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# L1-MBI Data model
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- 每一个模块的结果单独开一个section，以COMMENT分隔（参考0级数据）
- 精简、丰富、修改每个关键字定义的comment
- `---`表示在模块算法失败的情况下按照实际情况填写，比如无论模块是否成功，时间戳都应该填写实际值
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- keyword开头是“-”号的，根据理解和最终的产品无关，建议去掉
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- keyword开头是“*”号的，表示有所修改，请检查是否需要，完善注释，并检查对fill value的设置是否合理
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- flux模块中的天光背景测量已经移动到instrumens，请把该数值利用zp转换为SKY_MAG（单位mag/arcsed^2）
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- 版本，完成时间，状态三个参数的name进行了统一，分别以VER_，STM_，STA_开头
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## File: *_{img/wht/flg}_L1_1.fits

### File contents
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| HDU  | data                    | note       |
|------|-------------------------|------------|
| HDU0 | None                    | PrimaryHDU |
| HDU1 | reduced image (9k x 9k) | ImageHDU   |

### HDU0
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| keyword | value | comment       | fill value    | type | module    |
|---------|:------|---------------|---------------|------|-----------|
| SIMPLE  | True  | Fits standard | True          | bool | csst_sims |
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### HDU1

#### Header of `csst_ms_mbi_instrument`
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| keyword   | value                 | comment                                         | fill value   | type | module                   |
|-----------|:----------------------|-------------------------------------------------|--------------|------|--------------------------|
| *STA_BIAS | 0                     | Status flag for bias frame correction           | 1            | i8   | csst_ms_mbi_instrument   |
| *STA_DARK | 0                     | Status flag for dark frame correction           | 1            | i8   | csst_ms_mbi_instrument   |
| *STA_FLAT | 0                     | Status flag for flat frame correction           | 1            | i8   | csst_ms_mbi_instrument   |
| *SKY_BKG  | 0.1                   | Estimated sky background (e-/s per pixel)       | -9999        | f32  | csst_ms_mbi_instrument   |
| *SKY_RMS  | 10.0                  | *Standard dev of frame background (ADU) -> e-/s | -9999        | f32  | csst_ms_mbi_instrument   |        
| SATURATE  | 1833.333333333333     | The flux limit of saturated pixel (e-/s)        | -9999        | f32  | csst_ms_mbi_instrument   |
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| *STA_CTE  | 0                     | Status flag for CTE correction                  | 1            | bool | csst_ms_mbi_instrument   |
| *STA_SAT  | 0                     | Status flag for satellite correction            | 1            | bool | csst_ms_mbi_instrument   |
| *STA_CRS  | 0                     | Status flag for cosmic rays mask                | 1            | bool | csst_ms_mbi_instrument   |
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| CRCOUNT   | 66791                 | Cosmic rays counts                              | -9999        | i8   | csst_ms_mbi_instrument   |
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| *STA_NLIN | 0                     | Status flag for non-linear correction           | 1            | bool | csst_ms_mbi_instrument   |
| *STA_SHUT | 0                     | Status flag for shutter effect correction       | 1            | bool | csst_ms_mbi_instrument   |
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| *VER_INST | '0.0.1   '            | Version of instrument processing                | '0.0.1   '   | str  | csst_ms_mbi_instrument   |
| *STM_INST | '2022-12-30T10:18:53' | Time stamp of instrument processing             | ---          | str  | csst_ms_mbi_instrument   |
| *STA_INST | 0                     | 0=done 1=wrong                                  | 1            | i8   | csst_ms_mbi_distortion   | 
| DATASUM   | '1352015684'          | *data unit checksum updated 2022-10-28T19:29:10 | ---          | str  | csst_ms_mbi_instrument   |
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#### Header of `csst_ms_mbi_distortion`
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| keyword  | value                 | comment                             | fill value | type | module                 |
|----------|:----------------------|-------------------------------------|------------|------|------------------------|
| *RADESYS | 'ICRS    '            |                                     | '?'        | str  | csst_ms_mbi_distortion |
| *NS_DIST | 11                    | The number of stars used in fitting | ---        | i8   | csst_ms_mbi_distortion | 
