[amsat-bb] Re: NIWAKA detected in VT on 5.84 GHz!

Mark L. Hammond marklhammond at gmail.com
Sat Nov 10 05:18:47 PST 2012


Congrats, Mike!  That's a nice result.

Do you have details of your downconverter/receive/antenna system posted online?

73,

Mark N8MH 

At 08:03 AM 11/10/2012 -0500, Mike Seguin N1JEZ wrote:
>Hi Takushi,
>
>Success! I was able to detect NIWAKA. It was lower in frequency that I expected, but with the Funcube, easy to spot.
>
>The Doppler was huge! and I was moving the dish almost continuous to try and keep up. I'll edit the I&Q RF file and post it so folks can play it back for themselves.
>
>Two quick screen shots. In the first shot, you can see the signal on the left side Doppler shifting down. In the second shot, a close up of one data burst with Doppler - about 3 secs or so...
>
>http://users.burlingtontelecom.net/~n1jez@burlingtontelecom.net/images/NIWAKA_1.jpg
>http://users.burlingtontelecom.net/~n1jez@burlingtontelecom.net/images/NIWAKA_2.jpg
>
>The 5.84 GHz transmitter seemed to come on very close to the set time. First detection at 12:24:21 UTC.
>
>More later.
>
>73,
>Mike, N1JEZ
>AMSAT 29649
>"A closed mouth gathers no feet"
>
>
>----- Original Message ----- From: "Mike Seguin N1JEZ" <n1jez at burlingtontelecom.net>
>Subject: [amsat-bb] Re: 5.8GHz transmission from NIWAKA
>
>
>>Hi Takushi,
>>
>>Excellent!  I'm set and waiting for NIWAKA to come up over the horizon in about an hour.
>>
>>73,
>>Mike, N1JEZ
>>AMSAT 29649
>>"A closed mouth gathers no feet"
>>
>>----- Original Message ----- From: <tanaka at fit.ac.jp>
>>Subject: Re: [amsat-bb] 5.8GHz transmission from NIWAKA
>>
>>
>>>Dear Mike,
>>>
>>>We have set the delay command successfully.
>>>NIWAKA will send the 5.84GHz at 12:24:30 on 10th Nov. (UTC)
>>>There may be +,-,30 sec error.
>>>Please watch!
>>>Thank you.
>>>
>>>Best 73
>>>de Takushi, JA6AVG
>>>
>>>
>>>
>>>----- Original Message -----
>>>>Hi Takushi,
>>>>
>>>>I loaded the latest keps today and the pass times are confirmed.
>>>Looking
>>>>forward to hearing NIWAKA!
>>>>
>>>>I will be recording the pass using a FunCube Dongle in I & Q RF mode,
>>>so
>>>>I'll have ~ 80 kHz of bandwidth. If I'm able to detect the signal on
>>>10 Nov,
>>>>I can try an RTL SDR receiver on 11 Nov that can receive a much wider
>>>>bandwidth. I use HDSDR with both SDR receivers.
>>>>
>>>>I will be setting up portable in a nearby parking lot so I have an
>>>>unobstructed view to the satellite. I see the Doppler will be quite
>>>large on
>>>>both days (~ 125 kHz). I use the original NOVA program on my laptop in
>>>the
>>>>field which calculates Doppler for me.
>>>>
>>>>Let's hope for success and thanks for coordinating this test.
>>>>
>>>>73,
>>>>Mike, N1JEZ
>>>>AMSAT 29649
>>>>"A closed mouth gathers no feet"
>>>>
>>>>----- Original Message ----- From: <tanaka at fit.ac.jp>
>>>>Subject: Re: [amsat-bb] 5.8GHz transmission from NIWAKA
>>>>
>>>>
>>>>> Dear Mike,
>>>>>
>>>>> We found the south paths with enough elevation in your suggestions.
>>>>> We plan the following times which start 5.8GHz transmission.
>>>>> The signal continues around 2 min.
>>>>> (1) at 12:24:30 on 10th Nov. (UTC)
>>>>> (2) at 11:32:30 on 11th Nov. (UTC)
>>>>> According to our calculating orbit software,
>>>>> the time is little bit delayed.
>>>>> Please confirm with the latest TLE.
>>>>> Thank you.
>>>>>
>>>>> 73
>>>>> Takushi, JA6AVG
>>
>>
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>
>
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