diff --git a/csst_cpic_sim/camera.py b/csst_cpic_sim/camera.py
index fd7bdf1a97e853bbc830ca51f6a62996c101bb1e..965d955b8a311b191b0991a587b0c95116c0e97e 100644
--- a/csst_cpic_sim/camera.py
+++ b/csst_cpic_sim/camera.py
@@ -373,7 +373,7 @@ class CpicVisEmccd(object):
 
         self.nonlinear_coefficient = -0.1
 
-        self.detector_name = 'CCD201-20-EM'
+        self.detector_name = 'VIS'
         self.ccd_label = 'EMCCD'
         self.pitch_size = 13
 
diff --git a/csst_cpic_sim/config.py b/csst_cpic_sim/config.py
index c4cca46e83490e4434cd8d59cc8d1f8e307b3431..a0f668f22da76cd42326d1179efce0f016948197 100644
--- a/csst_cpic_sim/config.py
+++ b/csst_cpic_sim/config.py
@@ -81,7 +81,7 @@ config['bands'] = {
 }
 config['diameter'] = 2  # in meters
 config['platescale'] = 0.016153
-config['datamodel'] = f'{cpism_refdata}/io/csst-cpic-l0.toml'
+config['datamodel'] = f'{os.path.dirname(config_aim)}/csst-cpic-l0.toml'
 
 config['log_dir'] = f'{cpism_refdata}/log'
 config['log_level'] = 'info'
diff --git a/csst_cpic_sim/data/csst-cpic-l0.toml b/csst_cpic_sim/data/csst-cpic-l0.toml
new file mode 100644
index 0000000000000000000000000000000000000000..bb5362472207e3565d0ebc039fe20ae88c53893d
--- /dev/null
+++ b/csst_cpic_sim/data/csst-cpic-l0.toml
@@ -0,0 +1,1468 @@
+[META]
+tag = "csst-cpic-l0"
+type = "image"
+description = "CSST CPIC L0 data model"
+
+[HDU0.SIMPLE]
+key = "SIMPLE"   
+dtype = "bool"
+example = true
+comment = "conforms to FITS standard"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.BITPIX]
+key = "BITPIX"
+dtype = "int64"
+example = 8
+comment = "array data type"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.NAXIS]
+key = "NAXIS"
+dtype = "int64"
+example = 0
+comment = "number of array dimensions"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = [0, ]
+notes = "the NAXIS of HDU0 should be always 0"
+ignore = false
+
+[HDU0.EXTEND]
+key = "EXTEND"
+dtype = "bool"
+example = true
+comment = ""
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.NEXTEND]
+key = "NEXTEND"
+dtype = "int64"
+example = 1
+comment = "number of array dimensions"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.DATE]
+key = "DATE"
+dtype = "str21"
+example = "2023-05-19T09:08:15.0"
+comment = "written date (yyyy-mm-ddThh:mm:ss.s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.FILENAME]
+key = "FILENAME"
+dtype = "str"
+example = "CSST_CPIC_VIS_SCI_20230519090815_20230519090816_40112345678_X_L0_V01"
+comment = ""
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.TELESCOP]
+key = "TELESCOP"
+dtype = "str4"
+example = "CSST"
+comment = "telescope name"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = ["CSST", ]
+notes = "the TELESCOP should be always 'CSST'"
+ignore = false
+
+[HDU0.INSTRUME]
+key = "INSTRUME"
+dtype = "str4"
+example = "CPIC"
+comment = "instrument name"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = ["CPIC", ]
+notes = "the INSTRUME should be always 'CPIC'"
+ignore = false
+
+[HDU0.OBSID]
+key = "OBSID"
+dtype = "str"
+example = "40112345678"
+comment = "observation ID"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.OBSTYPE]
+key = "OBSTYPE"
+dtype = "str"
+example = "SCI"
+comment = "observation type"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = ["SCI", "BIAS", "DARK", "FLAT", "BKG", 'LASER', 'DSF', 'CALS']
+notes = ""
+ignore = false
+
+[HDU0.DATASET]
+key = "DATASET"
+dtype = "str"
+example = "csst-cpic-c9-v1"
+comment = "dataset"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.RADECSYS]
+key = "RADECSYS"
+dtype = "str"
+example = "ICRS"
+comment = "coordinate system of the object"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.EQUINOX]
+key = "EQUINOX"
+dtype = "float64"
+example = 2000.0
+comment = ""
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.FITSSWV]
+key = "FITSSWV"
+dtype = "str"
+example = "CPISM V0.9.0"
+comment = "FITS creating software version"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.COMMENT]