| PV1_0    | 0.003205383944913964  |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV1_1    | 0.8673020820536499    |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV1_2    | -0.2011989871377834   |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV1_3    | -0.2597214229472611   |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV1_4    | 0.4353828741811097    |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV1_5    | -0.5054216569802673   |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV1_6    | 0.1951474426617432    |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV2_0    | 0.00109803885992697   |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV2_1    | 0.9171065857705857    |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV2_2    | -0.04908256792722099  |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV2_3    | -0.09860562038448289  |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV2_4    | 0.07961855240788976   |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV2_5    | -0.2009224365497067   |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| PV2_6    | 0.1741954691884874    |                                     | -9999      | f32  | csst_ms_mbi_distortion |
| RA_OFF   | -0.0                  | RA offset (mas)                     | -9999      | f32  | csst_ms_mbi_distortion |
| DEC_OFF  | 0.0                   | Dec offset (mas)                    | -9999      | f32  | csst_ms_mbi_distortion |
| RA_RMS   | 127.1                 | RA RMS (mas)                        | -9999      | f32  | csst_ms_mbi_distortion |
| DEC_RMS  | 60.4                  | Dec RMS (mas)                       | -9999      | f32  | csst_ms_mbi_distortion |
| RA_CEN   | 192.1940713422841     | The center of detector in ra        | ---        | f32  | csst_ms_mbi_distortion |
| DEC_CEN  | 26.72643742371229     | The center of detector in dec       | ---        | f32  | csst_ms_mbi_distortion |
| VER_DIST | '1.0     '            | Version of distortion               | '1.0'      | str  | csst_ms_mbi_distortion |
| STM_DIST | '2022-12-29T16:36:47' | Time stamp of distortion            | ---        | str  | csst_ms_mbi_distortion |
| STA_DIST | 0                     | 0=done 1=wrong                      | 1          | i8   | csst_ms_mbi_distortion |
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#### Header of `csst_ms_mbi_position`
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| keyword   | value                    | comment                                    | fill value | type | module                  |
|-----------|:-------------------------|--------------------------------------------|------------|------|-------------------------|
| RADESYS   | 'ICRS    '               | should be always 'ICRS'                    | '?'        | str  | csst_ms_mbi_position    |                             
| PV1_0     | -7.032303876526E-04      |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV1_1     | 9.986639936274E-01       |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV1_2     | -3.506141592607E-03      |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV1_4     | -2.342575913122E-03      |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV1_5     | -2.216829433925E-03      |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV1_6     | -5.122207406521E-03      |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV2_0     | -6.939462894407E-04      |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV2_1     | 9.988294486003E-01       |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV2_2     | -1.687802061938E-03      |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV2_4     | 1.561587727533E-03       |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV2_5     | -4.159618376671E-03      |                                            | -9999      | f32  | csst_ms_mbi_position    |
| PV2_6     | 3.398895060382E-03       |                                            | -9999      | f32  | csst_ms_mbi_position    |
| -FGROUPNO | 1                        | SCAMP field group label                    |            | i8   | csst_ms_mbi_position    |
| -ASTIRMS1 | 0.000000000000E+00       | Astrom. dispersion RMS (intern., high S/N) |            | f32  | csst_ms_mbi_position    |    
| -ASTIRMS2 | 0.000000000000E+00       | Astrom. dispersion RMS (intern., high S/N) |            | f32  | csst_ms_mbi_position    |
| *ASTRRMS1 | 6.458653303335E-06       | Astrom. dispersion RMS (ref., high S/N)    |            | f32  | csst_ms_mbi_position    |
| *ASTRRMS2 | 8.724734011714E-06       | Astrom. dispersion RMS (ref., high S/N)    |            | f32  | csst_ms_mbi_position    |       
| -ASTINST  | 1                        | SCAMP astrometric instrument label         |            | i8   | csst_ms_mbi_position    |
| -FLXSCALE | 1.000000000000E+00       | SCAMP relative flux scale                  |            | f32  | csst_ms_mbi_position    |                     
| -MAGZEROP | 0.00000000               | SCAMP zero-point                           |            | f32  | csst_ms_mbi_position    |                               
| -PHOTIRMS | 0.00000000               | mag dispersion RMS (internal, high S/N)    |            | f32  | csst_ms_mbi_position    |
| -PHOTINST | 1                        | SCAMP photometric instrument label         |            | i8   | csst_ms_mbi_position    |
| -PHOTLINK | F                        | True if linked to a photometric field      |            | bool | csst_ms_mbi_position    |
| *STA_POSI | 0                        | 0=done                                     |            | i8   | csst_ms_mbi_position    | 
| *VER_POSI | '2.0.4   '               | Version of WCS calibration                 | '2.0.4   ' | str  | csst_ms_mbi_position    |        
| *CFG_POSI | 'default.scamp'          | Configure file name of WCS                 | ---        | str  | csst_ms_mbi_position    |                    
