# 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 |
|------------|:--------------------------|------------------------------------------------|-----------------------|------|-------------------------|
| L1STATBI | 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 |
| L1SIGMA | 10.0 | Standard dev of frame background (ADU) | -99 | f32 | csst_ms_mbi_instrument |
| L1SKY | 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| |
| 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 |
|-----------|:--------------------------|-------------------------------|----------------|------|-------------------------|
| 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 |
| RAOFF | -0.188 | median positional offset from GAIA, in arcsec | -1 | f32 | csst_ms_mbi_flux |
| DECOFF | -0.1061 | median positional offset from GAIA, in arcsec | -1 | f32 | csst_ms_mbi_flux |
| NSTAR | 49 | total number of stars detected | 0 | i8 | csst_ms_mbi_flux |
| NMATCH | 25 | total number of matched stars in 2 arcsec | -1 | i8 | csst_ms_mbi_flux |
| MDNCOL | 0.0 | median (BP-RP)_GAIA of matched stars | 0.0 | f32 | csst_ms_mbi_flux |
| SKY | 0.0359 | (e-/s per pixel) | 0.0359 | f32 | csst_ms_mbi_flux |
| SKYRMS | 0.1766 | rms/pixel of the sky in unit of e-/s | 0.1766 | f32 | csst_ms_mbi_flux |
| MLIM | 21.83 | magnitude limiting of 5-sigma galaxy detection| -1 | f32 | csst_ms_mbi_flux |
| FLUX_S | 0 | flux calibration status | 1 | i8 | csst_ms_mbi_flux |
| FLUX_V | '1.3 ' | version of calibration code | '1.3' | str | csst_ms_mbi_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 validation | 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 |
| QC0_S | 0 | QC0 Status (0/non-zero) | > 0 | 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 |
|------------|:--------------------------|------------------------------------------------|-----------------------|------|-------------------------|
| QC1_S | 0 | QC1 Status (0/non-zero) | 1 | int | csst_ms_qc0 |
| PROC_S | 0 | L1 Pipeline Status | 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
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
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 |