RampFitStep

class jwst.ramp_fitting.RampFitStep(name=None, parent=None, config_file=None, _validate_kwds=True, **kws)[source]

Bases: jwst.stpipe.core.JwstStep

This step fits a straight line to the value of counts vs. time to determine the mean count rate for each pixel.

Create a Step instance.

Parameters

  • name (str, optional) – The name of the Step instance. Used in logging messages and in cache filenames. If not provided, one will be generated based on the class name.

  • parent (Step instance, optional) – The parent step of this step. Used to determine a fully-qualified name for this step, and to determine the mode in which to run this step.

  • config_file (str path, optional) – The path to the config file that this step was initialized with. Use to determine relative path names of other config files.

  • **kws (dict) – Additional parameters to set. These will be set as member variables on the new Step instance.

Attributes Summary

algorithm

class_alias

reference_file_types

spec

weighting

Methods Summary

process(input)

This is where real work happens.

Attributes Documentation

algorithm = 'ols'
class_alias = 'ramp_fit'
reference_file_types = ['readnoise', 'gain']
spec = "\n        int_name = string(default='')\n        save_opt = boolean(default=False) # Save optional output\n        opt_name = string(default='')\n        suppress_one_group = boolean(default=True)  # Suppress saturated ramps with good 0th group\n        maximum_cores = option('none', 'quarter', 'half', 'all', default='none') # max number of processes to create\n    "
weighting = 'optimal'

Methods Documentation

process(input)[source]

This is where real work happens. Every Step subclass has to override this method. The default behaviour is to raise a NotImplementedError exception.