The results are written to the log files log.mapstats and log.calstats (known calibrators only).
The image statistics are calculated over the rectangular area defined by the requested map size in the FITS headers MAP_HGHT, MAP_WDTH and MAP_PA. For SCUBA2 maps this will normally be a square region in the centre of the map.
The input files must correspond to single observations, not coadds, because the elapsed time cannot be calculated for coadds. The recipe will print an error if it detects that the input data have been coadded/mosaicked.
The results are quoted in the same units as the input file. Note, however, the log file will contain the units corresponding to the first entry.
See also SCUBA2_CHECK_CAL and SCUBA2_CHECK_RMS.