[Data-modeling] Astronomy: CelestialObjects andNaturalSatellites

[Ed Laurent]

>
>
> > Earth orbiting satellites will get their own special properties like
> > latitude or local time crossing the equator and that will be
> > dependent on a co-type that will probably be dependent on their type
> > of orbit. I haven't gotten to that point yet.
>

> But these properties are not really connected the fact that the
> satellite is an Earth Orbiting Satellite. Many Earth Earth Orbiting
> Satellites do not have them, and satellites in synchronous orbit
> around other planets do have them.


Maybe latitude was a bad example.  LatLong might be a system that can be
used for any sphere. I don't know. However, "local time crossing the
equator" (e.g., Landsat 7 is around 10:30 am) is probably unique to
geosynchronous Earth orbiting satellites. There are probably similar
properties of geostationary Earth orbiting satellites that have cultural or
similar relevance that would be unique to the planet we live on. Some of
those properties might be the same for geosynchronous and geostationary
satellites and could therefore reside on a more generic Earth orbiting
satellite type. That would also permit the differentiation of Earth orbiting
and non-Earth orbiting geosynchronous satellites without needed to build
mostly redundant models.
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