| *STM_POSI | '2022-12-30 18:32:46 PM' | Time of last wcs calibration               | ---        | str  | csst_ms_mbi_position    |
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#### Header of `csst_ms_mbi_flux`
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| keyword     | value                 | comment                                        | fill value      | type | module             |
|-------------|:----------------------|------------------------------------------------|-----------------|------|--------------------|
| REF_FLUX    | 'GAIA_DR3  '          | the reference database for calibration         | '?'             | str  | csst_ms_mbi_flux   |
| ZP          | 23.8435               | photometric zero point in magnitude            | -9999           | f32  | csst_ms_mbi_flux   |
| ZPRMS       | 0.0101                | zpt rms of the matched objects                 | -9999           | f32  | csst_ms_mbi_flux   |                
| APER_R      | 10                    | (pixels) photo-aperture radius                 | 10              | i8   | csst_ms_mbi_flux   |            
| FWHM        | 2.147                 | FWHM in pixel                                  | -9999           | f32  | csst_ms_mbi_flux   |
| *RA_OFF1    | -0.188                | median positional offset from GAIA, in arcsec  | -9999           | f32  | csst_ms_mbi_flux   |
| *DEC_OFF1   | -0.1061               | median positional offset from GAIA, in arcsec  | -9999           | f32  | csst_ms_mbi_flux   | 
| *NS_FLUX    | 49                    | total number of stars detected                 | ---             | i8   | csst_ms_mbi_flux   | 
| *NS_MATCH   | 25                    | total number of matched stars in 2 arcsec      | ---             | i8   | csst_ms_mbi_flux   |
| *MED_CLR    | 0.0                   | median (BP-RP)_GAIA of matched stars           | -9999           | f32  | csst_ms_mbi_flux   |
| *SKY_MAG    | 0.0359                | mag/arcsec^2                                   | -9999           | f32  | csst_ms_mbi_flux   |                 
| -SKY_RMS1   | 0.1766                | rms/pixel of the sky in unit of e-/s           | -9999           | f32  | csst_ms_mbi_flux   | 
| *MAG_LIM    | 21.83                 | magnitude limiting of 5-sigma galaxy detection | -9999           | f32  | csst_ms_mbi_flux   | 
| *STA_FLUX   | 0                     | flux calibration status                        | 1               | i8   | csst_ms_mbi_flux   |                       
| *VER_FLUX   | '1.3     '            | version of calibration code                    | '1.3'           | str  | csst_ms_mbi_flux   |
| *STM_FLUX   | '2022-12-30 18:36:05' | flux calibration operation time                | ---             | str  | csst_ms_mbi_flux   |
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#### Header of `csst_ms_qc0 qc0 check`
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| keyword   | value   | comment                                       | fill value | type  | module        |
|-----------|---------|-----------------------------------------------|------------|-------|---------------|
| *CRCCHECK | T       | CRC check                                     | F          | bool  | csst_ms_qc0   |
| PRIPARAM  | 0       | Primary parameters verification               | 1          | int   | csst_ms_qc0   |
| SECPARAM  | 0       | Secondary parameters verification             | 1          | int   | csst_ms_qc0   |
| *STA_QC0  | 0       | QC0 Status (0/non-zero)                       | -1         | int   | csst_ms_qc0   |
| *DATAERR  | F       | indicating data error                         | T          | bool  | csst_ms_qc0   |
| *IMGERR   | F       | indicating image error                        | T          | bool  | csst_ms_qc0   |
| SHUTTER   | F       | indicating shutter error                      | T          | bool  | csst_ms_qc0   |
| FAILGUID  | F       | missing guiding stars                         | T          | bool  | csst_ms_qc0   |
| FAILCOOL  | F       | indicating system cooling error               | T          | bool  | csst_ms_qc0   |
| GUID_OFF  | 0.0     | guiding stars offset (arcsec)                 | -9999      | f32   | csst_ms_qc0   |
| DEAD_CCD  | F       | indicating dead CCD                           | T          | bool  | csst_ms_qc0   |
| NOIS_CCD  | F       | indicating higher CCD noise level             | T          | bool  | csst_ms_qc0   |
| FF_PETAL  | F       | indicating image diffraction pattern          | T          | bool  | csst_ms_qc0   |
| GUID_ERR  | F       | indicating larger guiding offset              | T          | bool  | csst_ms_qc0   |
| CROSTALK  | F       | indicating significant image crosstalk        | T          | bool  | csst_ms_qc0   |
| BADPIXFR  | 0.0     | CCD bad pixel fraction (unitless)             | -9999      | f32   | csst_ms_qc0   |
| PSF_SIZE  | 0.0     | Best-fit PSF size from guider                 | -9999      | f32   | csst_ms_qc0   |
| STRLIGHT  | F       | Significant stray light effect in this field  | T          | bool  | csst_ms_qc0   |
| BAD_ROT   | F       | indicating bad rotation effect in this field  | T          | bool  | csst_ms_qc0   |
| BRI_STAR  | F       | Significant bright star in this field         | T          | bool  | csst_ms_qc0   |
