Re: Fwd: Re: Confirmed KMS-4 Radio Reception on UHF

From: Satcom via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 10 Feb 2016 07:20:56 +0000
Hi Scott.

There should be plenty of sample sound grabs from  Metop-A around for 
comparison.
I'll see what I can find.

Regards

John



On 10/02/2016 07:16, Scott Tilley via Seesat-l wrote:
> Hi All
>
> I'm not so sure after some further analysis.
>
> I suspect the signal I copied could be Metop-A, 29499 as I just copied
> it again at the predicted time for Metop-A during its pass around 11pm PDT.
>
> I would give my previous reports much suspicion based on this observation.
>
> Begin passes prediction from 18:13:59 2016.02.09 to 02:13:59 2016.02.10 PDT
> ______________________________________________________________________________________________________________________
>
> satellite______________|int. des.___|number|el._|sat.
> mag._|rise________________|set_________________|data age|pass___|
> METOP-A                 2006-044A     29499   22        6.5 19:31:03
> 2016.02.09  19:44:44 2016.02.09      0.3    13.7
> KMS 4                   2016-009A     41332   32          ? 19:35:12
> 2016.02.09  19:46:02 2016.02.09      0.1    10.8
> KMS 4                   2016-009A     41332   21          ? 21:08:54
> 2016.02.09  21:19:19 2016.02.09      0.2    10.4
> METOP-A                 2006-044A     29499   70        7.2 21:09:48
> 2016.02.09  21:25:14 2016.02.09      0.3    15.4
> METOP-A                 2006-044A     29499   11        8.7 22:52:41
> 2016.02.09  23:04:28 2016.02.09      0.4    11.8
> ______________________________________________________________________________________________________________________
>
>
> Regards,
> Scott
>
>
>
>
>
> On 2/9/2016 11:01 PM, Satcom via Seesat-l wrote:
>>
>>
>>
>>
>> From: Satcom <john_at_satcom.freeserve.co.uk>
>> To: Scott Tilley <sthed475_at_telus.net>
>>
>> If it helps , I played Scotts wav file through SDR sharp....the signal
>> id definitely there , and pretty strong.
>> Here is a grab from the visualisation.
>>
>> https://drive.google.com/file/d/0B4g1kKs0cR7ZNFlwenlyazBvYUE/view?usp=sharing.
>>
>>
>>
>> My guess.... Scott is spot on with his assumption that this is KMS-4
>>
>> Regards
>>
>> John
>>
>>
>>
>>
>> On 10/02/2016 05:35, Scott Tilley via Seesat-l wrote:
>>> Further to my last, I have copied a second pass with timings that
>>> closely match Spacetrack TLEs.
>>>
>>> The signal is weak and experiences deep fades with obvious modulation.
>>> Hear the recording below to form you're own opinion.
>>>
>>> The signal seems to have drifted up in overall frequency since last
>>> orbit.
>>>
>>> Here's a 75MB wav file of the entire pass that anyone can hear. I
>>> screwed up making a wideband recording due to unfamilaritity with the
>>> software but I hope it helps with the analysis.  It's just demodulated
>>> audio not the raw 190KHz bandwidth.  It starts off uninteresting but
>>> gets very loud with signal a few minutes in around (6-7 minutes) and
>>> near the end of the pass.  Best viewed with something that can visualize
>>> the signal.
>>>
>>> https://dl.dropboxusercontent.com/u/15916951/Record0_20160210_050859.wav
>>>
>>> Regards,
>>> Scott
>>>
>>> _______________________________________________
>>> Seesat-l mailing list
>>> http://mailman.satobs.org/mailman/listinfo/seesat-l
>>>
>>
>>
>>
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-- 
Best wishes

John

PP Support

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Received on Wed Feb 10 2016 - 01:21:29 UTC

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