The LSST default is to replace NAN pixels with the median value when creating master calibs. This is problematic for us when it comes to flat fields, as there are lots of NAN pixels. These come from masked regions where a source has been detected on multiple / all the raw exposures, which happens a lot because we have not been dithering properly.
The LSST default is to replace NAN pixels with the median value when creating master calibs. This is problematic for us when it comes to flat fields, as there are lots of NAN pixels. These come from masked regions where a source has been detected on multiple / all the raw exposures, which happens a lot because we have not been dithering properly.
We can improve over the default by interpolating.