[aprssig] M0XER-4 balloon approaching Greenland?

Steve steve at daniels270.eclipse.co.uk
Thu Jul 31 20:05:04 EDT 2014

A station in Greenland recorded the audio as did not have any way to decode
APRS, it was transmitted on 2M. it was sent to DL7AD for decoding and

We are not allowed to transmit from the air as radio amateurs in the UK but
we can use an unlicenced part of 70cm but limited to 10mW, it works well.


Leo M0XER used a APRS VHF map of the world I created, to frequency switch as
the balloon traversed the world. So other than Receiving it going out and
coming in, I had a very small part.

Also the balloon sent data it had stored when out of range so it did jump
around a little

Updates to the map are of course welcome
http://aprsisce.wikidot.com/doc:frequenciesn it’s a copyright free map, feel
free to use, and contact me to update


Steve G6UIM



From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Samúel Úlfr Þór Guðjónsson
Sent: 30 July 2014 19:56
To: TAPR APRS Mailing List
Cc: Steve Noskowicz
Subject: Re: [aprssig] M0XER-4 balloon approaching Greenland?


DL7AD is injecting the packets to the APRS-IS from an audio file recorded at
a station in Greenland who was listening on 70cm.

A bit confusing I guess, but no magic going on.



73 de TF2SUT - Samúel


On 30 July 2014 12:24, Gerhard.F5VAG <f5vag.eu at gmail.com> wrote:


It seems the balloon sends telemetry in parallel on 70cm and on the regional
APRS frequencies.


I don't know any further details.

Concerning the mails in the Spam folder: This happens frequently if the
mails were sent from Yahoo and AOL accounts.

73 de Gerhard, F5VAG


On Wed, Jul 30, 2014 at 12:21 PM, Steve Noskowicz <noskosteve at yahoo.com>


  I do look at aprs.fi, but do not know enough to fully understand the
packets.  However, I did wonder why a DL7 would be able to report it and see
no stations on Greenland, so I should have questioned that position right
off.   I do see that the DL7 packet has the WIDE2-1 path, where the others
have none.  


Do you understand how Leo's balloon data gets to both the SpaceNear system
and the APRS-IS?  This is very confusing. 

   Looking at Leo Bodnar, M0XER's website, there is no information on those
last two payloads (-3 & -4).

The earlier balloon payloads are all so amall that they could only have the
440 50 baud tracker for the spacenear system and the spacenear map shows no
receivers in Canada.   

   However, for the valid packets earlier, I could see on aprs.fi that
Heikki's software shows that APRS digis had received the packets. Can you
explain how this works?


It will be a few more days until we will know if either one is still
floating.  I was watching the projected paths on the spacenear system jump
all around northern Canada and the Greenland area. 


I watched  the two K6RPT trans-Atlantic balloons and captured the tracks and
put together a presentation for my club.  The ham who took videos of the
launch sent them to mee and I edited them for the clup.  I recall that a ham
also added some invalid packets on one of those flights and did not respont
to questions.  I'll add Leo's balloons to my presentation.



I get none of my tapr aprs sig messages back, not even in my spam folder. .
I sent that last one (and this) to both you and the sig.  You are the second
person who said my messages apear in their spam folder.   Very strange.
Perhaps I need to look at my account in the TAPR system.


73, Steve, K9DCI



From: Gerhard.F5VAG <f5vag.eu at gmail.com>
To: Steve Noskowicz <noskosteve at yahoo.com> 
Sent: Tuesday, July 29, 2014 11:30 PM
Subject: Re: [aprssig] M0XER-4 balloon approaching Greenland!


Looking at the raw packets I'm led to believe someone played with M0XER-4's
http://aprs.fi/?c=raw <http://aprs.fi/?c=raw&call=M0XER-4> &call=M0XER-4

73 de Gerhard, F5VAG

P.S.: Your messages arrive very often in the Spam folder of my Gmail



On Wed, Jul 30, 2014 at 6:04 AM, Steve Noskowicz <noskosteve at yahoo.com>





73, Steve, K9DCI


I don't seem to be passing through the TAPR Reflector.



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