data_model.md

# L1-MBI Data model

## File: *_{img/wht/flg}_L1_1.fits

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


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

### HDU1

#### Header of `csst_ms_mbi_instrument`
| keyword     | value                 | comment                                         | fallback_value        | type | module                  |
|-------------|:----------------------|-------------------------------------------------|-----------------------|------|-------------------------|
| *L1STATBIAS | 0                     | Status flag for bias frame correction           | 1                     | i8   | csst_ms_mbi_instrument  |
| *L1STATDA   | 0                     | Status flag for dark frame correction           | 1                     | i8   | csst_ms_mbi_instrument  |
| *L1STATFL   | 0                     | Status flag for flat frame correction           | 1                     | i8   | csst_ms_mbi_instrument  |
| *SKY_RMS    | 10.0                  | *Standard dev of frame background (ADU) -> e-/s | -99                   | f32  | csst_ms_mbi_instrument  |        
| *SKY        | 0.1                   | Estimated sky brightness (e-/s per pixel)       | -99                   | f32  | csst_ms_mbi_instrument  |
| SATURATE    | 1833.333333333333     | The flux limit of saturated pixel (e-/s)        | -99                   | f32  | csst_ms_mbi_instrument  |
| HASCTE      | *T                    | Has CTE correction                              | F                     | bool | csst_ms_mbi_instrument  |
| HASSAT      | *T                    | Has satellite correction                        | F                     | bool | csst_ms_mbi_instrument  |
| HASCR       | *T                    | Has cosmic rays mask                            | F                     | bool | csst_ms_mbi_instrument  |
| CRCOUNT     | 66791                 | Cosmic rays counts                              | -99                   | i8   | csst_ms_mbi_instrument  |
| VER_INST    | '0.0.1   '            | Version of instrument processing                | '0.0.1   '            | str  | csst_ms_mbi_instrument  |
| *TOL_INST   | '2022-12-30T10:18:53' | Time of last modification                       | '2022-12-30T10:18:53' | str  | csst_ms_mbi_instrument  |
| STA_DIST    | 0                     | 0=done 1=wrong                                  | 1                     | i8   | csst_ms_mbi_distortion  | 
| DATASUM     | '1352015684'          | *data unit checksum updated 2022-10-28T19:29:10 | '1352015684'          | str  | csst_ms_mbi_instrument  |

#### Header of `csst_ms_mbi_distortion`

| keyword           | value                     | comment                                | fallback_value        | type | module                 |
|-------------------|:--------------------------|----------------------------------------|-----------------------|------|------------------------|
| *RADESYS          | 'ICRS    '                | Should be always 'ICRS'                | 'ICRS'                | str  | csst_ms_mbi_distortion |
| *NS_DIST STAR_FIT | 11                        | The number of stars used in fitting    | 0.0                   | i8   | csst_ms_mbi_distortion | 
| PV1_0             | 0.003205383944913964      |                                        | 1.0                   | f32  | csst_ms_mbi_distortion |
| PV1_1             | 0.8673020820536499        |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV1_2             | -0.2011989871377834       |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV1_3             | -0.2597214229472611       |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV1_4             | 0.4353828741811097        |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV1_5             | -0.5054216569802673       |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV1_6             | 0.1951474426617432        |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV2_0             | 0.00109803885992697       |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV2_1             | 0.9171065857705857        |                                        | 1.0                   | f32  | csst_ms_mbi_distortion |
| PV2_2             | -0.04908256792722099      |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV2_3             | -0.09860562038448289      |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV2_4             | 0.07961855240788976       |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV2_5             | -0.2009224365497067       |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| PV2_6             | 0.1741954691884874        |                                        | 0.0                   | f32  | csst_ms_mbi_distortion |
| RA_OFF            | -0.0                      | mas in unit                            | -99                   | f32  | csst_ms_mbi_distortion |
| DEC_OFF           | 0.0                       | mas in unit                            | -99                   | f32  | csst_ms_mbi_distortion |
| RA_RMS            | 127.1                     | mas in unit                            | -99                   | f32  | csst_ms_mbi_distortion |
| DEC_RMS           | 60.4                      | mas in unit                            | -99                   | f32  | csst_ms_mbi_distortion |
| RA_CEN            | 192.1940713422841         | The center of detector in ra           | 192.1940713422841     | f32  | csst_ms_mbi_distortion |
| DEC_CEN           | 26.72643742371229         | The center of detector in dec          | 26.72643742371229     | f32  | csst_ms_mbi_distortion |
| VER_DIST          | '1.0     '                | Version of distortion                  | '1.0'                 | str  | csst_ms_mbi_distortion |
| *TOL_DIST         | '2022-12-29T16:36:47'     | Time of last modification              | '2022-12-29T16:36:47' | str  | csst_ms_mbi_distortion |
| STA_DIST          |                   0       | 0=done 1=wrong                         | 1                     | i8   | csst_ms_mbi_distortion | 

