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Re: RE: Signal Report - AO-40



Hello All;
Firs my excuses to Maggie for nor replying to the mail copied to
my URL
1) we disconnected the computer, all radios in the shack not involved in the
listening
of "the beacon", disconnected al possible "RF generating" possibilities
- the signal maintained it's presence.
2) beams, 2 V/U 12,5 db antennas has been swung in different directions, we always
lost signals.
3) official LOS as per set #8 was 20.19 UTC, we lost signal +_ 15 mins later with
the beams in horizontal pos.
4) aprox 6 h 22 mins.  later, the signal is back, or still there with the beam almost
90 degs upwards and heading 315, frequency 435.587Mhz
5) my question is, is set #8 still ok, signal are now about 52

Sorry, I do not know what to say more.
regards
Nicolau - PP8DA
E-mail: nsallay@internext.com.br

----- Original Message -----
From: "Diggs, Steve" <Diggs@daugherty.com>
To: "'nsallay'" <nsallay@internext.com.br>
Cc: "'amsat-bb@amsat.org'" <amsat-bb@AMSAT.Org>; <ne1h@highrf.com>
Sent: Thursday, December 14, 2000 5:52 PM
Subject: [amsat-bb] RE: Signal Report - AO-40


> Two more things to do to further verify the source of the signal:
>
> 1. Disconnect the antenna. Does the sound go away? If not, it may be a local
> birdie as suggested on AMSAT-BB.
> 2. Point your antennas away from where your software is telling you to point
> it. Does the signal go away?
>
> If both of these tests agree, then it most likely ISN'T a birdie.
>
> Regards,
> Steve Diggs, W4EPI
>
> -----Original Message-----
> From: nsallay [mailto:nsallay@internext.com.br]
> Sent: 12/14/2000 4:01 PM
> To: Diggs, Steve
> Subject: Re: Signal Report - AO-40
>
>
> Hello Steve
> I am using set #8 and my position is
> Lat 3.4.36.7 S Lon 60.0.21.5W, 25 m above see level.I lost the signal with
> heavy Qsb
> around 20.25
> UTC on 435.457.5  Mhz
> regards
> Nicolau
>
> E-mail: nsallay@internext.com.br
> ----- Original Message -----
> From: "Diggs, Steve" <Diggs@daugherty.com>
> To: "'nsallay'" <nsallay@internext.com.br>
> Sent: Thursday, December 14, 2000 3:09 PM
> Subject: Signal Report - AO-40
>
>
> > Hello Nicolau,
> >
> > Thanks for your note. We are trying to verify the signal you reported here
> > in Atlanta, GA. Please advise which set of Keplerian Elements you are
> using.
> > Also, your latitude and longitude, and height above sea level would help.
> > The position you report for AO-40 is quite different from what we were
> > expecting for that time.
> >
> > Regards,
> > Steve Diggs, W4EPI
> > AMSAT Area Coordinator - Atlanta
> >
> > -----Original Message-----
> > From: nsallay [mailto:nsallay@internext.com.br]
> > Sent: 12/14/2000 12:31 PM
> > To: Tony Langdon; 'Jon Ogden'; Jens Spiess; AMSAT; Yoshihiro Imaishi
> > Subject: Re: [amsat-bb] Re: Ao40...copied ?CAN`T BELIEVE THAT....
> >
> >
> > Here I'm back again......
> >
> > - and still listening a very, extremely weak signal on 435.454.3 MHz USB
> > since
> >
> > UTC 16:36
> > SSP  3.8N  57.0 W on almost on "top"of my Qth 42784 Km high
> >
> > now at
> > UTC 17:18
> > SSP 4.2N  63.9 W still on "top" of my Qth 37.982 Km high, the
> > carrier, I'm unable to say it is modulated, is present with a little more
> > strengths
> >
> > Regards
> > Nicolau - PP8DA
> >
> > E-mail:  nsallay@internext.com.br
> >
> > ----- Original Message -----
> > From: "nsallay" <nsallay@internext.com.br>
> > To: "Tony Langdon" <tlangdon@atctraining.com.au>; "'Jon Ogden'"
> > <na9d@mindspring.com>; "Jens Spiess" <jspiess@dplanet.ch>; "AMSAT"
> > <amsat-bb@AMSAT.Org>; "Yoshihiro Imaishi" <imaishi@aa.mbn.or.jp>
> > Sent: Thursday, December 14, 2000 9:20 AM
> > Subject: Re: [amsat-bb] Re: Ao40...copied ?CAN`T BELIEVE THAT....
> >
> >
> > > Hello All,
> > > - the orientation of the spacecraft is likely such, that the Omni
> antennas
> > are
> > > pointing away at apogee....., etc., how did we copied Ao-40 so well
> > > during the whole day 12/12?
> > > - I was unable to copy anything the whole day,yesterday and even today
> at
> > > 12.34 UTC with AO-40 at SSP2.0 N and 14.6 W MA 148.6 Sqint 77.4.
> > > - Yesterday evening aprox 16.00 UTC I tried to listen to 435.450 Mhz GB
