cngi.image.reframe

reframe(ixds, outframe=None, reference_time=None, observer_location=None, target_location=None, reference_frequency=None)[source]

Change the velocity system of an image

Parameters

  • xds (xarray.core.dataset.Dataset) – input Image

  • outframe (str) – reference frame to which the input will be converted

  • reference_time (numpy.datetime64 or datetime, optional) – any valid initializer of astropy.time.TimeBase should work

  • observer_location (astropy.cordinates.SkyCoord, optional) – position and velocity of observer for frame transformation

  • target_location (astropy.cordinates.SkyCoord, optional) – position and velocity of source for frame transformation

  • reference_frequency (astropy.units.Quantity, optional) – value and unit to use when expressing the spectral value as a velocity, input to SpectralCoord doppler_rest parameter

Returns

output Image

Return type

xarray.core.dataset.Dataset