Coordinate Systems

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Coordinate Systems

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Longitude is measured:

CoSys Q1

North or south from the equator (maximum value of 90 deg)

East or west from the Greenwich (Prime) Meridian (maximum value of 180 deg)

North or south from the celestial equator (maximum value of 90 deg)

West from the Greenwich Celestial Meridian (maximum value of 360 deg)

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