| CCD_TEMP  | 0.0     | Large CCD temperature variation in this field | -9999      | f32   | csst_ms_qc0   |
| VER_QC0   | '0.0.1' | Pipeline version                              | '0.0.1'    | str   | csst_ms_qc0   |
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#### Header of `csst_ms_qc0 qc1 check`
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| keyword  | value     | comment                 | fill value    | type  | module        |
|----------|:----------|-------------------------|---------------|-------|---------------|
| *STA_QC1 | 0         | QC1 Status (0/non-zero) | -1            | int   | csst_ms_qc0   |
| ME_FWHM  | 0.158212  | MEAN FWHM (in arcsec)   | -9999         | f32   | csst_ms_qc0   |
| WCS_OFF  | T         | WCS OFFSET (T/F)        | F             | bool  | csst_ms_qc0   | 
| VER_QC1  | '0.0.1'   | Pipeline version        | '0.0.1'       | str   | csst_ms_qc0   |
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## File: *_cat.fits

### File contents
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| HDU  | data                    | note       |
|------|-------------------------|------------|
| HDU0 | None                    | PrimaryHDU |
| HDU1 | Table                   | ImageHDU   |

### HDU0

#### Header of photometry
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| keyword            | value                             | comment                                     | fill value | type  | module                   |
|--------------------|:----------------------------------|---------------------------------------------|------------|-------|--------------------------|
| APERSIZE           | '3,4,5,6,8,10,13,16,20,25,30,40,' | aperture radii in pixels                    |            | str   | csst_ms_mbi_photometry   |   
| NS_APER            | 75                                | number of stars used in aperture correction |            | i8    | csst_ms_mbi_photometry   | 
| APCOR0             | -0.06074262037873268              | mag correction for aperture #0              |            | f32   | csst_ms_mbi_photometry   |              
| APERR0             | 0.0                               | mag correction error for aperture #0        |            | f32   | csst_ms_mbi_photometry   |
| APCOR1             | -0.01975813694298267              | mag correction for aperture #1              |            | f32   | csst_ms_mbi_photometry   |        
| APERR1             | 0.0                               | mag correction error for aperture #1        |            | f32   | csst_ms_mbi_photometry   |        
| APCOR2             | 0.0                               | mag correction for aperture #2              |            | f32   | csst_ms_mbi_photometry   |        
| APERR2             | 0.0                               | mag correction error for aperture #2        |            | f32   | csst_ms_mbi_photometry   |        
| APCOR3             | 0.01290098764002323               | mag correction for aperture #3              |            | f32   | csst_ms_mbi_photometry   |        
| APERR3             | 0.0                               | mag correction error for aperture #3        |            | f32   | csst_ms_mbi_photometry   |        
| APCOR4             | 0.02804811112582684               | mag correction for aperture #4              |            | f32   | csst_ms_mbi_photometry   |        
| APERR4             | 0.0                               | mag correction error for aperture #4        |            | f32   | csst_ms_mbi_photometry   |        
| APCOR5             | 0.03705496713519096               | mag correction for aperture #5              |            | f32   | csst_ms_mbi_photometry   |        
| APERR5             | 0.0                               | mag correction error for aperture #5        |            | f32   | csst_ms_mbi_photometry   |        
| APCOR6             | 0.04462624341249466               | mag correction for aperture #6              |            | f32   | csst_ms_mbi_photometry   |        
| APERR6             | 0.0                               | mag correction error for aperture #6        |            | f32   | csst_ms_mbi_photometry   |        
| APCOR7             | 0.05059236660599709               | mag correction for aperture #7              |            | f32   | csst_ms_mbi_photometry   |            
| APERR7             | 0.0                               | mag correction error for aperture #7        |            | f32   | csst_ms_mbi_photometry   |        
| APCOR8             | 0.05710481852293015               | mag correction for aperture #8              |            | f32   | csst_ms_mbi_photometry   |        
| APERR8             | 0.0                               | mag correction error for aperture #8        |            | f32   | csst_ms_mbi_photometry   |        
| APCOR9             | 0.06682745367288589               | mag correction for aperture #9              |            | f32   | csst_ms_mbi_photometry   |        
| APERR9             | 0.0                               | mag correction error for aperture #9        |            | f32   | csst_ms_mbi_photometry   |        
| APCOR10            | 0.07620415091514587               | mag correction for aperture #10             |            | f32   | csst_ms_mbi_photometry   |        
