Re: our first images of the ASTRA satellite cluster

From: Tom Wagner (
Date: Sat Jun 15 2002 - 15:57:43 EDT


Concerning the relative movement of these satellites with respect to each
other, I can see that between the images taken at 01:14 and 01:17 UTC there
has been relative movement between not just two but probably all of the

I used a very sensitive technique to determine whether something has changed
between two images. I tried it on some of your pictures and it worked.

What I did was this, I tilted my head to one side and "stereofused" the
01:14 and 01:17 UTC images (that happen to be one above the other). [By
stereofuse I mean that I looked directly at one picture with my right eye
and directly at the other picture with my left eye, both eyes in focus.]
When I do this, what I see in my mind is an image, the center of which is a
combination of the two pictures I looked directly at. Any difference-- even
the slightest difference--in position of the satellites with respect to each
other is converted by my brain into relative distance. The greater the
difference in displacement that has taken place, the closer or farther away
the satellite appears---depending upon the relative direction of the
movement with respect to the other satellites.

Clear as mud huh? :~)

Anyone that has normal 3D vision can take two of the pictures and cut them
out and put them into a stereo viewer, even an old fashioned one like the
grandparents had, and see the same effect.

Nice work by the way!


----- Original Message -----
From: "Josef" <>
To: "SeeSat-L Liste" <>
Sent: Saturday, June 15, 2002 2:11 PM
Subject: our first images of the ASTRA satellite cluster

> Hi all
> last night we tested our new video camera with integration function. We
> Brent Bosharts sattracker and caputred six frames from the video signal.
> After the second picture we donīt believe it. One satellite has moved.
> Normally, I thought, geostationary satellites have fixed positions. The
> pictures are at
> available. It was beautiful to see how fast the stars moved behind the
> satellites. They only need  38 seconds to cross the view. I hope a movie
> will follow the next days.
> Have all clear skys
> Josef Huber
> munich public star observatory

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