create_image

ska_sdp_datamodels.image.create_image(npixel, cellsize, phasecentre, polarisation_frame=<ska_sdp_datamodels.science_data_model.polarisation_model.PolarisationFrame object>, frequency=100000000.0, channel_bandwidth=1000000.0, nchan=3, dtype='float', clean_beam=None) → Image[source]

Create an empty image consistent with the inputs.

Parameters:

  • npixel – Number of pixels; e.g. 512

  • cellsize – cellsize in radians; e.g. 0.000015

  • phasecentre – phasecentre (SkyCoord)

  • polarisation_frame – Polarisation frame; default: PolarisationFrame(“stokesI”)

  • frequency – Start frequency; default: 1.e8

  • channel_bandwidth – Channel width (Hz); default: 1.e6

  • nchan – Number of channels in image

  • dtype – Python data type for array

  • clean_beam – dict holding clean beam e.g {“bmaj”:0.1, “bmin”:0.05, “bpa”:-60.0}

Returns:

Image