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    Re: Prime Meridian
    From: Jackson McDonald
    Date: 2014 Mar 19, 01:16 +0000
    Yes, the delegates to the Washington Conference were aware that astronomers might continue to use 360 degrees.  References to this point appear in the protocol of the proceedings.     
     

    From: cfuhb-acdgw@earthlink.net
    To: jacksonmcdonald@hotmail.com
    Date: Tue, 18 Mar 2014 16:56:25 -0700
    Subject: [NavList] Re: Prime Meridian


    Jackson McDonald wrote:
    > Next there were tedious, scientific (and not-so-scientific) deliberations about whether meridians of longitude should be measured 360 degrees from west to east, 360 degrees from east to west, or 180 degrees both east and west of the Prime Meridian.
    
    There's still no universal convention. Astronomy sometimes measures
    terrestrial longitude east to 360. For example, the JPL HORIZONS system
    will accept longitude -150 (= 150 west) or the equivalent +210 for the
    observing site, but in either case its output says +210.
    
    I have had to adjust longitudes with a calculator because they were
    "illegal" according to the program I was trying to use. Writers of
    astronomical software, don't get too zealous with your error checking.
    
    --
    
    
    : http://fer3.com/arc/m2.aspx?i=127261
       
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