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    Re: Henning Umland's long term almanac. Is it wrong?
    From: Gary LaPook
    Date: 2016 Feb 23, 20:46 +0000
     
                Celestial Navigation Data for 2016 Feb 23 at 12:06:49 UT           
                                                                                   
                     For Assumed Position:  Latitude    N  40 00.0                 
                                            Longitude   W  60 00.0                 
                                                                                   
                            Almanac Data                |    Altitude Corrections  
     Object       GHA        Dec         Hc       Zn    |   Refr   SD    PA    Sum 
                  o   '      o   '      o   '       o   |     '     '     '     '  
     SUN        358 21.1   S 9 55.8   +14 19.8   116.5  |   -3.9  16.2   0.1  12.5 


    FRom the USNO website.

    gl

    From: Bill Lionheart <NoReply_Lionheart@fer3.com>
    To: garylapook---.net
    Sent: Tuesday, February 23, 2016 12:08 PM
    Subject: [NavList] Re: Henning Umland's long term almanac. Is it wrong?

    Thanks Fred for your detailed reply, especially diagnosis of the javascript bug. I think now that I have worked out how to use Pyephem I might abandon Henning's javascript, partly as I feel more confident in using python. My boat computer runs Navigatrix, a special boat version of Linux, so it should be easy to get the python library working and write scripts I like myself. I think there is a CN plug in for OpenCPN and I have yet to try it.
    On the other hand one thing I liked about the idea of javascript is the hope that it would run on any phone with a browser, so would be the modern version of using a programmable calculator. I suppose the logical next step is to see if pyephem runs ok with one of the Android versions of python.

    Also I will now concentrate on getting the best out of my old Davis Mk 25 plastic sextant. It seems you get lots of practice at adjusting these as I seem to have to adjust all three mirror screws every time I use it.
    [By the way sorry I double posted folks. The first one (before I tried python) gave me an error message so I thought it had not gone.]
    Best wishes
    Bill


       
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