called by processQC from $DFS_PRODUCT/IRD_BACK/$DATE as
CALL_SYNTAX $DFO_PROC_DIR/qc_IRD_BACK -a $AB -u sphere -level 1 2\>\&1 \> $DFS_LOG/$AB.qclog
meaning output is logged to $DFS_LOG/$AB.qclog !!!
quality control script for SPHERE IRDIS BACK pipeline products
level 0 : debug case, only inplicit call of writeQC scoreQC.
level 1 : calls ${HOME}/python/qc_mstplt.py -a $AB
and calls ${HOME}/progs/gen_pipe_suppl_raw_I.py -a $AB