position_angle

astropy.coordinates.position_angle(lon1, lat1, lon2, lat2)[source]

Position Angle (East of North) between two points on a sphere.

Parameters
lon1, lat1, lon2, lat2Angle, Quantity or float

Longitude and latitude of the two points. Quantities should be in angular units; floats in radians.

Returns
paAngle

The (positive) position angle of the vector pointing from position 1 to position 2. If any of the angles are arrays, this will contain an array following the appropriate numpy broadcasting rules.