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Re: Pin point the UO-14 jammer.



Once we get 4 or 5 AOS/LOS times and dates I'll run the numbers and do the
plots. It'll be an interesting exercise, ... so everyone send them in to me.
A mix of n-s and s-n passes would help as that would lessen the effect of
surface features like mountains etc.

Cheers
Paul

----- Original Message -----
From: "Tom Blubaugh (N7HXP)" <mjrtom@home.com>
To: "Paul Willmott" <pwillmott@northrock.bm>; <amsat-bb@AMSAT.Org>; "Vince
Fiscus, KB7ADL" <vlfiscus@mcn.net>
Sent: Saturday, July 28, 2001 3:08 PM
Subject: Re: [amsat-bb] 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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