Astronomy Event Codes

Table 5.2. Reported Astronomy Event Codes

Event CodeDescriptionSunMoon
twi18_startAstronomical twilight (-18°) start.X 
twi12_startNautical twilight (-12°) start.X 
twi6_startCivil twilight (-6°) start.X 
riseSun- or Moonrise.XX
meridianMeridian passing (noon).XX
setSun- or Moonset.XX
twi6_endCivil twilight (-6°) end.X 
twi12_endNautical twilight (-12°) end.X 
twi18_endAstronomical twilight (-18°) end.X 
antimeridianAntimeridian passing (midnight).X 
newmoonNew moon. X
firstquarterMoon in first quarter. X
fullmoonFull moon. X
thirdquarterMoon in third quarter. X

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