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[aprssig] KC2TUA/KC2UFG Ballon Down?

Greg Clark K7RKT at bigredbee.com
Mon Mar 23 00:16:58 UTC 2009


Interesting how the transmit rate increased after they sent the
cut-down message.  I'll be very interested in hearing how they
implemented that as the BeeLine GPS itself only has one beacon rate.
Perhaps they had an external microcontroller modify the device
parameters on the fly?

-- Greg K7RKT

On 3/22/09, Steve Noskowicz <noskosteve at yahoo.com> wrote:
>
>
>
>  Looks like it's down, just a few minutes ago.  All-in-all, it's a nice track.  AND they have quite a ride to pick it up...
>
>  http://www.findu.com/cgi-bin/track.cgi?call=KC2TUA-8&degree=16
>
>
>  -- 73, Steve, K9DCI
>  Manage Radio Memories with an Excel Spreadsheet !
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>  You know that sea of entropy we were going to drown in?  Well, upon closer examination, it turned out to be ignorance.  S. Noskowicz 1987
>
>
>  --- On Sun, 3/22/09, Mike Miller <mike.kc9doa at sbcglobal.net> wrote:
>
>  > From: Mike Miller <mike.kc9doa at sbcglobal.net>
>  > Subject: Re: [aprssig] KC2TUA/KC2UFG Ballon QRM
>  > To: "TAPR APRS Mailing List" <aprssig at tapr.org>
>  > Date: Sunday, March 22, 2009, 4:17 PM
>  > I'm sure the interference to your
>  > repeater was unintentional and
>  > just a poor choice of frequency. Both the ARRL and the
>  > Upper New
>  > York Repeater Council band plans show 146.400 as simplex.
>  > The
>  > ARRL does note that it may be used as a repeater input in
>  > some
>  > areas. If the repeater had a tone protected input, you
>  > probably
>  > would have never known they were there.
>  >
>  > Mike kc9doa
>  >
>  > On 22 Mar 2009 at 13:12, Ron wrote:
>  >
>  > >
>  > > OK the balloon is out of my range now and approaching
>  > Nfld.
>  > >
>  > > I respectfully disagree that the effect of these
>  > transmissions
>  > > was either minimal or short-lived.
>  > >
>  > > From 30,000 ft the APRS signal was being heard by
>  > nodes over 300
>  > > miles away, which could be about 25
>  > digipeaters...although some
>  > > would hear their neighbors transmission and not
>  > repeat. Not to
>  > > mention every home station that has WIDE1-1 set for
>  > digipeating.
>  > >
>  > > This has about 10 times more effect than a mobile
>  > driving by at
>  > > 60mhp.
>  > >
>  > > In this case the duration of the pass was also
>  > significant. From
>  > > approx 08:20z to 19:30z it was heard in my area.
>  > >
>  > > While the effect to our APRS network was not severe,
>  > the 147.000-
>  > > repeater took a significant beating for about 10 hours
>  > thanks to
>  > > KC2UFG transmitting on an inappropriate frequency.
>  > >
>  > >
>  > > I am very disappointed that people planning such
>  > extended balloon
>  > > expeditions do not take these things into
>  > consideration.
>  > >
>  > > It has been discussed on this group a number of times
>  > and I
>  > > though there was an understanding of proper beacon
>  > rates and
>  > > paths. Especially the consideration of such rates
>  > while aloft
>  > > (>1000ft), eg: direct paths only and reasonable
>  > beacon rates
>  > > based on coverage/average speed.
>  > >
>  > > 73,
>  > > VE1AIC Ron
>  >
>  >
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