ó šßČ[c@`s(dZddlmZmZmZmZddlZddlm Z ddl m Z ddlm ZddlmZdd lmZmZd d lmZd d lmZmZd d lmZmZd dlmZdddddgZd„Zd„Z d„Z!d„Z"iZ#e$dd„Z%dS(uń This module contains convenience functions for coordinate-related functionality. This is generally just wrapping around the object-oriented coordinates framework, but it is useful for some users who are used to more functional interfaces. i(tabsolute_importtdivisiontprint_functiontunicode_literalsNi(tunits(tc(t_erfa(tascii(t isiterabletdatai(tSkyCoord(tGCRStPrecessedGeocentric(tSphericalRepresentationtCartesianRepresentation(tget_jd12ucartesian_to_sphericaluspherical_to_cartesianuget_sunu concatenateuget_constellationcC`s”t|dƒs|tj}nt|dƒs>|tj}nt|dƒs]|tj}nt|||ƒ}|jtƒ}|j|j|jfS(uĺ Converts 3D rectangular cartesian coordinates to spherical polar coordinates. Note that the resulting angles are latitude/longitude or elevation/azimuthal form. I.e., the origin is along the equator rather than at the north pole. .. note:: This function simply wraps functionality provided by the `~astropy.coordinates.CartesianRepresentation` and `~astropy.coordinates.SphericalRepresentation` classes. In general, for both performance and readability, we suggest using these classes directly. But for situations where a quick one-off conversion makes sense, this function is provided. Parameters ---------- x : scalar, array-like, or `~astropy.units.Quantity` The first cartesian coordinate. y : scalar, array-like, or `~astropy.units.Quantity` The second cartesian coordinate. z : scalar, array-like, or `~astropy.units.Quantity` The third cartesian coordinate. Returns ------- r : `~astropy.units.Quantity` The radial coordinate (in the same units as the inputs). lat : `~astropy.units.Quantity` The latitude in radians lon : `~astropy.units.Quantity` The longitude in radians uunit( thasattrtutdimensionless_unscaledRt represent_asR tdistancetlattlon(txtytztcarttsph((s8lib/python2.7/site-packages/astropy/coordinates/funcs.pytcartesian_to_sphericals#cC`st|dƒs|tj}nt|dƒs>|tj}nt|dƒs]|tj}ntd|d|d|ƒ}|jtƒ}|j|j|j fS(uV Converts spherical polar coordinates to rectangular cartesian coordinates. Note that the input angles should be in latitude/longitude or elevation/azimuthal form. I.e., the origin is along the equator rather than at the north pole. .. note:: This is a low-level function used internally in `astropy.coordinates`. It is provided for users if they really want to use it, but it is recommended that you use the `astropy.coordinates` coordinate systems. Parameters ---------- r : scalar, array-like, or `~astropy.units.Quantity` The radial coordinate (in the same units as the inputs). lat : scalar, array-like, or `~astropy.units.Quantity` The latitude (in radians if array or scalar) lon : scalar, array-like, or `~astropy.units.Quantity` The longitude (in radians if array or scalar) Returns ------- x : float or array The first cartesian coordinate. y : float or array The second cartesian coordinate. z : float or array The third cartesian coordinate. uunitRRR( RRRtradianR RRRRR(trRRRR((s8lib/python2.7/site-packages/astropy/coordinates/funcs.pytspherical_to_cartesianNs#c C`sAtjt|dƒŒ\}}|dddd…f}|dddd…f}|tjtjtjƒ}tj tj |dddƒƒ}dtj |dddƒd }tj ||j |j dƒ| ||ƒ}td | |dtjd | |dtjd | |dtjƒ}t|d td|ƒƒS(u7 Determines the location of the sun at a given time (or times, if the input is an array `~astropy.time.Time` object), in geocentric coordinates. Parameters ---------- time : `~astropy.time.Time` The time(s) at which to compute the location of the sun. Returns ------- newsc : `~astropy.coordinates.SkyCoord` The location of the sun as a `~astropy.coordinates.SkyCoord` in the `~astropy.coordinates.GCRS` frame. Notes ----- The algorithm for determining the sun/earth relative position is based on the simplified version of VSOP2000 that is part of ERFA. Compared to JPL's ephemeris, it should be good to about 4 km (in the Sun-Earth vector) from 1900-2100 C.E., 8 km for the 1800-2200 span, and perhaps 250 km over the 1000-3000. utdb.iNiitaxisi˙˙˙˙gŕ?RRRtframetobstime(i(.i(.i(.i(terfatepv00RRtto_valueRtautdtnptsqrttsumtabtreshapetshapeRtAUR R ( ttimetearth_pv_heliot earth_pv_barytearth_ptearth_vtdsunt invlorentzt properdirtcartrep((s8lib/python2.7/site-packages/astropy/coordinates/funcs.pytget_sun~s"!cC`s8t|dtƒst|ƒ r.tdƒ‚nt|ƒS(u~ Combine multiple coordinate objects into a single `~astropy.coordinates.SkyCoord`. "Coordinate objects" here mean frame objects with data, `~astropy.coordinates.SkyCoord`, or representation objects. Currently, they must all be in the same frame, but in a future version this may be relaxed to allow inhomogenous sequences of objects. Parameters ---------- coords : sequence of coordinate objects The objects to concatenate Returns ------- cskycoord : SkyCoord A single sky coordinate with its data set to the concatenation of all the elements in ``coords`` uisscalaru,The argument to concatenate must be iterable(tgetattrtFalseRt TypeErrorR (tcoords((s8lib/python2.7/site-packages/astropy/coordinates/funcs.pyt concatenate­suiaucC`sZ|dkrtdƒ‚ntsětjdƒ}tj|dddddgƒ}tjd d d ƒ}tg|jd ƒD])}|jd ƒsy|d |df^qyƒ}t j g|dD]}||^qźƒ} |td<| td`_. uiauu8only 'iau' us currently supported for constellation_listu#data/constellation_data_roman87.dattnamesuralurauudeclunameudata/constellation_names.dattencodinguUTF8u u#iiuctableu cnames_longtequinoxuB1875tdtypei˙˙˙˙iu0Could not find constellation for coordinates {0}N(t ValueErrort_constellation_dataR tget_pkg_data_contentsRtreadtdicttsplitt startswithR(tarraytisscalart transform_toR tratravelthourtdectdegtonestlentintt enumerateR*tformat(tcoordt short_nametconstellation_listtcdatatctabletcnamestltcnames_short_to_longtnmt cnames_longRJt constel_coordtrahtdecdt constellidxtnotidedtitrowtmskR>((s8lib/python2.7/site-packages/astropy/coordinates/funcs.pytget_constellationËsH !,*        ,  (&t__doc__t __future__RRRRtnumpyR(tRRt constantsRRR#tioRtutilsRR tsky_coordinateR tbuiltin_framesR R trepresentationR Rtbuiltin_frames.utilsRt__all__RRR8R=RCR:Rh(((s8lib/python2.7/site-packages/astropy/coordinates/funcs.pyt s&"    0 0 /