NominalFrame#

class ctapipe.coordinates.nominal_frame.NominalFrame(*args, **kwargs)[source]#

Bases: BaseCoordinateFrame

Nominal coordinate frame.

A Frame using a UnitSphericalRepresentation. This is basically the same as a HorizonCoordinate, but the origin is at an arbitrary position in the sky. This is what astropy calls a SkyOffsetCoordinate

If the telescopes are in divergent pointing, this Frame can be used to transform to a common system.

Attributes:

origin: astropy.coordinates.SkyCoord[AltAz]: Origin of this frame as a HorizonCoordinate
obstime: astropy.time.Time: Observation time
location: astropy.coordinates.EarthLocation: 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
`location`	A frame attribute
`name`
`obstime`	A frame attribute
`origin`	A frame attribute

Attributes Documentation

default_differential: ClassVar[type[r.BaseDifferential] | None]#: Default representation for differential data (e.g., velocity)

default_representation: ClassVar[type[r.BaseRepresentation] | None]#: Default representation for position data

frame_attributes: dict[str, Attribute] = {'location': <astropy.coordinates.attributes.EarthLocationAttribute object>, 'obstime': <astropy.coordinates.attributes.TimeAttribute object>, 'origin': <astropy.coordinates.attributes.CoordinateAttribute object>}#

frame_specific_representation_info: ClassVar[dict[type[r.BaseRepresentationOrDifferential], list[RepresentationMapping]]]#: Mapping for frame-specific component names

location#

A frame attribute

No default value

name = 'nominalframe'#

obstime#

A frame attribute

No default value

origin#

A frame attribute

No default value