Twilight Times
For position: 0°0'N 0°0'E:
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Notes
Sun Rise and Set
The time of rising and setting is defined as the time when the sun's upper
limb meets the horizon at sea level. The sun's diameter is assumed to be 32
minutes of arc and 30 minutes are allowed for atmospheric refraction
Civil Twilight
The horizon may still be visible at this time which is when the sun's centre
is 96 degrees from the Zenith.
Nautical Twilight
The horizon is not visible at this time which is when the sun's centre is
102 degrees from the Zenith.
Times
Times shown are Zone Times and are derived from the Longitued you entered
on the Almanac setup page. No allowance is made for regions with fractional
time zones or daylight saving times adjustments.
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