Sight Reduction and Precomputation

Computes Altitude (Hc) and Azimuth Angle (Z) given Local hour angle (LHA), Latitude (Lat), and Declination (Dec).

To get true Azimuth (Zn) apply standard rules:

N. Lat: LHA >180, Zn = Z and LHA <180, Zn = 360 - Z

S. Lat: LHA >180, Zn = 180 - Z and LHA <180, Zn = 180 + Z

Latitude (Lat):
(degrees) Same name as declination
(minutes) Contrary name as declination

Declination (Dec):
(degrees)
(minutes)

Local Hour Angle (LHA):
(degrees)
(minutes)


     
Altitude (Hc): (degrees)

(minutes)
Azimuth Angle (Z): (degrees)

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