> > > and found a signal with a "unstabilized modulation" on 435.412.5 Mhz
> > > but was unable to "read" the signal.435.600 and 435.850 Mhz had no
> signals
> > > around.
> > > - At this moment, 13.00 UTC, I replaced the Kep data with the latest
> > available from
> > > ARRL and found on 435.430 Mhx with Doppler going down a "modulated
> > signal",
> > > I'm unable to read because of lack o tools. At this moment I have no
> pack
> > sats in
> > my
> > > area.
> > > For information purposes, I'm using 12.5 db circular right on V and U
> plus
> > _+ 20 db
> > > pre
> > > amp at the antenna, receiver is a TS 790A,my position is 3.4.36.7S and
> > 60.0.21.5W
> > > in the city of Manaus NW Brazil.
> > > During the writing of this mail,I moved several times to different
> places
> > of my
> > home
> > > and the
> > > time is 13.25 UTC and the signal is stable 4 3 with QSB and down to
> > 435.424.6 MHZ a
> > nd
> > > still no pack sats in my area.
> > >
> > > regards and 73
> > > Nicolau PP8DA
> > >
> > > E-mail:nsallay@internext.com.br
> > > ----- Original Message -----
> > > From: "Tony Langdon" <tlangdon@atctraining.com.au>
> > > To: "'Jon Ogden'" <na9d@mindspring.com>; "Jens Spiess"
> > <jspiess@dplanet.ch>;
> > "AMSAT"
> > > <amsat-bb@AMSAT.Org>; "Yoshihiro Imaishi" <imaishi@aa.mbn.or.jp>
> > > Sent: Thursday, December 14, 2000 2:56 AM
> > > Subject: RE: [amsat-bb] Re: Ao40...copied ?CAN`T BELIEVE THAT....
> > >
> > >
> > > > > Here is what we DO know:
> > > > >
> > > > > 1.) Telemetry HAS been copied AFTER the burn and AFTER the
> > > > > engines valves
> > > > > closed.  So the spacecraft did NOT blow up from the burn or
> > > > > the likelyhood
> > > > > of such is tiny.
> > > >
> > > > I copied telemetry more than 24 hours after the burn, so it did
> survive
> > the
> > > > burn itself.
> > > >
> > > > > 2.) People DID copy a weak, unmodulated carrier today on the
> > > > > AO-40 2m beacon
> > > > > frequency or thereabout.
> > > >
> > > > Unable to confirm this, haven't been near a rig when the bird was over
> > > > today.
> > > >
> > > > > 3.) The spacecraft is now at a perigee of about 60,000 KM.
> > > > > Signals will be
> > > > > VERY, VERY weak, particularly with the omni antennas activated.
> > > >
> > > > Apogee, I think you mean apogee. :)
> > > >
> > > > > 4.) The orientation of the spacecraft is likely such that the
> > > > > omni antennas
> > > > > are pointing AWAY from earth at apogee.  This can be drawn as
> > > > > a conclusion
> > > > > from the fact that the control team wants to study and test
> > > > > the high gain
> > > > > antenna particularly, the 70 cm high gain TX system.  This
> > > > > would mean that
> > > > > the omnis are pointed AWAY from the earth.
> > > >
> > > > Yes, this is likely.
> > > >
> > > > > Couple #'s 3 and 4 and you can see why most people likely
> > > > > don't hear any
> > > > > telemetry from the bird.  Some people ARE hearing a weak
> > > > > carrier with good
> > > > > AO-10 class stations.
> > > >
> > > > Perigee is still 560 km, so should be able to hear something on the
> way
> > > > down/up.
> > > >
> > > > >
> > > > > What likely happened is IHU-2 crashed again and the control
> > > > > crew has either
> > > > > not reset it yet or has been busy doing other things with the
> > > > > spacecraft
> > > > > before resetting it.  Additionally, the attitude of the
> > > > > spacecraft may be
> > > > > that it needs to go a couple of orbits before it will be in a
> position
> > > > > whereby they can reasonably command it given the likely
> > > > > orientation of its
> > > > > antennas.
> > > >
> > > > An IHU-2 crash is on the cards, and if they're looking at the 70cm Tx
> or
> > > > something else, resetting IHU-2 may be a low priority.
> > > >
> > > > I'll assume they're busy doing some testing, until I hear something to
> > the
> > > > contrary from one of the command stations or AMSAT.
> > > > ----
> > > > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > > > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> > > >
> > >
> > >
> >
> > ----
> > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
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>

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