from astropy.coordinates.baseframe import frame_transform_graph
from astropy.coordinates.representation import (CartesianRepresentation,
SphericalRepresentation,
UnitSphericalRepresentation)
from astropy.coordinates.transformations import FunctionTransform, DynamicMatrixTransform
from astropy.coordinates.matrix_utilities import matrix_product, rotation_matrix, matrix_transpose
from sunpy.sun import constants
from .frames import Heliocentric, Helioprojective, HeliographicCarrington, HeliographicStonyhurst
try:
from astropy.coordinates.builtin_frames import _make_transform_graph_docs as make_transform_graph_docs
except ImportError:
from astropy.coordinates import make_transform_graph_docs as _make_transform_graph_docs
make_transform_graph_docs = lambda: _make_transform_graph_docs(
frame_transform_graph)
RSUN_METERS = constants.get('radius').si.to(u.m)
__all__ = [
'hgs_to_hgc', 'hgc_to_hgs', 'hcc_to_hpc', 'hpc_to_hcc', 'hcc_to_hgs',
'hgs_to_hcc', 'hpc_to_hpc', 'hcrs_to_hgs', 'hgs_to_hcrs', 'hgs_to_hgs',
'hgc_to_hgc', 'hcc_to_hcc'
]
def _carrington_offset(obstime):
"""
Calculate the HG Longitude offest based on a time
"""
if obstime is None:
"""
from __future__ import absolute_import, division
import numpy as np
from astropy import units as u
from astropy.coordinates.representation import (CartesianRepresentation,
UnitSphericalRepresentation,
SphericalRepresentation)
from astropy.coordinates.baseframe import frame_transform_graph
try:
from astropy.coordinates.builtin_frames import _make_transform_graph_docs as make_transform_graph_docs
except ImportError:
from astropy.coordinates import make_transform_graph_docs as _make_transform_graph_docs
make_transform_graph_docs = lambda: _make_transform_graph_docs(frame_transform_graph)
from astropy.coordinates.transformations import FunctionTransform, DynamicMatrixTransform
from astropy.coordinates.matrix_utilities import rotation_matrix, matrix_product, matrix_transpose
from astropy.coordinates import HCRS, get_body_barycentric, BaseCoordinateFrame, ConvertError
from astropy.tests.helper import quantity_allclose
from .frames import (HeliographicStonyhurst, HeliographicCarrington,
Heliocentric, Helioprojective)
from sunpy.sun import sun
RSUN_METERS = sun.constants.get('radius').si.to(u.m)
__all__ = ['hgs_to_hgc', 'hgc_to_hgs', 'hcc_to_hpc',
'hpc_to_hcc', 'hcc_to_hgs', 'hgs_to_hcc',
'hpc_to_hpc',
'hcrs_to_hgs', 'hgs_to_hcrs']
