draft of psf model

src/stdatamodels/jwst/datamodels/__init__.py

@@ -53,6 +53,7 @@
 from .photom import NisImgPhotomModel, NisSossPhotomModel, NisWfssPhotomModel
 from .photom import NrsFsPhotomModel, NrsMosPhotomModel
 from .pixelarea import PixelAreaModel, NirspecSlitAreaModel, NirspecMosAreaModel, NirspecIfuAreaModel
+from .psf import PsfModel
 from .psfmask import PsfMaskModel
 from .quad import QuadModel
 from .ramp import RampModel
@@ -134,6 +135,7 @@
     'NisImgPhotomModel', 'NisSossPhotomModel', 'NisWfssPhotomModel',
     'NrsFsPhotomModel', 'NrsMosPhotomModel',
     'PastasossModel',
+    'PsfModel',
     'PsfMaskModel',
     'QuadModel', 'RampModel',
     'RampFitOutputModel', 'ReadnoiseModel',

src/stdatamodels/jwst/datamodels/psf.py

@@ -0,0 +1,24 @@
+from .reference import ReferenceFileModel
+
+
+__all__ = ['PsfModel']
+
+
+class PsfModel(ReferenceFileModel):
+    """
+    A data model for 2-D PSF reference images
+
+    Parameters
+    __________
+    data : numpy float32 array
+         The PSF image
+
+    wave : numpy float32 array
+         Wavelength image
+
+    """
+    schema_url = "http://stsci.edu/schemas/jwst_datamodel/psf.schema"
+
+    def __init__(self, init=None, **kwargs):
+        super(PsfModel, self).__init__(init=init, **kwargs)
+

src/stdatamodels/jwst/datamodels/schemas/psf.schema.yaml

@@ -0,0 +1,44 @@
+%YAML 1.1
+---
+$schema: "http://stsci.edu/schemas/fits-schema/fits-schema"
+id: "http://stsci.edu/schemas/jwst_datamodel/psf.schema"
+allOf:
+- $ref: referencefile.schema
+- $ref: keyword_exptype.schema
+- $ref: keyword_readpatt.schema
+- $ref: keyword_psubarray.schema
+- $ref: keyword_grating.schema
+- $ref: subarray.schema
+
+- type: object
+  properties:
+    meta:
+      type: object
+      properties:
+        psf:
+          title: PSF parameters
+          type: object
+          properties:
+            subpix:
+              title: oversampling factor
+              type: number
+              fits_keyword: SUBPIX
+            center_col:
+              title: column ePSF shifted to
+              type: number
+              fits_keyword: CENTCOL
+- type: object
+  properties:
+    data:
+      title: The PSF image
+      fits_hdu: PSF
+      default: 0.0
+      ndim: 2
+      datatype: float32
+    wave:
+      title: Wavelength image
+      fits_hdu: WAVE
+      default: 0
+      ndim: 2
+      datatype: float32
+