Re: [GEO-Subscribers] Sich 1M
- 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
> Hello to all,
> I can't wait for the passage to morrow at 6:23 UTC (Haarlem, the
> But I'am afraid that the sat is behind the buildings east of my house.
> Ruud Jansen
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----- Original Message -----
From: "Les Hamilton" <lesw.hamilton@...>
To: "rig-l" <email@example.com>; "GEO Subscribers"
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
> 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 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.