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

[Nico Janssen]

Scott,

That signal was the A-DCS service downlink on 465.9875 MHz from Metop-A
(object 29499, 2006-044A).

See also: http://www.wmo-sat.info/oscar/satellites/view/306

73,
Nico PA0DLO


On 12-02-16 03:32, Scott wrote:
> 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
> Korea.
>
> 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
> automatically.
>
> 73!
>
> -Scott,  K4KDR
> Montpelier, VA  USA
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