nod_pair_location
- jwst.extract_1d.source_location.nod_pair_location(input_model, middle_wl)[source]
Estimate a nod pair location from the WCS.
For MIRI, it will guess the location from the dither offsets. For NIRSpec, it will guess from the slit position. For anything else, or if the estimate fails, it will return NaN for the location.
- Parameters:
- input_modelDataModel
Model containing WCS and dither data.
- middle_wlfloat
Wavelength at the middle of the array.
- Returns:
- nod_locationfloat
The expected location of the negative trace, in the cross-dispersion direction, at the middle wavelength.