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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

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