Symbols and abbreviations for worksheet
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- Hs: Sextant height/altitude
- Ha: Apparent sextant height/altitude
- Ho: Observed sextant height/altitude
- Dip: Depression of the horizon
- Sun corr.: Sun’s altitude correction table
- Date: Date of the UT observation
- UT time: Universal time
- Index error: Refers to the alignment of its optical components
- Non adjustable error: Fixed error due machining issues
- ε: Index error plus non-adjustable error
- L: Estimated latitude
- G: Estimated longitude
- height of the eye: Height of the eye above the horizon
- LL/UP: Lower limb or upper limb of the sun
- GHA: Greenwich Hour Angle of the sun (whole hour)
- pp: Increment of the sun’s hour angle
- GHA: Greenwich Hour Angle of the sun (exact hour of the observation)
- P: Polar Hour Angle
- D: Declination of the sun (whole hour)
- corr.d : Change of declination per hour
- D: Declination of the sun (exact hour of the observation)
- Hc: Calculated height/altitude
- Z: true azimuth (o° to 180°) ancient notation
- Zv: true azimuth (0° to 360°) modern notation
- intercept: Ho- Hc
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davesmith1800