IFUPostModel

class jwst.datamodels.IFUPostModel(init=None, slice_models=None, **kwargs)

Bases: ReferenceFileModel

A model for a NIRSPEC reference file of type “ifupost”.

Initialize the model.

Parameters:

initstr, None, optional

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

slice_modelsdict

A dictionary with slice transforms with the following entries {“slice_N”: {‘linear’: astropy.modeling.Model, … ‘xpoly’: astropy.modeling.Model, … ‘xpoly_distortion’: astropy.modeling.Model, … ‘ypoly’: astropy.modeling.Model, … ‘ypoly_distortion’: astropy.modeling.Model, … }} These are the transforms from the IFU slicer plane to the MSA frame.

Raises:

ValueError

If the number of slice models is not 30.

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 = 'ifupost'

schema_url = 'http://stsci.edu/schemas/jwst_datamodel/ifupost.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.