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# Data model # L1-CPI-C Data model
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## File: *_VIS_SCI_*.*fits
### File contents
| HDU | data | note |
|------|-------------------------|------------|
| HDU0 | None | PrimaryHDU |
| HDU1 | reduced image (1k x 1k) | ImageHDU |
| HDU2 | mask image (9k x 9k) | ImageHDU |
### HDU0
| keyword | value | comment | fill value | type | module |
|---------|:------|---------------|---------------|------|-----------|
| SIMPLE | True | Fits standard | True | bool | csst_sims |
### HDU1
#### Header of `csst_ms_mbi_instrument`
| keyword | value | comment | fill value | type | module |
|-----------|:----------------------|-------------------------------------------------|--------------|------|--------------------------|
| VER_PIPE | '0.01' | version of CPI-C pipeline | '0.01' | str | csst_cpic |
| VER_QC0 | '0.01' | version of CPI-C QC0 | '0.01' | str | csst_cpic |
| VER_QC1 | '0.01' | version of CPI-C QC1 | '0.01' | str | csst_cpic |
| STA_PIPE | 0 | state of CPI-C pipeline | 1 | i8 | csst_cpic |
| STA_QC0 | 0 | state of CPI-C QC0 | 1 | i8 | csst_cpic |
| STA_QC1 | 0 | state of CPI-C QC1 | 1 | i8 | csst_cpic |
| STM_PIPE | '2022-12-30T10:18:53' | Time stamp of CPI-C pipeline processing | --- | str | csst_cpic |
| NAME | 'HR 8799' | name of target | --- | str | csst_cpic |
| I_MEAN | 10.0 | mean value of total noise of dark zone | -9999 | f32 | csst_cpic |
| I_STD | 1833.333333333333 | std value of total noise of dark zone | -9999 | f32 | csst_cpic |
| I_MARK | 'S' | Status flag for image classify | 'S' | str | csst_cpic |
| CTE_NAM | 'CTE.fits' | name of CTE reference file | '-1' | str | csst_cpic |
| CTEV_VAL | 99.99 | value of vertical CTE | -9999 | f32 | csst_cpic |
| CTEH_VAL | 99.99 | value of horizontal CTE | -9999 | f32 | csst_cpic |
| BP_NAM | 'mask.fits' | name of mask reference file | '-1' | f32 | csst_cpic |
| BP_NUM | 10 | number of bad pixel | -1 | i16 | csst_cpic |
| B_NAM | 'bias.fits' | name of bias reference file | -1 | str | csst_cpic |
| B_MEAN | 5.1 | mean value of bias reference image | -9999 | f32 | csst_cpic |
| B_STD | 1.2 | std value of bias reference image | -9999 | f32 | csst_cpic |
| SP_NUM | 10 | number of saturated pixels | -1 | i16 | csst_cpic |
| D_NAM | 'dark.fits' | name of dark reference file | '-1' | str | csst_cpic |
| D_MEAN | 0.1 | mean value of dark reference image | -9999 | f32 | csst_cpic |
| D_STD | 0.1 | std value of dark reference image | -9999 | f32 | csst_cpic |
| F_NAM | 'flat.fits' | name of flat reference file | -1 | str | csst_cpic |
| F_MEAN | 10.0 | mean value of flat reference image | -9999 | f32 | csst_cpic |
| F_STD | 5.0 | std value of flat reference image | -9999 | f32 | csst_cpic |
| NL_NAM | 'nonlin.fits' | name of nonlinear correction reference file | -1 | str | csst_cpic |
| BG_NAM | 'bg.fits' | name of background reference file | -1 | str | csst_cpic |
| CR_MOD | 'lacosmic' | mode of CR clean. 'lacosmic' or 'deepCR' | -1 | str | csst_cpic |
| CR_NUM | 10 | number of cosmic ray | -1 | i16 | csst_cpic |
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