[amsat-bb] MIR is Off, but you can Bounce (fwd)

[ulrich.wengel@xxxxxxxxxxx (Ulrich Wengel)]

Hallo, Wolfgang!

Ein MIR-Umlauf dauert etwas mehr als 90 Minuten.

Soweit ich weiß, muss erst noch eine weitere Besatzung zur MIR fliegen, um die 
Station für einen kontrollierten Absturz vorzubereiten.
Im Artikel wird der Eindruck erweckt, dass MIR abstürzt, wenn nichts weiter 
unternommen wird. Das dürfte falsch sein.
Dementsprechend ist die Bahnkurve kaum aussagekräftig - außer dass ,mna sieht, 
dass sich die Höhe geändert hat.

Gruß, Uli

Aus Amsat Space News:

* MIR NOW VACANT *
==================
On Saturday, the three-member crew of cosmonauts left the Mir space
station and switched the station to auto-pilot.  The refrigerator,
excercise machines and some computers were shut down, and mission
control will reduce their daily communication sessions with the
spacecraft from 60 down to two.

Over the next six months, the power to Mir will be reduced, and Mir's
orbital altitude will be lowered from about 225 miles down to 200 miles.
In February or March, a "clean-up" crew will travel to Mir onboard a
Soyuz spacecraft.  A Progress-M1 cargo ship will arrive to deliver fuel
to Mir, and while the crew dismantles equipment and retrieves experiments,
Progress will periodically fire its engines and lower Mir's altitude.

Once Mir's orbital altitude has been lowered to between 125 and 135 miles,
the crew will leave Mir on their Soyuz spacecraft.  The Progress ship
will then fire one last time causing Mir to enter the earth's atmosphere
and decay.  Since large portions of the spacecraft are expected to survive
the friction of the earth's atmosphere, the decay will be planned to take
place over unpopulated portions of the Pacific Ocean.




Miles Mann schrieb im AMAST-Verteiler:
>
>
>
> Hi Alexander:
>
> The Mir Space Station will be off the air until February 2000.
> The station is currently un-manned and is flying on remote control.
> The next crew will move in around February 2000, and they do plan on
> activating packet, voice and sstv.
>
>
> However, you can use Mir as a passive reflector and bounce
> a signal off of Mir.
> Mir Amateur Radio Status: Aug 4, 1999
>
> By Miles Mann WF1F,
> MAREX-NA (Manned Amateur Radio Experiment, North American Division)
>
> What do we do, while Mir is temporarily off the air?
>
> We'll, have you tried Earth-Mir-Earth?
>
> Many of you may have heard of Moon bounce, also called Earth-Moon-Earth.
> Did you know you could do the same thing with the Russian Space Station Mir.
> In the 1960's NASA launched a satellite project Echo.
> http://sulu.lerc.nasa.gov/dglover/alltext.html
>  Is was just a big inflatable balloon 100 feet in diameter
> floating  in  a  low  orbit, Mir is bigger.  Echo was the first American
>  passive
> satellite ever launched and it
> was  successful.   The  word Passive means, it had no electronics to relay
>  radio
> signals.
> The  radio  signals just bounced off the reflective material.  Terrestrial
>  radio
> stations would aim
> their  antennas at the Satellite Echo and literally bound their signals off
>  Echo
> to communication.
>
> The same theory can be used with the Russians space Station Mir.
>
> In 1994 I actually heard some echoes of a distant amateur radio station
>  actually
> bouncing off
> the  Space  Station  Mir.   It happened during a pre-arranged Mir radio
>  schedule
> with Cosmonaut
> Aleksander  Serebrov.   I  would  routinely have a schedule with the Mir crew
>  to
> make  arrangements  for  school  schedules.   A  fellow  ham  Joe  W2KQ was
>  also
> assisting  with  making the school arrangements.  I live in the Boston Mass,
>  Joe
> lives  in  New Jersey, under normal conditions I can not hear Joe on the
>  2-meter
> band.    The only time we can hear each other is during a band opening and if
>  we
> have  our  antennas  pointed  at each other.  At the time of the contact we
>  were
> both  running similar stations, each equipped with a 12dBd gain antennas and
>  150
> watts  of  raw  power  (total  ERP  2400  watts).   After  I was done talking
>  to
> Cosmonaut Aleksander, I signed clear
> knowing  that Joe would pick up the conversation.  Aleksander then began
>  talking
> to Joe W2KQ in New Jersey. After listening to Mir for a few more seconds I
>  began
> to  hear Joe's unmistakable voice echoing off the Russian Space Station Mir. 
>  At
> first  I assume we had a band opening on 2-meters.  Then I looked at my
>  computer
> to  see  where  my  antenna  was pointing.  The computer controlled antennas
>  was
> aiming  South  East,  out to sea at the Mir Space Station.  New Jersey was on
>  my
> side of my beam, not off the front or back of the beam.  Then I looked closer
>  at
> the  computer  to  see where Joe was pointing his beam.  Sure enough, Joe's
>  beam
> would be pointing North East out to sea, also towards the Mir Space Station.
> There are a few possible other explanations, but since both of our antennas
>  were
> pointing  out  to  sea and elevated up towards the Space Station Mir, it
>  seems a
> pretty good theory we were bouncing off Mir.
>
> What do you need to Mir Bounce.
> A big station.
> Antenna   12 dBd or more
> Power Raw 150 +
> Antenna preamp
> Mode CW or SSB
> So if you have a Big gun, give Earth Mir Earth a try.
>
>
>
> Copyright  1999  Miles  Mann,  All Rights Reserved.  This document may be
>  freely
> distributed via the following means - Email (including listservers), Usenet,
>  and
> World-Wide-Web.   It may not be reproduced for profit including, but not
>  limited
> to,  CD  ROMs,  books,  and/or  other  commercial  outlets without prior
>  written
> consent from the author.
> Images  received  from the MAREX-NA SSTV system on the Russian Space Station
>  Mir
> are  considered  public  domain  and  may  be  freely distributed, without
>  prior
> permission.
>
> DOSVIDANIYA Miles WF1F
>
>
>
>
>
> "Glezev Alexander Krassimirov" <AKG980@st.aubg.bg> on 09/04/99 11:07:17 AM
>
> To:   amsat-bb@AMSAT.Org
> cc:    (bcc: Miles Mann/PicTel)
> Subject:  [amsat-bb] MIR?
>
>
>
>
> Hello from LZ2CAG, Alex.
>
> I need information as to which satellites I can hear with a 2-metre
> handy and a rubber duck. Appreciate any help on this matter.
>
> Which frequency do I have to listen on, so thah I'll be able to hear
> MIR? (again 2-metre).
>
> Thank you in advance.
>
> Many 73 de LZ2CAG
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Ulrich Wengel
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