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Re: Pin point the UO-14 jammer.



Hi Paul, Vince and everyone on the BB

    I was on UO-14 that night we had the jammer and I did hear the
jammers LOS time.
The jammers signal faded at day 7/27(UTC) at 4:43:45 (UTC), less than
a minute before my LOS that evening. I'm sure the station didn't unkey
because it was a slow 'uplink' fade(typical of LOS). But if the jammers location
had a high mountian range to the north of his location, then this locating
via the footprint method could be a little off.
At least now I see where the jammers possible location is along the south part
of the footprint line. I hope this helps in finding the dumb #^%&.

73 and have a nice weekend everyone
Tom / N7HXP
Tacoma CN87RG
mjrtom@home.com

----- Original Message ----- 
From: "Paul Willmott" <pwillmott@northrock.bm>
To: <amsat-bb@AMSAT.Org>; "Vince Fiscus, KB7ADL" <vlfiscus@mcn.net>
Cc: <brahn@voyager.net>
Sent: Saturday, July 28, 2001 9:39 AM
Subject: Re: [amsat-bb] Pin point the UO-14 jammer.


> The key will be to find his AOS and LOS.
> 
> If you guys send me the AOS and LOS times and dates on a number of sessions
> then I'll run the numbers for you.
> 
> I'm a bit outa the footprint here to take readings myself
> 
> Cheers
> Paul, VP9MU
> 
> ----- Original Message -----
> From: "Vince Fiscus, KB7ADL" <vlfiscus@mcn.net>
> To: <amsat-bb@AMSAT.Org>
> Cc: <brahn@voyager.net>
> Sent: Saturday, July 28, 2001 12:40 PM
> Subject: RE: [amsat-bb] Pin point the UO-14 jammer.
> 
> 
> >
> > Yes, there's lots of possibilities for this sort of thing. I've read in
> > DF'ing books about satellites that use similar methods to find downed
> > aircraft from the doppler shift of their ELT.  Unfortunately, UO-14 is an
> > FM bird and so the doppler shift of the jammers uplink can't be
> > determined.  This means we can only use the less accurate method I
> > mentioned earlier.
> >
> > 73, KB7ADL
> >
> > At 09:58 PM 7/27/01 -0400, <brahn@voyager.net> wrote:
> > >Many years ago (something on the order of 12 plus), Courtney Duncan,
> N5BF,
> > >shared a copy of some software an associate of his was working on called
> > >SATFOXHUNT.  SATFOXHUNT was exactly as the name implies--fox hunting the
> > >location of an unknown station using a known location of the satellite at
> an
> > >instance in time along with a measurement of the doppler shift of the
> fox.
> > >
> > >The software, while a challenge to use, produced some amazing results.  I
> > >was able to locate stations within 50 KM or so of their known location.
> > >Given today's computer processing power along with more advanced station
> > >automation a program similar to this should be able to nail things down
> much
> > >quicker with better accuracy.
> > >
> > >Like a lot of things at the time, I didn't have the time to experiment
> more
> > >with the software or work with Courtney on refinements.  Sigh....so much
> to
> > >do and so little time.
> > >
> > >Perhaps if Courtney is following the thread he can amplify a bit more on
> > >things.
> > >
> > >73 -- Bruce
> > >
> > >
> > >Bruce Rahn
> > >WB9ANQ
> > >brahn@voyager.net
> > >
> > >Wisdom has two parts:
> > >1.  having a lot to say; and
> > >2.  not saying it!
> > >
> > >
> > >-----Original Message-----
> > >From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> > >Behalf Of Vince Fiscus, KB7ADL
> > >Sent: Friday, July 27, 2001 11:14 AM
> > >To: amsat-bb@AMSAT.Org
> > >Subject: [amsat-bb] Pin point the UO-14 jammer.
> > >
> > >
> > >
> > >We can pin point the jammer on uo-14 using instant track.  What the idiot
> > >doesn't doesn't realize is that the longer he transmits during a pass the
> > >more we can locate him.  If he transmits horizon to horizon, his location
> > >should fall on a thin line. Monitoring a number of passes can make the
> line
> > >or football shape smaller.
> > >
> > >[stuff deleted]
> > >
> > >KB7ADL
> > >
> > >----
> > >Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > >To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> >
> > ----
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> >
> 
> ----
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