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

Scott scott23192 at gmail.com
Fri Feb 12 14:24:32 UTC 2016


Thank God for peer review.  Sorry for the false alarm, but I guess if I had
not put it out there, I would have always wondered if I had found something


On Fri, Feb 12, 2016 at 5:51 AM, Nico Janssen <hamsat at xs4all.nl> wrote:

> 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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