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    Re: Lunar Distance Hs and Prism Level.
    From: Greg R_
    Date: 2007 Sep 19, 14:44 -0700

    --- Chuck Taylor  wrote:
    
    > Then what does 'a' stand for, the French word for 'intercept'?
    
    As I understand it, the 'a' stands for "apparent" (i.e.
    Height-Apparent, according to how I remember it). Basically it's Hs
    corrected for IC and Dip (but nothing else), giving you your "apparent"
    altitude/height (which, with further corrections applied - refraction,
    etc. - yields Ho, the actual observed altitude).
    
    --
    GregR
    
    
    
    
    > Frank, you wrote:
    >
    > ====
    > To translate, for those new to the topic, using Hs means a raw
    > measured
    > altitude and Hc means a computed altitude (H for hauteur -French for
    > altitude, s for sextant, c for computed).
    > ====
    >
    > Then what does 'a' stand for, the French word for 'intercept'?
    >
    > Chuck Taylor
    >  48 N
    > 122 W
    >
    >
    >
    >
    >
    >
    >
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