[450] Fwd: Mystery QRM (2)

Sun May 19 19:01:33 EDT 2013

cool, glad it's resolved and that we figured it out

On Sun, May 19, 2013 at 5:47 PM, Bob <n1ujs at toast.net> wrote:

> The latest:
>
> ---------- Forwarded message ----------
> From: Kristina A. Lynch <Kristina.A.Lynch at dartmouth.edu>
> Date: Sun, May 19, 2013 at 5:28 PM
> Subject: RE: Mystery QRM (2)
> To: Max Fagin <maxfagin at gmail.com>, "David G. McGaw" <
> David.G.McGaw at dartmouth.edu>
> Cc: "Eric W. Hansen" <Eric.W.Hansen at dartmouth.edu>, "Yorke J. Brown" <
> Yorke.J.Brown at dartmouth.edu>, "Maxwell H. Fagin" <
> Maxwell.H.Fagin at dartmouth.edu>, Bob <n1ujs at toast.net>, "Todd S. Anderson"
> <Todd.S.Anderson.14 at dartmouth.edu>
>
>
>
> Dave, Eric-
> Please relay my apologies to the group who were disturbed by our
> transmissions.
> We use the ham radio as our backup telemetry system on our research
> balloons,
> for about 2 hours once or twice a year;  we have been doing this for
> approximately five years.  It is possible that Amanda Slagle (who
> graduated
> last year) was in the habit of telling Dave McGaw ahead of time?  And this
> protocol got slipped since she left.  We can certainly be sure to let Dave
> know
> in the future, if that would be helpful.  Also, now that our DNT system is
> working,
> we could significantly drop the data rate on the backup ham transmissions
> if that
> would be helpful.  Please let me know.
> Regards
> Kristina Lynch
> Dartmouth Physics/GreenCube Faculty Mentor
> www.dartmouth.edu/~aurora
>
>  ------------------------------
> *From:* Max Fagin [maxfagin at gmail.com]
> *Sent:* Sunday, May 19, 2013 3:02 PM
> *To:* David G. McGaw
> *Cc:* Eric W. Hansen; Yorke J. Brown; Maxwell H. Fagin; Bob; Todd S.
> Anderson; Kristina A. Lynch
>
> *Subject:* Re: Mystery QRM (2)
>
>   The interfering transmission on 144.440 MHz was coming from the
> GreenCube 6 balloon payload which was in the air over Mt. Washington from
> 10:30-12:30 this morning.  The flight is over, and there will be no more
> transmissions on that frequency today. Todd and Kristina (cc'ed) are the
> lead investigators on the payload, and should be contacted with questions
> about the transmissions.
>
>  -Max
>
> On May 19, 2013, at 2:21 PM, "David G. McGaw" <david.g.mcgaw at dartmouth.edu>
> wrote:
>
>  Hi Eric,
>
> It is possible that Yorke and Max have a packet transmitter on their
> research balloons.  If so, they need to check frequencies beforehand AND
> have to contact you as the trustee of W1ET or me as the officer of record
> before using the callsign.
>
> Yorke, Max?
>
> David N1HAC
>
>
> On 5/19/13 1:32 PM, Eric W. Hansen wrote:
>
> Interesting hypothesis.  Any ideas?
>
>  Eric
>
>   From: Bob <n1ujs at toast.net>
> Date: Sunday, May 19, 2013 1:18 PM
> To: Eric Hansen <eric.w.hansen at dartmouth.edu>
> Subject: Re: Packet transmissions
>
>   Some have suggested it might be a weather balloon?  In any case, it
> ceased transmitting about an hour ago.
>
>  Thanks for looking into it.
>
>  Bob N1UJS
>
>
> On Sun, May 19, 2013 at 1:08 PM, Eric W. Hansen <
> Eric.W.Hansen at dartmouth.edu> wrote:
>
>>  That is really strange.  Our repeater operates on 444.950, and that's
>> the only source of transmission I am aware of.  We haven't operated packet
>> for years.  I will forward your message to some other people who can help
>> track this down and get back to you if I find anything out.
>>
>> Thanks for the heads up.
>>
>>  Best,
>> Eric Hansen
>>
>>   From: Bob <n1ujs at toast.net>
>> Date: Sunday, May 19, 2013 11:25 AM
>> To: Eric Hansen <eric.w.hansen at dartmouth.edu>, ham radio club <
>> ham.radio.club at dartmouth.edu>
>> Cc: 450 <450 at lists.vhfwiki.com>
>> Subject: Packet transmissions
>>
>>      To whomever it may concern,
>>
>>  There are strong packet transmissions being sent on 144.440 that are
>> identified by the W1ET call sign.  They are causing a bit of a disturbance
>> to a large group of operators on 144.450.  I imagine this is unintended, as
>> the last time something like this happened it turned out the transmissions
>> were intended for a frequency 600 khz higher, but the operator had
>> inadvertently pushed the "shift button".
>>  Could you please check your station and see if it is responsible?
>>
>>  Here is a copy of the transmission:
>>
>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150425h4403.66N/07114.**84WO-19C
>> Good fix 5 Seconds*
>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150430h4403.55N/07114.**74WO/A=041788-20C
>> Good fix 5 Seconds*
>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150436h4403.44N/07114.**66WO/A=041928-20C
>> Good fix 5 Seconds*
>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150448h4403.20N/07114.**47WO/A=042230-20C
>> Good fix 5 Seconds*
>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150454h4403.08N/07114.**40WO/A=042363-20C
>> Good fix 5 Seconds*
>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150500h4402.96N/07114.**34WO/A=042468-20C
>> Good fix 5 Seconds*
>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150506h4402.84N/07114.**28WO-20C
>> Good fix 5 Seconds*
>> *W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150512h4402.76N/07114.**22WO-20C
>> Good fix 5 Seconds*
>>
>>  It has been suggested that the actual transmission bothering us may be a
>> "retransmission" of your signal by an "unknown station", however the only
>> call sign in the transmission is yours.
>>  The signal I am receiving is quite strong (40-60 over s-9 to a phased
>> pair of 10 elements) in the direction of roughly 20 degrees from my
>> location in Newtown, CT, and appears to be horizontally polarized.
>>
>>  Thank you for any assistance you can provide us in this matter.
>>
>>  Bob N1UJS
>>
>>
>
>
>
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