[smaa]

Will altitude has an effect on , Astronomical , Nautical and Civil Twilight

Thannk you.

[Locii]

Definitions for all the different twilights at this website:

http://weather.wsmr.army.mil/def.htm

[smaa]

Thank you , but I still need an answer for this will altitude has an effect on , Astronomical , Nautical and Civil Twilight

Thank you.

[Locii]

Generally, the higher the altitude the later each of the twilight types will be.