One Spitzer/IRS issue was that the slits were too wide for the blue end PSF's, so that fractional slit-width spatial offsets for point sources led to wavelength uncertainties of order 0.01-0.03 micron. It's possible we should allow instrument packs to "turn on" some resolution/fwhm uncertainty, e.g. by returning not just a value, but a value + bounds (3 element array). This will obviously defeat a number of optimizations, so should be employed very sparingly. I also suspect this will make us wish we had made our instrument packs as a fit to fwhm(lambda) not resolution(lambda). But anyway.
One Spitzer/IRS issue was that the slits were too wide for the blue end PSF's, so that fractional slit-width spatial offsets for point sources led to wavelength uncertainties of order 0.01-0.03 micron. It's possible we should allow instrument packs to "turn on" some resolution/fwhm uncertainty, e.g. by returning not just a value, but a value + bounds (3 element array). This will obviously defeat a number of optimizations, so should be employed very sparingly. I also suspect this will make us wish we had made our instrument packs as a fit to fwhm(lambda) not resolution(lambda). But anyway.