| APERR10            | 0.0                               | mag correction error for aperture #10       |            | f32   | csst_ms_mbi_photometry   |        
| APCOR11            | 0.0952027440071106                | mag correction for aperture #11             |            | f32   | csst_ms_mbi_photometry   |        
| APERR11            | 0.0                               | mag correction error for aperture #11       |            | f32   | csst_ms_mbi_photometry   |        
| HIERARCH ns_HYBRID | 328                               | number of stars used in HYBRID correction   |            | i8    | csst_ms_mbi_photometry   |          
| HYBCOR             | 0.0498337559401989                | mag correction for HYBRID                   |            | f32   | csst_ms_mbi_photometry   |        
| HYBERR             | 0.000711286964798456              | mag correction error                        |            | f32   | csst_ms_mbi_photometry   |        
| NS_PSF             | 306                               | number of stars used in PSF correction      |            | i8    | csst_ms_mbi_photometry   |        
| PSFCOR             | -0.00268870708532631              | mag correction for PSF                      |            | f32   | csst_ms_mbi_photometry   |        
| PSFERR             | 0.000903990056504255              | mag correction error                        |            | f32   | csst_ms_mbi_photometry   |        
| NS_MODEL           | 324                               | number of stars used in MODEL correction    |            | i8    | csst_ms_mbi_photometry   |       
| MODCOR             | 0.04189466685056686               | mag correction for MODEL                    |            | f32   | csst_ms_mbi_photometry   |        
| MODERR             | 0.000894258863834524              | mag correction error                        |            | f32   | csst_ms_mbi_photometry   |
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### HDU1

#### Header

## File: *_psf.fits

### File contents

| HDU  | data                    | note       |
|------|-------------------------|------------|
| HDU0 | None                    | PrimaryHDU |
| HDU1 | Table                   | ImageHDU   |

### HDU0

#### Header
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| keyword | value | comment        | fill value    | type | module           |
|---------|:------|----------------|---------------|------|------------------|
| SIMPLE  | True  | Fits standard  | True          | bool | csst_ooc_psf_mbi |
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### HDU1

#### Header of `csst_ooc_psf_mbi`
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| keyword    | value        | comment                                       | fill value | type  | module             |
|------------|:-------------|-----------------------------------------------|------------|-------|--------------------|
| LOADED     | 579          | Number of loaded sources                      |            | I8    | csst_ooc_psf_mbi   |
| ACCEPTED   | 573          | Number of accepted sources                    |            | I8    | csst_ooc_psf_mbi   |
| CHI2       | 1.12832649   | Final reduced chi2                            |            | f32   | csst_ooc_psf_mbi   |
| POLNAXIS   | 2            | Number of context parameters                  |            | I8    | csst_ooc_psf_mbi   |
| POLGRP1    | 1            | Polynom group for this context parameter      |            | I8    | csst_ooc_psf_mbi   |
| POLNAME1   | 'XWIN_IMAGE' | Name of this context parameter                |            | Str   | csst_ooc_psf_mbi   |
| POLZERO1   | 4607.403434  | Offset value for this context parameter       |            | f32   | csst_ooc_psf_mbi   |
| POLSCAL1   | 9161.359825  | Scale value for this context parameter        |            | f32   | csst_ooc_psf_mbi   |
| POLGRP2    | 1            | Polynom group for this context parameter      |            | I8    | csst_ooc_psf_mbi   |
| POLNAME2   | 'YWIN_IMAGE' | Name of this context parameter                |            | Str   | csst_ooc_psf_mbi   |
| POLZERO2   | 4631.62895   | Offset value for this context parameter       |            | f32   | csst_ooc_psf_mbi   |
| POLSCAL2   | 9174.347872  | Scale value for this context parameter        |            | f32   | csst_ooc_psf_mbi   |
| POLNGRP    | 1            | Number of context groups                      |            | I8    | csst_ooc_psf_mbi   |
| POLDEG1    | 2            | Polynom degree for this context group         |            | I8    | csst_ooc_psf_mbi   |
| PSF_FWHM   | 2.31607056   | PSF FWHM in image pixels                      |            | f32   | csst_ooc_psf_mbi   |
| PSF_SAMP   | 0.49278098   | Sampling step of the PSF data in image pixels |            | f32   | csst_ooc_psf_mbi   |
| PSFNAXIS   | 3            | Dimensionality of the PSF data                |            | I8    | csst_ooc_psf_mbi   |
| PSFAXIS1   | 71           | Number of element along this axis             |            | I8    | csst_ooc_psf_mbi   |
| PSFAXIS2   | 71           | Number of element along this axis             |            | I8    | csst_ooc_psf_mbi   |
| PSFAXIS3   | 6            | Number of element along this axis             |            | I8    | csst_ooc_psf_mbi   |
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#### Header of `csst_ooc_psf_strategy_crds`
