RE: Satellite transit question

From: Matson, Robert (
Date: Wed Jan 08 2003 - 19:02:59 EST

  • Next message: Dale Ireland: "RE: Satellite transit question"

    Hi Ed and List,
    > Recent discussions on SeeSat involved transits of ISS across the
    > moon and I'm curious as to how one can predict the ground path of
    > such events.  The are programs (e.g. Rob Matson's SkyMap) which can
    > predict satellite transits from a particular observing location, and
    > there are others that calculate the latitude/longitude of the sub-
    > satellite point as a function of time, but I'd like to know if there
    > is a straight-forward (i.e. not trial-and-error) way to calculate the
    > geographic coordinates versus time where, say, ISS wculd be seen
    > transiting the lunar disk.
    Kevin Fetter has long asked for this feature in my EARTH program, but
    other projects have unfortunately occupied my free time over much of
    the last year.  The aforementioned EARTH program ~does~ generate
    exactly the kind of file you want (time, latitude, longitude) for
    a satellite's transit centerline track, but for *solar* transits
    rather than lunar ones.  If there is still interest out there (a
    show of hands?) I'll bite the bullet and code it in.
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