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    Re: Errors in USNO celestial data
    From: Andrew Nikitin
    Date: 2010 May 4, 05:26 -0700

    From: douglas.denny---com
    > The question is: why is the current on-line US Almanac Office giving
    > the same results as ICE which has an incorrect delta T? It would
    > appear they are using ICE as the basic core programme still, (produced
    > before 1988).
    > Any further comments will be appreciated.

    I use ICE occasionally and I am also slightly discouraged by the mismatch in
    delta T and would like to find some solution to this issue.

    I think it would be possible to file a FOIA request to the USNO for ICE
    source code. Then it could be fixed (or used to determine format of
    EPH??.DAT ephemeris files, in case delta T is stored there).

    Has anybody here done FOIA requests before and can share what is
    involved?


    nsg


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