GridData¶

class GridData(data=None, grid_wcs=None, projection_wcs=None, polarisation_frame=None)[source]¶

Bases: object

Class to hold Gridded data for Fourier processing - Has four or more coordinates: [chan, pol, z, y, x] where x can be u, l; y can be v, m; z can be w, n

The conventions for indexing in WCS and numpy are opposite. - In astropy.wcs, the order is (longitude, latitude, polarisation, frequency) - in numpy, the order is (frequency, polarisation, depth, latitude, longitude)

Warning

The polarisation_frame is kept in two places, the WCS and the polarisation_frame variable. The latter should be considered definitive.

Attributes Summary

`frequency`
`nchan`
`ndepth`
`nheight`
`npol`
`nwidth`
`phasecentre`
`shape`

Methods Summary

size()

Return size in GB

Attributes Documentation

frequency¶

nchan¶

ndepth¶

nheight¶

npol¶

nwidth¶

phasecentre¶

shape¶

Methods Documentation

size()[source]¶: Return size in GB