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| keyword    | value                 | comment                                                                                                                                | fill value | type   | module                       |
|------------|-----------------------|----------------------------------------------------------------------------------------------------------------------------------------|------------|--------|------------------------------|
| USEAFTER   | '2028-07-22T18:52:33' | date and time after the reference files will be used. (YYYY-MM-DDThh:mm:ss)                                                            |            | str    | csst_ooc_psf_strategy_crds   |
| OBSSTART   | '2028-07-22T18:52:33' | UTC date and time of start of first observation (YYYY-MM-DDThh:mm:ss)                                                                  |            | str    | csst_ooc_psf_strategy_crds   |
| OBSEND     | '2028-07-23T17:54:27' | UTC date and time of end of last observation (YYYY-MM-DDThh:mm:ss)                                                                     |            | str    | csst_ooc_psf_strategy_crds   |
| EXPTYPE    | 'SCI'                 | type of exposes used to create the reference file ('SCI'or 'OOC')                                                                      |            | str    | csst_ooc_psf_strategy_crds   |
| COMBINE_N  | 135                   | number of exposes used to create the reference file.                                                                                   |            | I8     | csst_ooc_psf_strategy_crds   |
| BREAPHAS   | 'hot'                 | phase of breathing effect, which is the focus varies over orbital time <br> scales due to thermal changes. ('hot', 'cold'. 'none')     |            | str    | csst_ooc_psf_strategy_crds   |
| TEMP_PM    | 20.72563452           | average temperature surrounding the primary mirror (in K)                                                                              |            | f32    | csst_ooc_psf_strategy_crds   |
| TEMP_SM    | 20.72563452           | average temperature surrounding the secondary mirror (in K)                                                                            |            | f32    | csst_ooc_psf_strategy_crds   |
| TEMP_TM    | 20.72563452           | average temperature surrounding the tertiary mirror (in K)                                                                             |            | f32    | csst_ooc_psf_strategy_crds   |
| LFOCUST    | '2028-07-22T18:52:33' | last focus (AM1 or AM2) time (YYYY-MM-DDThh:mm:ss)                                                                                     |            | str    | csst_ooc_psf_strategy_crds   |
| P1_FOCUS   | 28025.63452           | parameter 1 of focal length calculated from the positions ofthe focus <br> adjustment mechanism (FAM) and the secondary mirror (in mm) |            | f32    | csst_ooc_psf_strategy_crds   |
| P2_ FOCUS  | 28025.63452           | parameter 2 of focal length (in mm)                                                                                                    |            | f32    | csst_ooc_psf_strategy_crds   |
| P3_ FOCUS  | 28025.63452           | parameter 3 of focal length (in mm)                                                                                                    |            | f32    | csst_ooc_psf_strategy_crds   |
| P4_ FOCUS  | 28025.63452           | parameter 4 of focal length (in mm)                                                                                                    |            | f32    | csst_ooc_psf_strategy_crds   |
| P5_ FOCUS  | 28025.63452           | parameter 5 of focal length (in mm)                                                                                                    |            | f32    | csst_ooc_psf_strategy_crds   |
| P6_ FOCUS  | 28025.63452           | parameter 6 of focal length (in mm)                                                                                                    |            | f32    | csst_ooc_psf_strategy_crds   |
| FSM_STAT   | T                     | working state of fast-steering mirror (FSM)                                                                                            |            | bool   | csst_ooc_psf_strategy_crds   |
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#### Header of `csst_ms_mbi_astrometry`
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| keyword           | value                 | comment                                                                                                             | fill value             | type   | module                    |
|-------------------|:----------------------|---------------------------------------------------------------------------------------------------------------------|------------------------|--------|---------------------------|
| *STA_CCRS CCRSCAL | 0                     | Completion degree of relative astrometric solution in CCRS                                                          | 1                      | i8     | csst_ms_mbi_astrometry    |
