id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
1474	What is CAL_PSF_MAG_SIG supposed to mean?	Michael Wood-Vasey	magnier	"I've been assuming that CAL_PSF_MAG_SIG is supposed to be the uncertainty in the total measurement of PSF_MAG, i.e. the equivalent of PSF_INST_MAG_SIG (most likely should be the same as PSF_INST_MAG_SIG).  But I finally looked at the code and I see that it's defined as the uncertainty in the _zeropoint_calibration_, not the uncertainty in the measurement.

        psMetadataAdd (row, PS_LIST_TAIL, ""CAL_PSF_MAG_SIG"",  PS_DATA_F32, ""measured scatter of zero point calibration"", zeroptErr);

I would bet that I am not alone in my confusion.  If CAL_PSF_MAG_SIG is supposed to be the zeropoint calibration uncertainty, can we rename it to something else, e.g., CAL_PSF_ZPT_SIG, to be less confusing?

If it is supposed to just be the PSF_INST_MAG_SIG then it could easily just be set to that, but I appreciate that one would like to avoid redundancy in files."	defect	new	normal		psphot		normal