The NOVAC software uses *.pak files internally, but users are able to export spectra to the *.STD format. I tested this export feature and found that the *.std files contain the sum of the individual exposures rather than the average (as is the case for *.std files written by MobileDOAS). Similar to our plans for MobileDOAS, I suggest we add a line to all exported *.std files specifying the parameter 'IntegrationMethod' is equal to 'Sum' in this case.