SDSSMuNu

class pydl.pydlutils.coord.SDSSMuNu(*args, copy=True, representation_type=None, differential_type=None, **kwargs)[source]

Bases: BaseCoordinateFrame

SDSS Great Circle Coordinates

Parameters:
muAngle

Angle corresponding to longitude measured along a stripe.

nuAngle

Angle corresponding to latitude measured perpendicular to a stripe.

Notes

https://www.sdss4.org/dr16/algorithms/surveycoords/

Attributes:
stripe

SDSS Stripe Number .

node

Node of the great circle with respect to the celestial equator. In SDSS, this is almost always RA = 95.0 degrees.

incl

Inclination of the great circle with respect to the celestial equator.

phi

Counter-clockwise position angle w.r.t. north for an arc in the +nu direction.

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

incl

name

node

stripe

Attributes Documentation

default_differential

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

default_representation

Default representation for position data

frame_attributes = {'node': <astropy.coordinates.attributes.QuantityAttribute object>, 'stripe': <astropy.coordinates.attributes.Attribute object>}
frame_specific_representation_info

Mapping for frame-specific component names

incl
name = 'sdssmunu'
node = <Quantity 95. deg>
stripe = 0