I was not on this particular pass, but I have heard these noises before and
do believe it to be L band radar interference.
FWIW, I was on the pass with Ron. I'll confirm his observations, although
I can't explain them ;) On some of the uplinks (but not all!) it sounded
like the 70cm "radar" noise, sort of. Jeff KB2M even commented the same.
Anyhow, we'll have more opportunities with future L/v sessions on AO-92
and can see if it happens again...
Mark N8MH
At 11:18 PM 12/23/2018 -0600, Jerry Buxton wrote:
Hi Ron, The downlink is the same radio as the U/v, so from that
perspective there is no particular reason that the L/v transmit signal
would be different. The L/v uplink passes through a downconverter with an
output of the same U frequency as the U/v uplink, directly into the
receiver. If there was any distortion to the L/v signal it would likely
occur in the downconverter path, but I haven't heard any other reports of
problems. The first thing that comes to mind for rapid fading is satellite
spin, I do not have any telemetry in front of me but if you check that out
on FoxTelem or the website to see if it is spinning faster than last week,
that might be a contributor. Noise then, if the satellite downconverter is
working correctly, is probably on the uplink signals and may be greater
than normal with the rapid fading. Jerry Buxton, NØJY On 12/23/2018 19:46,
Ronald G. Parsons wrote: > Last night AO-92 L/v downlink seemed at times
unusually noisy and distorted with rapid fading. Other I talked to on other
sats and one ham in ZL land also mentioned it. I have not noticed this on
AO-92 U/v, at least to this extent. My imagination or fact? > > Ron W5RKN >
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_______________________________________________ Sent via
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Paul Stoetzer