#### Header of `csst_ms_mbi_position`

| keyword    | value                       | comment                                    | fallback_value | type | module                  |
|------------|:----------------------------|--------------------------------------------|----------------|------|-------------------------|
| RADESYS    | 'ICRS    '                  | should be always 'ICRS'                    | 'ICRS'         | str  | csst_ms_mbi_position    |                             
| PV1_0      | -7.032303876526E-04         |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV1_1      | 9.986639936274E-01          |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV1_2      | -3.506141592607E-03         |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV1_4      | -2.342575913122E-03         |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV1_5      | -2.216829433925E-03         |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV1_6      | -5.122207406521E-03         |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV2_0      | -6.939462894407E-04         |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV2_1      | 9.988294486003E-01          |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV2_2      | -1.687802061938E-03         |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV2_4      | 1.561587727533E-03          |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV2_5      | -4.159618376671E-03         |                                            | 0              | f32  | csst_ms_mbi_position    |
| PV2_6      | 3.398895060382E-03          |                                            | 0              | 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    |
| *WCS_S     | 0                           | 0=done                                     |                | i8   | csst_ms_mbi_position    | 
| *WCS_V     | '2.0.4   '                  | Version of WCS calibration                 |                | str  | csst_ms_mbi_position    |        
| *WCS_P     | 'default.scamp'             | Configure file name of WCS                 |                | str  | csst_ms_mbi_position    |                    
| *WCS_TOL   | '2022-12-30 18:32:46 PM'    | Time of last wcs calibration               |                | str  | csst_ms_mbi_position    |             

#### Header of `csst_ms_mbi_flux`

| keyword            | value                 | comment                                        | fallback_value               | type | module             |
|--------------------|:----------------------|------------------------------------------------|------------------------------|------|--------------------|
| *REF_FLUX CALI_REF | 'GAIA    '            | the reference database for calibration         | 'GAIA'                       | str  | csst_ms_mbi_flux   |
| ZP                 | 23.8435               | photometric zero point in magnitude            | -1                           | f32  | csst_ms_mbi_flux   |
| ZPRMS              | 0.0101                | zpt rms of the matched objects                 | -1                           | f32  | csst_ms_mbi_flux   |                
| APER_R             | 10                    | (pixels) photo-aperture radius                 | 10                           | i8   | csst_ms_mbi_flux   |            
| FWHM               | 2.147                 | FWHM in pixel                                  | -1                           | f32  | csst_ms_mbi_flux   |
| *RA_OFF            | -0.188                | median positional offset from GAIA, in arcsec  | -1                           | f32  | csst_ms_mbi_flux   |
| *DEC_OFF           | -0.1061               | median positional offset from GAIA, in arcsec  | -1                           | f32  | csst_ms_mbi_flux   | 
| *NS_FLUX           | 49                    | total number of stars detected                 | 0                            | i8   | csst_ms_mbi_flux   | 
| *NS_MATCH          | 25                    | total number of matched stars in 2 arcsec      | -1                           | i8   | csst_ms_mbi_flux   |
| *MED_CLR           | 0.0                   | median (BP-RP)_GAIA of matched stars           | 0.0                          | f32  | csst_ms_mbi_flux   |
| *SKY1              | 0.0359                | (e-/s per pixel)                               | 0.0359                       | f32  | csst_ms_mbi_flux   |                 
| *SKY_RMS1          | 0.1766                | rms/pixel of the sky in unit of e-/s           | 0.1766                       | f32  | csst_ms_mbi_flux   | 
| *MAG_LIM           | 21.83                 | magnitude limiting of 5-sigma galaxy detection | -1                           | f32  | csst_ms_mbi_flux   | 
| *STA_FLUX FLUX_S   | 0                     | flux calibration status                        | 1                            | i8   | csst_ms_mbi_flux   |                       
| *VER_FLUX FLUX_V   | '1.3     '            | version of calibration code                    | '1.3'                        | str  | csst_ms_mbi_flux   |
| *STM_FLUX FLUX_TOL | '2022-12-30 18:36:05' | flux calibration operation time                | '2022-12-30 18:36:05'        | str  | csst_ms_mbi_flux   |

#### Header of `csst_ms_qc0 qc0 check`
| keyword   | value   | comment                                       | fallback_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   | 

#### Header of `csst_ms_qc0 qc1 check`
| keyword  | value     | comment                 | fallback_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   |


## File: *_cat.fits

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

### HDU0

#### Header of photometry
| keyword   | value                     | comment                       | fallback_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 |        

### HDU1

#### Header

## File: *_psf.fits

### File contents

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

### HDU0

#### Header

| keyword | value | comment       | fallback_value | type | module           |
|---------|:------|---------------|----------------|------|------------------|
| SIMPLE  | True  | Fits standard | True           | bool | csst_ooc_psf_mbi |  

### HDU1

#### Header of `csst_ooc_psf_mbi`

| keyword  | value        | comment                                       | fallback_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 |

#### Header of `csst_ooc_psf_strategy_crds`

| keyword   | value                 | comment                                                                                                                                | fallback_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 |
#### Header of `csst_ms_mbi_astrometry`

| keyword           | value               | comment                                                                                                             | fallback_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    |