Note:
When the apparent altitude with respect to the celestial horizon (Ha) is corrected for Atmospheric Refraction, and for Parallax and Semi Diameter (when appropriate), we arrive at the fully corrected observed altitude (Ho).
When the apparent altitude with respect to the celestial horizon (Ha) is corrected for Atmospheric Refraction, and for Parallax and Semi Diameter (when appropriate), we arrive at the fully corrected observed altitude (Ho).
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