<div dir="ltr">The latest:<br><div><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Kristina A. Lynch</b> <span dir="ltr"><<a href="mailto:Kristina.A.Lynch@dartmouth.edu">Kristina.A.Lynch@dartmouth.edu</a>></span><br>
Date: Sun, May 19, 2013 at 5:28 PM<br>Subject: RE: Mystery QRM (2)<br>To: Max Fagin <<a href="mailto:maxfagin@gmail.com">maxfagin@gmail.com</a>>, "David G. McGaw" <<a href="mailto:David.G.McGaw@dartmouth.edu">David.G.McGaw@dartmouth.edu</a>><br>
Cc: "Eric W. Hansen" <<a href="mailto:Eric.W.Hansen@dartmouth.edu">Eric.W.Hansen@dartmouth.edu</a>>, "Yorke J. Brown" <<a href="mailto:Yorke.J.Brown@dartmouth.edu">Yorke.J.Brown@dartmouth.edu</a>>, "Maxwell H. Fagin" <<a href="mailto:Maxwell.H.Fagin@dartmouth.edu">Maxwell.H.Fagin@dartmouth.edu</a>>, Bob <<a href="mailto:n1ujs@toast.net">n1ujs@toast.net</a>>, "Todd S. Anderson" <<a href="mailto:Todd.S.Anderson.14@dartmouth.edu">Todd.S.Anderson.14@dartmouth.edu</a>><br>
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Dave, Eric-<br>
Please relay my apologies to the group who were disturbed by our transmissions.<br>
We use the ham radio as our backup telemetry system on our research balloons,<br>
for about 2 hours once or twice a year; we have been doing this for <br>
approximately five years. It is possible that Amanda Slagle (who graduated <br>
last year) was in the habit of telling Dave McGaw ahead of time? And this<br>
protocol got slipped since she left. We can certainly be sure to let Dave know <br>
in the future, if that would be helpful. Also, now that our DNT system is working,<br>
we could significantly drop the data rate on the backup ham transmissions if that<br>
would be helpful. Please let me know.<br>
Regards<br>
Kristina Lynch<br>
Dartmouth Physics/GreenCube Faculty Mentor<br>
<a href="http://www.dartmouth.edu/~aurora" target="_blank">www.dartmouth.edu/~aurora</a><br>
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<div style="direction:ltr"><font color="#000000" face="Tahoma"><b>From:</b> Max Fagin [<a href="mailto:maxfagin@gmail.com" target="_blank">maxfagin@gmail.com</a>]<br>
<b>Sent:</b> Sunday, May 19, 2013 3:02 PM<br>
<b>To:</b> David G. McGaw<br>
<b>Cc:</b> Eric W. Hansen; Yorke J. Brown; Maxwell H. Fagin; Bob; Todd S. Anderson; Kristina A. Lynch<br>
<b>Subject:</b> Re: Mystery QRM (2)<br>
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<div>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.</div>
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<div>-Max</div>
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On May 19, 2013, at 2:21 PM, "David G. McGaw" <<a href="mailto:david.g.mcgaw@dartmouth.edu" target="_blank">david.g.mcgaw@dartmouth.edu</a>> wrote:<br>
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<div>Hi Eric,<br>
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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.<br>
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Yorke, Max?<br>
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David N1HAC<br>
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<div>On 5/19/13 1:32 PM, Eric W. Hansen wrote:<br>
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<div>Interesting hypothesis. Any ideas?</div>
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<div>Eric</div>
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<span style="font-weight:bold">From: </span>Bob <<a href="mailto:n1ujs@toast.net" target="_blank">n1ujs@toast.net</a>><br>
<span style="font-weight:bold">Date: </span>Sunday, May 19, 2013 1:18 PM<br>
<span style="font-weight:bold">To: </span>Eric Hansen <<a href="mailto:eric.w.hansen@dartmouth.edu" target="_blank">eric.w.hansen@dartmouth.edu</a>><br>
<span style="font-weight:bold">Subject: </span>Re: Packet transmissions<br>
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<div>Some have suggested it might be a weather balloon? In any case, it ceased transmitting about an hour ago.<br>
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<div>Thanks for looking into it.<br>
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<div>Bob N1UJS<br>
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<div class="gmail_quote">On Sun, May 19, 2013 at 1:08 PM, Eric W. Hansen <span dir="ltr">
<<a href="mailto:Eric.W.Hansen@dartmouth.edu" target="_blank">Eric.W.Hansen@dartmouth.edu</a>></span> wrote:<br>
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<div>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.</div>
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<div>Thanks for the heads up.</div>
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<div>Best,</div>
<div>Eric Hansen</div>
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<span style="font-weight:bold">From: </span>Bob <<a href="mailto:n1ujs@toast.net" target="_blank">n1ujs@toast.net</a>><br>
<span style="font-weight:bold">Date: </span>Sunday, May 19, 2013 11:25 AM<br>
<span style="font-weight:bold">To: </span>Eric Hansen <<a href="mailto:eric.w.hansen@dartmouth.edu" target="_blank">eric.w.hansen@dartmouth.edu</a>>, ham radio club <<a href="mailto:ham.radio.club@dartmouth.edu" target="_blank">ham.radio.club@dartmouth.edu</a>><br>
<span style="font-weight:bold">Cc: </span>450 <<a href="mailto:450@lists.vhfwiki.com" target="_blank">450@lists.vhfwiki.com</a>><br>
<span style="font-weight:bold">Subject: </span>Packet transmissions<br>
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<div>To whomever it may concern,<br>
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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".<br>
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Could you please check your station and see if it is responsible?<br>
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<div>Here is a copy of the transmission:<br>
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<div><b>W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150425h4403.66N/07114.</b><b>84WO-19C Good fix 5 Seconds</b></div>
<div><b>W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150430h4403.55N/07114.</b><b>74WO/A=041788-20C Good fix 5 Seconds</b></div>
<div><b>W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150436h4403.44N/07114.</b><b>66WO/A=041928-20C Good fix 5 Seconds</b></div>
<div><b>W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150448h4403.20N/07114.</b><b>47WO/A=042230-20C Good fix 5 Seconds</b></div>
<div><b>W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150454h4403.08N/07114.</b><b>40WO/A=042363-20C Good fix 5 Seconds</b></div>
<div><b>W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150500h4402.96N/07114.</b><b>34WO/A=042468-20C Good fix 5 Seconds</b></div>
<div><b>W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150506h4402.84N/07114.</b><b>28WO-20C Good fix 5 Seconds</b></div>
<div><b>W1ET*>WIDE1-1>WIDE2-1>APOT21 <UI>:/150512h4402.76N/07114.</b><b>22WO-20C Good fix 5 Seconds</b></div>
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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.<br>
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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.<br>
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Thank you for any assistance you can provide us in this matter.<br>
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Bob N1UJS<br>
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