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    Re: Fw: Chichester's Calculations ( Sine-Cosine method)
    From: Dave Walden
    Date: 2008 Dec 15, 05:36 -0800

    Here's an HO 211 solution:
    
    Hearty thanks to (and check out his other great programs!):
     
    
        REM HO-211 SIGHT REDUCTION v3.9
         REM 22 OCTOBER 2004
         REM Copyright (C) 2004 by Stanley Adams, All Rights Reserved
         REM STANLEY ADAMS
         REM sadams16@yahoo.com
         REM www.geocities.com/sadams16
    
    
     Give K the same name as Dec.
    
     K~L: Add K and Lat, if contrary name.
       Subtract smaller from larger, if same name.
    
     If t > 90� then take K from bottom of table (90�-180�).
    
     Take Z from bottom of table (90�-180�) except when K is same name as Lat
       and greater than Lat, then take Z from top of table (0�-90�).
    
     If Lat = N and t = E then Zn = Z
     If Lat = N and t = W then Zn = 360�-Z
     If Lat = S and t = E then Zn = 180�-Z
     If Lat = S and t = W then Zn = 180�+Z
       Lat > 0� is N,  t > 0� is W
       Lat < 0� is S,  t < 0� is E
    
     K and T angles within 8� of 90� cause inaccurate Hc, interpolate B(R)
    
     If A(Z) is negative when Z is near 90�, then interpolate B(Hc), or use zero
    
     Hc is below horizon if K~Lat > 90�
    
    PRESS ENTER TO CONTINUE ?
    
    
    
    LAT=   43�00.0'N,  DEC=   20�06.0'N
    LHA=  339�00.0'W,  T  =   21�00.0'E
    
     A(Dec)= 46387.0
    -B(R)  =  2610.0  Interpolation OFF
           -----------
     A(K)  = 43777.0      ?    K  =  21�24.5'N
                             +-Lat=  43�00.0'N
                                  -------------
     B(K~L)=  3160.0      ?    K~L=  21�35.5'
    +B(R)  =  2610.0
           -----------
     A(Hc) =  5770.0      ?    Hc =+ 61�07.0'
    
     A(t)  =     1.1
    +B(Dec)=  2729.0
           -----------
     A(R)  = 47296.0
    -B(Hc) = 31603.0  Interpolation OFF
           -----------
     A(Z)  = 15693.0      ?    Z = N 135.8� E,  Zn = 135.8� T
    
     Verify: Hc =  61�06.7',  Z = 135.8�,  Zn = 135.8�
    
    PRESS 'Y' TO CONTINUE
    
    
    
    E
    
    
    
    
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