def single_position(self, time, observer='SUN', frame='ECLIPJ2000',
abcorr=None):
if isinstance(observer, Body):
observer = observer.name
if isinstance(frame, Body):
frame = frame._frame or frame.name
return numpy.array(spice.spkpos(self.name, Time.fromposix(time).et(),
frame, abcorr or Body._ABCORR, observer)[0])
def position(self, times, observer='SUN', frame='ECLIPJ2000',
abcorr=None):
'''Get the position of this object relative to the observer in a
specific reference frame.
:type times: ``Iterable`` | has ``__float__()``
:arg times: The point(s) in time for which to calculate the position.
:type observer: :py:class:`~spiceminer.bodies.Body` | ``str``
:arg observer: Object to use as (0,0,0).
:type abcorr: ``str``
:arg abcorr: Aberration correction to be applied. May be one of LT,
LT+S, CN, CN+S, XLT, XLT+S, XCN, XCN+S. For explanation of these see
`here <http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/spkez_c.html#Detailed_Input>`_.
:return: (``ndarray``) -- The nx4 array containing time and
(x, y, z)-position.
:raises:
(``TypeError``) -- If an argument doesn't conform to the type
requirements.
(:py:class:`~spiceminer._spicewrapper.SpiceError`) -- If there is
necessary information missing.
'''
if isinstance(observer, Body):
observer = observer.name
if isinstance(frame, Body):
frame = frame._frame or frame.name
if isinstance(times, numbers.Real):
times = [float(times)]
if isinstance(times, collections.Iterable):
result = []
for time in times:
with ignored(spice.SpiceError):
result.append([time] + spice.spkpos(self.name,
Time.fromposix(time).et(), frame, abcorr or Body._ABCORR,
observer)[0])
return numpy.array(result).transpose()
msg = 'position() Real or Iterable argument expected, got {}.'
raise TypeError(msg.format(type(times)))
