Re: GEOLong available on Web site - Correction!

From: Anthony Ayiomamitis (
Date: Wed Jun 13 2001 - 13:47:51 PDT

  • Next message: George Amos: "01022A-Information please"

    Dear List,
            A retraction to my comment yesterday about the lack of concordance
    between Mike McCant's ALLDAT and GEO elset files. I went back and checked
    my quick and dirty little program (following a note from Mike) and note
    that I have a filter for the ALLDAT file to drop any elset with an epoch
    greater less than five days from today. In contrast, for the GEO file, I
    did not have the same filter on purpose since orbits for geosats are
    "stable". As a result, the exception records I thought I identified were
    really the elsets I purposely dropped from the ALLDAT file (due to aging)
    but then immediately picked up in the GEO file. I should have realized this
    was happening since the exceptions were, for the most part, one to two
    weeks old (as noted in the earlier message)  ... no kidding!
           Never code or hack during all-nighters ... it can lead to illusions
    and lapses in proper thought .... :-)
           My sincere apologies to Mike.
    Anthony Ayiomamitis wrote:
    > Ed,
    >       I just cross-checked Mike's GEO.TLE file against his ALLDAT file
    > and note that only 60% of the geosats in GEO are also in ALLDAT. Of the
    > remaining 40%, roughly 38% have epochs during the past two weeks or so
    > and the other 2% date back to 1999 and 2000.
    >       Anyway, thanks for the pointer to the geosats file ... I have
    > added it to my list of daily downloads.
    > Anthony.
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