+key = "COMMENT"
+dtype = "str72"
+example = "========================================================================"
+comment = ""
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.OBJECT]
+key = "OBJECT"
+dtype = "str"
+example = "080000+400000"
+comment = "object name"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.TARGET]
+key = "TARGET"
+dtype = "str15"
+example = "080000.0+400000"
+comment = "target name (hhmmss.s+ddmmss)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.RA_OBJ]
+key = "RA_OBJ"
+dtype = "float64"
+example = 120.0
+comment = "object RA (deg)"
+fill_value = ""
+vmin = 0.0
+vmax = 360.0
+enum = []
+notes = "RA should be no less than 0.0 and no more than 360.0"
+ignore = false
+
+[HDU0.DEC_OBJ]
+key = "DEC_OBJ"
+dtype = "float64"
+example = 40.0
+comment = "object Dec (deg)"
+fill_value = ""
+vmin = -90.0
+vmax = 90.0
+enum = []
+notes = "Dec should be no less than -90.0 and no more than 90.0"
+ignore = false
+
+[HDU0.REFFRAME]
+key = "REFFRAME"
+dtype = "str"
+example = "CSSTGSC-1.0"
+comment = "guiding catalog version"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.DATE-OBS]
+key = "DATE-OBS"
+dtype = "str21"
+example = "2023-05-19T09:08:15.0"
+comment = "observation date (yyyy-mm-ddThh:mm:ss.s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.SATESWV]
+key = "SATESWV"
+dtype = "str"
+example = "SIMULATION"
+comment = "satellite software version"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.EXPSTART]
+key = "EXPSTART"
+dtype = "float64"
+example = 60083.38072916667
+comment = "exposure start time (MJD)"
+fill_value = ""
+vmin = 59945.000000
+vmax = ""
+enum = []
+notes = "the vmin value of the MJD is 2023-01-01"
+ignore = false
+
+[HDU0.CABSTART]
+key = "CABSTART"
+dtype = "float64"
+example = 60083.38072916667
+comment = "first cabin time after exposure start (MJD)"
+fill_value = ""
+vmin = 59945.000000
+vmax = ""
+enum = []
+notes = "the vmin value of the MJD is 2023-01-01"
+ignore = false
+
+[HDU0.SUNANGL0]
+key = "SUNANGL0"
+dtype = "float64"
+example = 0.0
+comment = "angle between the Sun and opt axis at CABSTART"
+fill_value = ""
+vmin = 0.0
+vmax = 180.0
+enum = []
+notes = "SUNANGL0 should be no less than 0.0 and no more than 180.0"
+ignore = false
+
+[HDU0.MOONANG0]
+key = "MOONANG0"
+dtype = "float64"
+example = 0.0
+comment = "angle between the Moon and opt axis at CABSTART"
+fill_value = ""
+vmin = 0.0
+vmax = 180.0
+enum = []
+notes = "MOONANG0 should be no less than 0.0 and no more than 180.0"
+ignore = false
+
+[HDU0.TEL_ALT0]
+key = "TEL_ALT0"
+dtype = "float64"
+example = 0.0
+comment = "angle between opt axis and Elimb at CABSTART"
+fill_value = ""
+vmin = 0.0
+vmax = 90.0
+enum = []
+notes = "TEL_ALT0 should be no less than 0.0 and no more than 90.0"
+ignore = false
+
+[HDU0.POS_ANG0]
+key = "POS_ANG0"
+dtype = "float64"
+example = 0.0
+comment = "angle between y axis and North Pole at CABSTART"
+fill_value = ""
+vmin = 0.0
+vmax = 180.0
+enum = []
+notes = "POS_ANG0 should be no less than 0.0 and no more than 180.0"
+ignore = false
+
+[HDU0.POSI0_X]
+key = "POSI0_X"
+dtype = "float64"
+example = 0.0
+comment = "orbital position in X at CABSTART (km)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.POSI0_Y]
+key = "POSI0_Y"
+dtype = "float64"
+example = 0.0
+comment = "orbital position in Y at CABSTART (km)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.POSI0_Z]
+key = "POSI0_Z"
+dtype = "float64"
+example = 0.0
+comment = "orbital position in Z at CABSTART (km)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.VELO0_X]
+key = "VELO0_X"
+dtype = "float64"
+example = 0.0
+comment = "orbital velocity in X at CABSTART (km/s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.VELO0_Y]
+key = "VELO0_Y"
+dtype = "float64"
+example = 0.0
+comment = "orbital velocity in Y at CABSTART (km/s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.VELO0_Z]