| *VER_CCRS CCRSVE  | "v2023.01"            | Version of CSST relative Astrometry soft in CCRS                                                                    | "v2023.01"             | str    | csst_ms_mbi_astrometry    |
| CCRSGATE          | "  "                  | Camera shutter information                                                                                          | "   "                  | str    | csst_ms_mbi_astrometry    |
| CCRSCONF          | "  "                  | Configuration file for astrometry                                                                                   | "   "                  | str    | csst_ms_mbi_astrometry    |
| CCRSIM            | " mormal"             | Image classification for CSST Astrometry                                                                            | " normal "             | str    | csst_ms_mbi_astrometry    |
| CCRSTM            | 2023:02:03-12:03:04   | Time of last CSST Astrometry in CCRS                                                                                | 2023:02:03-12:03:04    | str    | csst_ms_mbi_astrometry    |
| CCRSREF           | "Gaia dr3 v01"        | Reference Catalogue for CSST Astrometry in CCRS                                                                     | "Gaia dr3 v01"         | str    | csst_ms_mbi_astrometry    |
| CCRSHIS           | 1                     | Astrometric solution Record for CCRS                                                                                | 1                      | i8     | csst_ms_mbi_astrometry    |
| DELT_RA           | 0.3                   | The difference between the initial central RA and the measured central RA for CCRS in unit degree                   | 361                    | f32    | csst_ms_mbi_astrometry    |
| DELT_DEC          | 0.3                   | The difference between the initial central DEC and the measured central DEC for CCRS in unit degree                 | 181                    | f32    | csst_ms_mbi_astrometry    |
| DELT_PS           | 0.3                   | The difference between the the initial pixelscale and the measured pixelscale  for CCRS in unit arcsecond per pixel | 99999                  | f32    | csst_ms_mbi_astrometry    |
| CCDALCE           | 3468                  | CCD Centroid   along  coordinate for CCRS                                                                           | 3345                   | f32    | csst_ms_mbi_astrometry    |
| CCDALCEE          | 3                     | CCD Centroid   along coordinate Error for CCRS                                                                      | 9999                   | f32    | csst_ms_mbi_astrometry    |
| CCDACCE           | 3468                  | CCD Centroid   along  coordinate for CCRS                                                                           | 3345                   | f32    | csst_ms_mbi_astrometry    |
| CCDACCEE          | 3                     | CCD Centroid   across  coordinate Error for CCRS                                                                    | 9999                   | f32    | csst_ms_mbi_astrometry    |
| CCD_ROW           | 2                     | CCD Row for CCRS                                                                                                    | 2                      | i8     | csst_ms_mbi_astrometry    |
| CCD_COL           | 2                     | CCD Column for CCRS                                                                                                 | 2                      | i8     | csst_ms_mbi_astrometry    |
| CEQUINOX          | 2000                  | Reference epoch for CCRS                                                                                            | 2000                   | f32    | csst_ms_mbi_astrometry    |
| CRADESYS          | "CCRS"                | Reference coordinate system for CCRS                                                                                | "CCRS"                 | str    | csst_ms_mbi_astrometry    |
| C_CTYPE1          | 'RA---TPV'            | WCS projection type for this axis                                                                                   | 'RA---TPV'             | str    | csst_ms_mbi_astrometry    |
| C_CTYPE2          | 'DEC--TPV'            | WCS projection type for this axis                                                                                   | 'DEC--TPV'             | str    | csst_ms_mbi_astrometry    | 
| C_CUNIT1          | 'deg     '            | Axis unit                                                                                                           | 'deg     '             | str    | csst_ms_mbi_astrometry    |
| C_CUNIT2          | 'deg     '            | Axis unit                                                                                                           | 'deg     '             | str    | csst_ms_mbi_astrometry    |
| C_CRVAL1          | 9.030599852245E+01    | World coordinate on this axis                                                                                       | Read from level 0 data | f32    | csst_ms_mbi_astrometry    |
| C_CRVAL2          | 2.438488373039E+01    | World coordinate on this axis                                                                                       | Read from level 0 data | f32    | csst_ms_mbi_astrometry    | 
