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    Re: Astra IIIb: First Impressions
    From: Bill B
    Date: 2014 Mar 13, 16:17 -0400

    On 3/13/2014 3:31 PM, Randall Morrow wrote:
    > ean, I suggest you opt to do sun index correction check as outlined in
    > the article by Starpath. (& others)
    
    I would add that when checking the the observed SD (on + off) against
    actual SD you use Frank's sight for SD. Rounding to a single decimal
    place in the NA can throw you off even if you are dead-nuts on,
    especially if you compare your on-and-off the arc limb-to-limb totals to
    4SD.
    
    Example:
    On + Off = 32.3 + 31.9 = 62.4
    IE = (32.3 - 31.9)/2 = 0.2
    Frank's SD =16.05
    4X Franks = 64.2
    NA SA  = 16.1
    4X NA SD = 64.4
    
    Frank's Almanac
    http://reednavigation.com/lunars/nadata_v5.html
    
    

       
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