EngineeringCameraFrame#

class ctapipe.coordinates.EngineeringCameraFrame(*args, copy=True, representation_type=None, differential_type=None, **kwargs)[source]#

Engineering camera coordinate frame.

The camera frame is a 2d cartesian frame, describing position of objects in the focal plane of the telescope.

The frame is defined as in MAGIC and FACT. Standing in the dish, looking onto the camera, x points right and y points up.

HESS, ctapipe and sim_telarray use a different camera coordinate system: To transform H.E.S.S./ctapipe -> FACT/MAGIC, do x’ = -y, y’ = -x.

Attributes:

focal_lengthu.Quantity[length]: Focal length of the telescope as a unit quantity (usually meters)
rotationu.Quantity[angle]: Rotation angle of the camera (0 deg in most cases)
telescope_pointingSkyCoord[AltAz]: Pointing direction of the telescope as SkyCoord in AltAz
obstimeTime: Observation time
locationEarthLocation: location of the telescope

Attributes Summary

`default_differential`	Default representation for differential data (e.g., velocity)
`default_representation`	Default representation for position data
`frame_attributes`
`frame_specific_representation_info`	Mapping for frame-specific component names
`n_mirrors`	A frame attribute
`name`

Attributes Documentation

default_differential#: Default representation for differential data (e.g., velocity)

frame_attributes = {'focal_length': <astropy.coordinates.attributes.QuantityAttribute object>, 'location': <astropy.coordinates.attributes.EarthLocationAttribute object>, 'n_mirrors': <ctapipe.coordinates.camera_frame.MirrorAttribute object>, 'obstime': <astropy.coordinates.attributes.TimeAttribute object>, 'rotation': <astropy.coordinates.attributes.QuantityAttribute object>, 'telescope_pointing': <astropy.coordinates.attributes.CoordinateAttribute object>}#

frame_specific_representation_info#: Mapping for frame-specific component names

n_mirrors#

A frame attribute

Default: 1