+key = "VELO0_Z"
+dtype = "float64"
+example = 0.0
+comment = "orbital velocity in Z at CABSTART (km/s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.EULER0_1]
+key = "EULER0_1"
+dtype = "float64"
+example = 0.0
+comment = "Euler angle 1 at CABSTART (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.EULER0_2]
+key = "EULER0_2"
+dtype = "float64"
+example = 0.0
+comment = "Euler angle 2 at CABSTART (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.EULER0_3]
+key = "EULER0_3"
+dtype = "float64"
+example = 0.0
+comment = "Euler angle 3 at CABSTART (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.RA_PNT0]
+key = "RA_PNT0"
+dtype = "float64"
+example = 120.0
+comment = "pointing RA at CABSTART (deg)"
+fill_value = ""
+vmin = 0.0
+vmax = 360.0
+enum = []
+notes = "RA should be no less than 0.0 and no more than 360.0"
+ignore = false
+
+[HDU0.DEC_PNT0]
+key = "DEC_PNT0"
+dtype = "float64"
+example = 40.0
+comment = "pointing Dec at CABSTART (deg)"
+fill_value = ""
+vmin = -90.0
+vmax = 90.0
+enum = []
+notes = "DEC should be no less than -90.0 and no more than 90.0"
+ignore = false
+
+[HDU0.EXPEND]
+key = "EXPEND"
+dtype = "float64"
+example = 60083.38074074074
+comment = "exposure end time (MJD)"
+fill_value = ""
+vmin = 59945.000000
+vmax = ""
+enum = []
+notes = "the vmin value of the MJD is 2023-01-01"
+ignore = false
+
+[HDU0.CABEND]
+key = "CABEND"
+dtype = "float64"
+example = 60083.38074074074
+comment = "first cabin time after exposure end (MJD)"
+fill_value = ""
+vmin = 59945.000000
+vmax = ""
+enum = []
+notes = "the vmin value of the MJD is 2023-01-01"
+ignore = false
+
+[HDU0.SUNANGL1]
+key = "SUNANGL1"
+dtype = "float64"
+example = 0.0
+comment = "angle between the Sun and opt axis at CABEND"
+fill_value = ""
+vmin = 0.0
+vmax = 180.0
+enum = []
+notes = "the same as SUNANGL0"
+ignore = false
+
+[HDU0.MOONANG1]
+key = "MOONANG1"
+dtype = "float64"
+example = 0.0
+comment = "angle between the Moon and opt axis at CABEND"
+fill_value = ""
+vmin = 0.0
+vmax = 180.0
+enum = []
+notes = "the same as MOONANG0"
+ignore = false
+
+[HDU0.TEL_ALT1]
+key = "TEL_ALT1"
+dtype = "float64"
+example = 0.0
+comment = "angle between opt axis and Elimb at CABEND"
+fill_value = ""
+vmin = 0.0
+vmax = 90.0
+enum = []
+notes = "the same as TEL_ALT0"
+ignore = false
+
+[HDU0.POS_ANG1]
+key = "POS_ANG1"
+dtype = "float64"
+example = 0.0
+comment = "angle between y axis and North Pole at CABEND"
+fill_value = ""
+vmin = 0.0
+vmax = 180.0
+enum = []
+notes = "the same as POS_ANG0"
+ignore = false
+
+[HDU0.POSI1_X]
+key = "POSI1_X"
+dtype = "float64"
+example = 0.0
+comment = "orbital position in X at CABEND (km)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.POSI1_Y]
+key = "POSI1_Y"
+dtype = "float64"
+example = 0.0
+comment = "orbital position in Y at CABEND (km)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.POSI1_Z]
+key = "POSI1_Z"
+dtype = "float64"
+example = 0.0
+comment = "orbital position in Z at CABEND (km)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.VELO1_X]
+key = "VELO1_X"
+dtype = "float64"
+example = 0.0
+comment = "orbital velocity in X at CABEND (km/s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.VELO1_Y]
+key = "VELO1_Y"
+dtype = "float64"
+example = 0.0
+comment = "orbital velocity in Y at CABEND (km/s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.VELO1_Z]
+key = "VELO1_Z"
+dtype = "float64"
+example = 0.0
+comment = "orbital velocity in Z at CABEND (km/s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.EULER1_1]
+key = "EULER1_1"
+dtype = "float64"
+example = 0.0
+comment = "Euler angle 1 at CABEND (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.EULER1_2]
+key = "EULER1_2"
+dtype = "float64"
+example = 0.0
+comment = "Euler angle 2 at CABEND (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.EULER1_3]
+key = "EULER1_3"
+dtype = "float64"
+example = 0.0
