starepandas.STAREDataFrame.trixel_corners_ecef

STAREDataFrame.trixel_corners_ecef(vertices=None)

Returns ECEF norm vectors of great circles constraining the trixels.

If vertices is set, the trixel corners are extracted from vertices (c.f. trixel_vertices()). If not, corners are generated from stare column.

Parameters

verticestuple (vertices data structure)

If set, the centers are extracted from the vertices.

Returns

cornersnumpy array

Corners of the trixels in ECEF representation. First dimension are the sids, second dimension the great circles, third dimension x/y/z

Examples

>>> sids = numpy.array([3458764513820540928])
>>> df = starepandas.STAREDataFrame(sids=sids)
>>> df.trixel_corners_ecef()
array([[[-0.85355339, -0.14644661,  0.49999999],
        [ 0.49999999, -0.49999999,  0.70710679],
        [ 0.14644661,  0.85355339,  0.49999999]]])