there would be no sharply
defined turn-on time for the interference at the receiving stations.
There is no sharply defined turn on time for CW, either. These people are
not transmitting multi-kilowatt LORAN pulses that are 100 kHz bandwidth
through highly efficient antenna systems.
What is being proposed is not that much different than LORAN, except now the
signal level is in the noise and does not have a well-defined transition
point in any mode.
The S/N at each site would determine when any given site detects a change.
I'm afraid anything affected by strength is a waste of time. We'd be doing
well to get within 200 miles.
The sites might be able to look at signal phase, but it seems to me
directional detection at each site would be far easier, more accurate, and
more reliable. From here looking at phase differences between antennas using
an NCC-1, I can get within about 2-3 degrees compass heading. The
calibration process is tedious.
I'm sure I could do that or better with a specialized small antenna system
that would remain calibrated for a very long time.
73 Tom
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|