PathFromCenter¶
-
class
pvextractor.
PathFromCenter
(center, length=None, angle=None, sample=2, width=None)[source]¶ Bases:
pvextractor.Path
A simple path defined by a center, length, and position angle.
Parameters: center :
SkyCoord
The center of the path
length :
Quantity
The length of the path in angular units
angle :
Quantity
The position angle of the path, counter-clockwise
sample : int
How many points to sample along the path. By default, this is 2 (the two end points. For small fields of view, this will be a good approximation to the path, but for larger fields of view, where spherical distortions become important, this should be increased to provide a smooth path.
width : None or float or
Quantity
The width of the path. If
coords
is passed as a list of pixel positions, the width should be given (if passed) as a floating-point value in pixels. Ifcoords
is a coordinate object, the width should be passed as aQuantity
instance with units of angle. If None, interpolation is used at the position of the path.Notes
The orientation of the final path will be such that for a position angle of zero, the path goes from South to North. For a position angle of 90 degrees, the path will go from West to East.