ISIS bug - predefined dispersion used with reference line
Posted: Sat May 09, 2020 3:04 pm
ISIS has a useful feature where the predefined dispersion equation mode can be used with a single reference line which uses the same dispersion equation but recalculates the offset coefficent A0 based on a single reference line (Normally you enter 0,0 for the reference line which forces ISIS to use the full predefined dispersion equation. If you enter the wavelength of a line and the approximate position in pixels in the calibration image it uses this instead.)
This correctly shifts the calibrated spectrum as expected but it calculates the spectrum over the original wavelength range. This produces incorrect constant values on one edge and crops the other edge of the spectrum.
ISIS V5.9.3
This correctly shifts the calibrated spectrum as expected but it calculates the spectrum over the original wavelength range. This produces incorrect constant values on one edge and crops the other edge of the spectrum.
ISIS V5.9.3
- ISIS_predifined_dispersion_bug.png (18.28 KiB) Viewed 2687 times