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Re: [GEO-Subscribers] Sich 1M

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  • ruud@farbridges.net
    Hello to all, I record this morning a short Sich transmission at 7:28 UTC. You can find this image on my page www.jendela.nl/sich ruud jansen
    Message 1 of 31 , Feb 1, 2005
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      Hello to all,
      I record this morning a short Sich transmission at 7:28 UTC.
      You can find this image on my page www.jendela.nl/sich
      ruud jansen
      Citeren ruud@...:

      >
      > Hello to all,
      > I can't wait for the passage to morrow at 6:23 UTC (Haarlem, the
      > Netherlands).
      > But I'am afraid that the sat is behind the buildings east of my house.
      > Ruud Jansen
      >
      >
      >
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    • Douglas Deans
      ... From: Les Hamilton To: rig-l ; GEO Subscribers Sent: Sunday,
      Message 31 of 31 , Jan 22, 2006
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        ----- Original Message -----
        From: "Les Hamilton" <lesw.hamilton@...>
        To: "rig-l" <rig-l@yahoogroups.com>; "GEO Subscribers"
        <GEO-Subscribers@yahoogroups.com>
        Sent: Sunday, January 22, 2006 10:00 AM
        Subject: [GEO-Subscribers] Sich 1M


        > Here's a query for all you satellite watchers out there.
        >
        > We understand that Sich-1M failed to reach its designed orbit, and it was
        > widely predicted that it would, sooner rather than later, burn up as it
        > re-entered the atmosphere. However, it is still up there.
        >
        > I was playing about in a tracking program, and noticed that the
        > eccentricity
        > of Sich-1M's orbit has in fact considerably reduced in the past year. In
        > February 2005 the figure was 0.024: currently it is 0.011.
        >
        > Does this suggest that the satellite is gradually being recovered, or what
        > .
        > . ?
        >
        > Les
        >
        > Les Hamilton


        Les I am no expert but my own guess is that the eccentricity is being
        knocked out of it as it gets lower and lower into the atmosphere. If you
        project the current keplers to July....the satellite has gone.
        I remember Peter Wakelin (who IS an expert) explaining that the orbit
        deterioration varies in accordance with when perigee corresponds to certain
        parts of the earth curvature ie deterioration will be more rapid when
        perigee is at its worst. Perigee is slowly changing in respect to orbit
        due the satellite's unstable position. Hence the rate of decay is quite
        variable with quite large gaps between the maximums.

        Regards
        Douglas.
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