EXTNAME|IM1|Extension name
EXTVER|1|The ID number
BSCALE|1| 
BZERO|8| 
OBSID|CSST.20200101T000000|Observation ID
CCDNAME|CCD02|CCD name
AMPNAME|ccd02:B|Amplifier name
GAIN|1.00|Gain (e/ADU)
RDNOISE|5.00|Readout noise (e)
SATURATE|90000.0|Saturation (ADU)
RSPEED|10.0|Read speed (in MHz)
CHIPTEMP|-100.0|Chip temperature (in K)
CCDCHIP|1|CCD chip ID
CCDLABEL|GI-1|CCD chip label
HOSCAN|2000|Horizontal overscan width, per readout channel
VOSCAN|2000|Virtical overscan height, per readout channel
CCDSUM|1 1|CCD pixel summing
CCDSEC|[1:9216:9232]|CCD section
AMPSEC|[1:9216:9232]|Amplifier section
DATASEC|[1:9216,1: 9232]|Data section
DETSEC|[1:9216,1:9232]|Detector section
BIASSEC|[9216:9217,9232:9234]|Bias section
TRIMSEC|[1:9216,1:9232]|Trim section
WCSDIM|2|WCS dimensionality
EQUINOX|2000|Epoch (year)
CTYPE1|RA---TPV|Coordinate type
CTYPE2|DEC---TPV|Coordinate type
CRVAL1|1.00|Coordinate reference value
CRVAL2|1.00|Coordinate reference value
CRPIX1|1.00|Coordinate reference pixel
CRPIX2|1.00|Coordinate reference pixel
CD1_1|1|Coordinate matrix
CD2_1|0|Coordinate matrix
CD1_2|0|Coordinate matrix
CD2_2|1|Coordinate matrix
CHECKSUM|C65|SHA256 checksum of global headers