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    Re: MP Venus PV Moon Fix Without Plot
    From: Greg Rudzinski
    Date: 2015 Dec 1, 12:05 -0800

    Francis,

    There is more. If averaging is needed then multiple observations of a PV can be made if the Hp PV altitude is adjusted for one minute of time change. The formula for this at PV is (Cos Latitude )(15') = Minutes of arc change per minute of time.  See example done this morning which averages five observations. Results were very close to actual longitude.

    Greg Rudzinski

    From: Francis Upchurch
    Date: 2015 Nov 30, 21:46 -0800

    Thanks Greg,

    that is brilliant. 

    I'll try it when and if the weather and heavens again oblige!

    Best wishes

    Francis



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