| C_CRPIX1          | 4.694923673820E+03    | Reference pixel on this axis                                                                                        | Read from level 0 data | f32    | csst_ms_mbi_astrometry    |
| C_CRPIX2          | 4.619541250822E+03    | Reference pixel on this axis                                                                                        | Read from level 0 data | f32    | csst_ms_mbi_astrometry    |
| C_CD1_1           | -8.151272405944E-06   | Linear projection matrix                                                                                            | Read from level 0 data | f32    | csst_ms_mbi_astrometry    |
| C_CD1_2           | -1.872449650544E-05   | Linear projection matrix                                                                                            | Read from level 0 data | f32    | csst_ms_mbi_astrometry    |
| C_CD2_1           | 1.876564643792E-05    | Linear projection matrix                                                                                            | Read from level 0 data | f32    | csst_ms_mbi_astrometry    |
| C_CD2_2           | -8.133840508591E-06   | Linear projection matrix                                                                                            | Read from level 0 data | f32    | csst_ms_mbi_astrometry    |
| C_PV1_0           | 5.170560041120E-06    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_1           | 9.998597063949E-01    | Projection distortion parameter                                                                                     | 1                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_2           | -2.639332324050E-05   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_4           | -2.036180144002E-03   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_5           | -9.700979957371E-03   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_6           | 2.985621009586E-03    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_7           | 1.352911042189E-02    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_8           | -2.059801280272E-02   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_9           | 1.720680837477E-02    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_10          | 9.773972553669E-03    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_12          | -1.447093954841E-01   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_13          | 3.877149836968E-01    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_14          | -5.851518938865E-01   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_15          | 3.482309631134E-01    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV1_16          | -2.183057017500E-01   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_0           | 1.728529121022E-05    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_1           | 9.999804628736E-01    | Projection distortion parameter                                                                                     | 1                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_2           | -6.335240164790E-05   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_4           | -5.966442744430E-03   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_5           | 6.203002956354E-03    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_6           | -3.553022699090E-03   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_7           | -3.813262941731E-03   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_8           | 5.844942621588E-02    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_9           | 4.675092996504E-03    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_10          | -7.886221100639E-03   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_12          | 3.250659874395E-01    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_13          | -4.054835390976E-01   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_14          | 7.550500477228E-01    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_15          | -2.401706541249E-02   | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_PV2_16          | 3.205340695247E-01    | Projection distortion parameter                                                                                     | 0                      | f32    | csst_ms_mbi_astrometry    |
| C_IRMS1           | 0.000000000000E+00    | Astrom. dispersion RMS (intern., high S/N)                                                                          | 9999                   | f32    | csst_ms_mbi_astrometry    | 
| C_IRMS2           | 0.000000000000E+00    | Astrom. dispersion RMS (intern., high S/N)                                                                          | 9999                   | f32    | csst_ms_mbi_astrometry    |
| C_RRMS1           | 6.458653303335E-06    | Astrom. dispersion RMS (ref., high S/N)                                                                             | 9999                   | f32    | csst_ms_mbi_astrometry    |
| C_RRMS2           | 8.724734011714E-06    | Astrom. dispersion RMS (ref., high S/N)                                                                             | 9999                   | f32    | csst_ms_mbi_astrometry    |