called by processQC from $DFS_PRODUCT/IFS_FLAT/$DATE as
qc_IFS_FLAT -a $AB -u sphere -level 1 2\>\&1 \> $DFS_LOG/$AB.qclog
meaning output is logges to $DFS_LOG/$AB.qclog !!!
quality control script for SPHERE IFU FLAT pipeline products
level 0 : writeQC scoreQC.
level 1 : calls qc_mstplt.py -a $AB
level 1 : calls qc_mstplt.py -a $AB a second time with a distinct config file