+comment = "Euler angle 3 at CABEND (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.RA_PNT1]
+key = "RA_PNT1"
+dtype = "float64"
+example = 120.0
+comment = "pointing RA at CABEND (deg)"
+fill_value = ""
+vmin = 0.0
+vmax = 360.0
+enum = []
+notes = "the same as RA_PNT0"
+ignore = false
+
+[HDU0.DEC_PNT1]
+key = "DEC_PNT1"
+dtype = "float64"
+example = 40.0
+comment = "pointing Dec at CABEND (deg)"
+fill_value = ""
+vmin = -90.0
+vmax = 90.0
+enum = []
+notes = "the same as DEC_PNT0"
+ignore = false
+
+[HDU0.EPOCH]
+key = "EPOCH"
+dtype = "float64"
+example = 2023.0
+comment = "equinox of pointing RA and Dec"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDU0.EXPTIME]
+key = "EXPTIME"
+dtype = "float64"
+example = 1.0
+comment = "exposure time (s)"
+fill_value = ""
+vmin = 0.0
+vmax = ""
+enum = []
+notes = "EXPTIME should be no less than 0.0"
+ignore = false
+
+[HDU0.CHECKSUM]
+key = "CHECKSUM"
+dtype = "str"
+example = "6aaE7US96ZYE6ZY9"
+comment = "HDU checksum updated 2024-03-07T08:52:11"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = true
+
+[HDU0.DATASUM]
+key = "DATASUM"
+dtype = "str"
+example = "0"
+comment = "data unit checksum updated 2024-03-07T08:52:11"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = true
+
+[HDUN.XTENSION]
+key = "XTENSION"
+dtype = "str"
+example = "IMAGE"
+comment = "extension type"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = ["IMAGE", ]
+notes = ""
+ignore = false
+
+[HDUN.BITPIX]
+key = "BITPIX"
+dtype = "int64"
+example = 16
+comment = "array data type"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = [16, ]
+notes = ""
+ignore = false
+
+[HDUN.NAXIS]
+key = "NAXIS"
+dtype = "int64"
+example = 2
+comment = "number of array dimensions"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = [2, ]
+notes = ""
+ignore = false
+
+[HDUN.NAXIS1]
+key = "NAXIS1"
+dtype = "int64"
+example = 1088
+comment = ""
+fill_value = ""
+vmin = 1
+vmax = ""
+enum = [1088, 1080]
+notes = ""
+ignore = false
+
+[HDUN.NAXIS2]
+key = "NAXIS2"
+dtype = "int64"
+example = 1050
+comment = ""
+fill_value = ""
+vmin = 1
+vmax = ""
+enum = [1050,]
+notes = ""
+ignore = false
+
+[HDUN.PCOUNT]
+key = "PCOUNT"
+dtype = "int64"
+example = 0
+comment = "number of parameters"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.GCOUNT]
+key = "GCOUNT"
+dtype = "int64"
+example = 1
+comment = "number of groups"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.BSCALE]
+key = "BSCALE"
+dtype = "int64"
+example = 1
+comment = ""
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.BZERO]
+key = "BZERO"
+dtype = "int64"
+example = 32768
+comment = ""
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.EXTNAME]
+key = "EXTNAME"
+dtype = "str"
+example = "IMAGE"
+comment = ""
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.EXTVER]
+key = "EXTVER"
+dtype = "int64"
+example = 1
+comment = ""
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.BUNIT]
+key = "BUNIT"
+dtype = "str"
+example = "ADU"
+comment = "physical unit of array values"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = ["ADU"]
+notes = ""
+ignore = false
+
+[HDUN.FILTER]
+key = "FILTER"
+dtype = "str4"
+example = "f661"
+comment = "filter band"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = ["f520", "f661", "f750", "f820"]
+notes = ""
+ignore = false
+
+[HDUN.DETSN]
+key = "DETSN"
+dtype = "str"
+example = "CCD201-20-EM"
+comment = "detector serial number"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.DETECTOR]
+key = "DETECTOR"
+dtype = "str3"
+example = "VIS"
+comment = "detector"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = ["VIS", "NIR"]
+notes = ""
+ignore = false
+
+[HDUN.DETLABEL]
+key = "DETLABEL"
+dtype = "str"
+example = "EMCCD"
+comment = "detector label"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = ""
+notes = ""
+ignore = false
+
+[HDUN.DETTEMP]
+key = "DETTEMP"
+dtype = "float64"
+example = 173.0
+comment = "detector temperature (K)"
