[amsat-bb] Possible KMS-4 Radio Reception w/ video

Scott scott23192 at gmail.com
Fri Feb 12 02:32:54 UTC 2016

At approximately 0111 UTC 12-Feb-2016, I was monitoring a wide spectrum in
the area of 460 Mhz in hopes of seeing a signal with doppler movement that
might correspond to the TLE track of the KMS-4 satellite launched by North

A very strong signal appeared up near 465.985 and tracked as you would
expect.  Since the signal strength and doppler movement correlated nicely
to the track on Orbitron, I suppose there is a decent chance that I was
actually receiving KMS-4.

Naturally I forgot to record the IF until well through the pass, but I
don't really expect to be able to decode the signal anyway.  I'm not even
sure if there was anything but a carrier, to be honest.

On the outside chance that I did see anything on this pass, I was recording
the screen and have uploaded the video to YouTube.  Orbitron is very small
on the right side as I wanted to have as much area as possible to watch for
a signal in HDSDR.

The max elevation on the pass was 55 degrees.  Antenna was a fixed,
omni-directional QFH built for 432 Mhz.  The radio was the SDRPlay RSP.

If anyone would like to see what the signal looked & sounded like, the
video is at:  https://youtu.be/9JiEyUM-8U4  (please jump to the 4:40 mark
where the signal first appears)

Oh, and sorry about the manual tuning... not knowing the frequency
beforehand, I did not have the software setup to track the doppler


-Scott,  K4KDR
Montpelier, VA  USA

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