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    Re: HP 48GX Sight Reduction Programs
    From: Glendon
    Date: 2001 Oct 06, 5:49 PM

    Hi Aubrey,
    It sounds like you are going down the same track as me.
    My copy of Meeus is in the post on the high seas. Meanwhile I intend trying to 
    get some of the almanacs and sight reduction programs on www.hpcalc.org 
    working...but have to build my HP to PC cable first! At first glance, these 
    programs don't seem to have a friendly user interface, and its very difficult 
    working through somebody elses RPL.
    I would certainly be interested in sharing experiences or collaborating to 
    reduce work. What programming language are you using? I understand User RPL 
    is basically compatible across the 48/49 range, provided care is taken not to 
    use the special instructions peculiar to the later machines...ie User RPL is 
    upwards compatible, but not downwards if the extended instruction set in 
    later machines is used. Does your manual have any comments on compatibility??
    Perhaps we should take this discussion off List?? Others who may be interested can follow.
    Lee Martin
      ----- Original Message -----
      From  Aubrey O'Callaghan
      Sent: Friday, October 05, 2001 11:41 PM
      Subject: Re: HP 48GX Sight Reduction Programs
      I recently bought a HP49G and a copy of Meeus Astronomical Algorithms. I 
    have been busy doing some initial programming.
      I have got almanac sorted out for sun positions and moon positions.
      I'm finding it quite a good way to learn my way around the HP programming language.
      Progress is quite slow as I have too many other things to do, but I'm happy 
    to share my experiences with you.

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