Re: visualize orbital planes

Bjoern Gimle (
Wed, 22 Jan 1997 08:01:35 +0100 (MET)

Bill Krosney <bkrosney@MBnet.MB.CA> wrote:
>I am unfamiliar with Alphonse's MirViz, but I have tried Rob Matson's 
>SkyMap.  It does great star maps....but does it do orbital planes?
>....  It is not the satellite's trajectory
>(i.e. where on Earth does it overfly over a period of time) but rather 
>the orbital plane at a single instant of time.
Sorry, I missed your point there.

SkyMap does orthographic projection of the globe(map) and the actual
orbit. If I remember correctly, MirViz also does the ground track, and
vertical lines to the orbit.

>.....  In between
>the orbital plane of Mir did pass directly over KSC, you can only guess at
>the time.  Only if Mir itself happens to pass directly over KSC do you 
>know when Mir's orbital plane passes over.
If you use the Mercator projection of TrakSat, you can measure the 
longitudinal difference between the track and the site, and convert
it to time.

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