+fill_value = ""
+vmin = 0
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.DEWTEMP]
+key = "DEWTEMP"
+dtype = "float64"
+example = 173.0
+comment = "dewer temperature (K)"
+fill_value = ""
+vmin = 0
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.DETSIZE]
+key = "DETSIZE"
+dtype = "str11"
+example = "1080 * 1050"
+comment = "detector size"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.IMGINDEX]
+key = "IMGINDEX"
+dtype = "int64"
+example = 1
+comment = "index of image"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.IMG_EXPT]
+key = "IMG_EXPT"
+dtype = "str19"
+example = "2023-05-19T09:08:15"
+comment = "image frame exposure start time"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.IMG_CABT]
+key = "IMG_CABT"
+dtype = "str19"
+example = "2023-05-19T09:08:15"
+comment = "image frame cabin start time"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.IMG_DUR]
+key = "IMG_DUR"
+dtype = "float64"
+example = 1.0
+comment = "image frame exposure duration (s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.IMG_PA]
+key = "IMG_PA"
+dtype = "float64"
+example = 120.0
+comment = "position angle at IMG_CABT (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.IMG_RA]
+key = "IMG_RA"
+dtype = "float64"
+example = 40.0
+comment = "RA of pointing at IMG_CABT (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.IMG_DEC]
+key = "IMG_DEC"
+dtype = "float64"
+example = 0.0
+comment = "DEC of pointing at IMG_CABT (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.DATASECT]
+key = "DATASECT"
+dtype = "str11"
+example = "1024 * 1024"
+comment = "data section"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.PIXSCAL]
+key = "PIXSCAL"
+dtype = "float64"
+example = 0.016153
+comment = "pixel scale"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.PIXSIZE]
+key = "PIXSIZE"
+dtype = "float64"
+example = 13.0
+comment = "pixel size (um)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.NCHAN]
+key = "NCHAN"
+dtype = "int64"
+example = 1
+comment = "number of readout channels"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.PSCAN1]
+key = "PSCAN1"
+dtype = "int64"
+example = 8
+comment = "horizontal prescan width"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.PSCAN2]
+key = "PSCAN2"
+dtype = "int64"
+example = 0
+comment = "vertical prescan height"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.OSCAN1]
+key = "OSCAN1"
+dtype = "int64"
+example = 16
+comment = "horizontal overscan width"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.OSCAN2]
+key = "OSCAN2"
+dtype = "int64"
+example = 18
+comment = "vertical overscan width"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.UDARK]
+key = "UDARK"
+dtype = "int64"
+example = 6
+comment = "height of upside dark reference region"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.BDARK]
+key = "BDARK"
+dtype = "int64"
+example = 2
+comment = "height of downside dark reference region"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.LDARK]
+key = "LDARK"
+dtype = "int64"
+example = 16
+comment = "width of leftside dark reference region"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.RDARK]
+key = "RDARK"
+dtype = "int64"
+example = 16
+comment = "width of rightside dark reference region"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.WCSAXES]
+key = "WCSAXES"
+dtype = "int64"
+example = 2
+comment = "number of World Coordinate System axes"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CRPIX1]
+key = "CRPIX1"
+dtype = "float64"
+example = 536.5
+comment = "x-coordinate of reference pixel"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CRPIX2]
+key = "CRPIX2"
+dtype = "float64"
+example = 518.5
+comment = "y-coordinate of reference pixel"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CRVAL1]
+key = "CRVAL1"
+dtype = "float64"
+example = 120.0
+comment = "first axis value at reference pixel"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CRVAL2]
