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    Re: USNO Web App End Year 2035
    From: Fred Hebard
    Date: 2019 Sep 24, 15:32 -0400
    On Sep 24, 2019, at 14:02, Frank Reed <NoReply_FrankReed@fer3.com> wrote:

    Dave Walden, you wrote:
    "here's ouput from a version of USNO/CELNAV/ICE that uses JPL DE405 and the FORTRAN NOVAS from USNO."

    Aha. And it's data for 2037, so that means that the folks in the Astonomical Applications Department should be able to swap in the new version without much trouble. Good to know! 

    The binary of ICE 0.51 is available, such as at https://www.celnav.de/page3.htm, link: https://www.celnav.de/ice.zip   There is an interesting READ ME.  

    ICE 0.51 covered the years1801 to 2049, see https://www.pssurvival.com/PS/Navigation/Celestial/A_Short_Guide_To_Celestial_Navigation_2004.pdf.  As Frank Reed suggests, multiple ephemera are supported.

    ICE was discontinued, and is no longer supported in any way by the Naval Observatory.  It is in the public domain.  See https://aa.usno.navy.mil/software/docs/ice.php

    I couldn’t find the source code for ICE. Source code for NOVAS is available in Fortran, Python and C.  See https://aa.usno.navy.mil/software/novas/novas_info.php.  

    Fred Hebard

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