David I. Emery wrote:
The transponders are 1090/1030 mhz and not 1350. 1350 is just
radar.
There are double pulses that I'm seeing, with variable timing between
the main pulse
and the sub-pulse. The other 1350Mhz radar is much further away from
me, but
perhaps the "sub pulses" I'm seeing are coming from the other radar
station, and
they're drifting in and out of phase with respect to one another. The
sub pulses
are weaker than the main pulses by quite a bit.
But Marcus's description of signals every 5 seconds sounds exactly
like radar and I bet if he has ID'd the right radar as the culprit he
can go visit it and watch it turning around at exactly the interburst
interval he sees. That might in fact be a good test if he cannot find a
better method of verifying that is his radar as various actual radars tend
to use different antenna RPMs.
I might also add that unless propagation is strictly line of sight
one needs more sophisticated path models to determine expected signal power.
-11 dbm sounds rather loud.
At 1350, the pulses are arriving 35-40dB out of the noise. But I agree
that a simplistic
line-of-sight propagation model isn't ideal. But even if this thing
were coming in at
-40dBm, that's still plenty-strong to screw me up!
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