+key = "CRVAL2"
+dtype = "float64"
+example = 40.0
+comment = "second axis value at reference pixel"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CTYPE1]
+key = "CTYPE1"
+dtype = "str8"
+example = "RA---TAN"
+comment = "the coordinate type for the first axis"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CTYPE2]
+key = "CTYPE2"
+dtype = "str8"
+example = "DEC--TAN"
+comment = "the coordinate type for the second axis"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CD1_1]
+key = "CD1_1"
+dtype = "float64"
+example = 1.0
+comment = "partial of first axis coordinate w.r.t. x"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CD1_2]
+key = "CD1_2"
+dtype = "float64"
+example = -0.0
+comment = "partial of first axis coordinate w.r.t. y"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CD2_1]
+key = "CD2_1"
+dtype = "float64"
+example = 0.0
+comment = "partial of second axis coordinate w.r.t. x"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CD2_2]
+key = "CD2_2"
+dtype = "float64"
+example = 1.0
+comment = "partial of second axis coordinate w.r.t. y"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.EMGAIN]
+key = "EMGAIN"
+dtype = "float64"
+example = 30.0
+comment = "EMgain for EMCCD"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.GAIN]
+key = "GAIN"
+dtype = "float64"
+example = 8.0
+comment = "gain (e-/ADU)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.DET_BIAS]
+key = "DET_BIAS"
+dtype = "float64"
+example = 30.0
+comment = "bias voltage (mV)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.RON]
+key = "RON"
+dtype = "float64"
+example = 40.0
+comment = "readout noise (e-)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.READTIME]
+key = "READTIME"
+dtype = "float64"
+example = 0.7
+comment = "readout time (s)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.ROSPEED]
+key = "ROSPEED"
+dtype = "float64"
+example = 10000.0
+comment = "readout speed (MHz)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.LS_STAT]
+key = "LS_STAT"
+dtype = "str3"
+example = "OFF"
+comment = "lazer status"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.IWA]
+key = "IWA"
+dtype = "float64"
+example = 0.2
+comment = "inner working angle of CPIC (deg)"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.WFSINFO1]
+key = "WFSINFO1"
+dtype = "float64"
+example = 0.0
+comment = "x-direction residuals of WFS of CPIC"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.WFSINFO2]
+key = "WFSINFO2"
+dtype = "float64"
+example = 0.0
+comment = "y-direction residuals of WFS of CPIC"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.CHECKSUM]
+key = "CHECKSUM"
+dtype = "str16"
+example = "U5EIa3BHW3BHa3BH"
+comment = "HDU checksum updated 2023-05-19T09:08:15"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
+
+[HDUN.DATASUM]
+key = "DATASUM"
+dtype = "str10"
+example = "3033118449"
+comment = "data unit checksum updated 2023-05-19T09:08:15"
+fill_value = ""
+vmin = ""
+vmax = ""
+enum = []
+notes = ""
+ignore = false
diff --git a/csst_cpic_sim/io.py b/csst_cpic_sim/io.py
index 4178677e7d6f386d3264ea6907c249a1c793febf..86bf80b7787b03d2d3342b9260448999ca9d8fda 100644
--- a/csst_cpic_sim/io.py
+++ b/csst_cpic_sim/io.py
@@ -427,10 +427,10 @@ def frame_header(obs_info, index, primary_header, camera_dict):
 
     header['FILTER'] = obs_info['band']
     header['DETSN'] = '00000000000'
-    header['DETNAME'] = camera_config['detector_name']
-    header['CHIPLAB'] = camera_config['ccd_label']
+    header['DETECTOR'] = camera_config['detector_name']
+    header['DETLABEL'] = camera_config['ccd_label']
     frame_info = obs_info['frame_info'][index]
-    header['CHIPTEMP'] = float(frame_info['chiptemp']) + 273.15
+    header['DETTEMP'] = float(frame_info['chiptemp']) + 273.15
     header['DEWTEMP'] = float(camera_config['cooler_temp']) + 273.15
     header['DETSIZE'] = f"{imgszx} * {imgszy}"
     header['IMGINDEX'] = index + 1