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Re: RE: Signal Report - AO-40



That kinda fits on what we were seeing via ChatNet in VK, .... we had an
aobserved Doppler of 1.5Hz/Min where calculated said 2.3Hz/Min, ... what we
need is confirmation that there is a carrier to find, if there is one, then
we can feed Doppler to Ken.

Paul, VP9MU
----- Original Message -----
From: "nsallay" <nsallay@internext.com.br>
To: "Diggs, Steve" <Diggs@daugherty.com>; "Ken Ernandes"
<n2wwd@mindspring.com>; "Margaret Leber (KB3DXS)" <maggie@voicenet.com>;
<n1rz@timhavens.com>
Cc: <amsat-bb@AMSAT.Org>
Sent: Thursday, December 14, 2000 22:27
Subject: Re: [amsat-bb] 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
> > > > >
> > > >
> > > >
> > >
> > > ----
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> >
> > ----
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> >
>
> ----
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>

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