Data Reduction Frequently Asked Questions

Why are some of the sky lines in my STARE data not corrected at all?


Bright sky lines have very steep slopes and may be flagged as cosmic ray hits. In that case they will be ignored during the sky fitting. This problem can be solved by switching off the cosmic ray detection, i.e. setting removecrhsingle-niter to 0. Due to the brighter sky lines at longer wavelengths the effect is mostly found for NIR data.