DistortionMRSModel

class stdatamodels.jwst.datamodels.DistortionMRSModel(init=None, x_model=None, y_model=None, alpha_model=None, beta_model=None, bzero=None, bdel=None, input_units=None, output_units=None, **kwargs)

Bases: ReferenceFileModel

A model for a reference file of type “distortion” for the MIRI MRS.

Initialize the model.

Parameters:

initstr, None, optional

File name for input file in ASDF format from which to initialize the model.

x_modelastropy.modeling.core.Model, optional

Transform between the ‘detector’ frame and the frame associated with the local channel cube ‘alpha’

y_modelastropy.modeling.core.Model, optional

Transform between the ‘detector’ frame and the frame associated with the local channel cube ‘beta’

alpha_modelastropy.modeling.core.Model, optional

Transform between the local channel frame and the global instrument frame on the sky

beta_modelastropy.modeling.core.Model, optional

Transform between the local channel frame and the global instrument frame on the sky

bzerofloat, optional

Center of each slice in the local channel frame.

bdelfloat, optional

Slice width in the local channel frame.

input_unitsstr or ~astropy.units.NamedUnit, optional

The units of the input

output_unitsstr or ~astropy.units.NamedUnit, optional

The units of the output

Attributes Summary

reftype
schema_url	The schema URI to validate the model against.

Methods Summary

on_save([path])	Run a hook before writing a model to a file (FITS or ASDF).
populate_meta()
to_fits()	Write a data model to a FITS file.
validate()	Check that required reference file keywords are set.

Attributes Documentation

reftype = 'distortion'

schema_url = 'http://stsci.edu/schemas/jwst_datamodel/distortion_mrs.schema'

The schema URI to validate the model against. If None, only basic validation of required metadata properties (filename, model_type) will occur.

Methods Documentation

on_save(path=None)

Run a hook before writing a model to a file (FITS or ASDF).

Parameters:

initstr

The path to the file that we’re about to save to.

populate_meta()

to_fits()

Write a data model to a FITS file.

Parameters:

initfile path or file object

The file to write to.

*args

Additional positional arguments passed to astropy.io.fits.writeto.

**kwargs

Additional keyword arguments passed to astropy.io.fits.writeto.

validate()

Check that required reference file keywords are set.