diff --git a/csst_ms_mbi_img_L1_fits.md b/csst_ms_mbi_img_L1_fits.md
index 4f8a3db7483b94cc9827dc5fcd053ae7f0f088e8..89c05851b70da78d3ca3a979d0cea317425ad559 100644
--- a/csst_ms_mbi_img_L1_fits.md
+++ b/csst_ms_mbi_img_L1_fits.md
@@ -16,11 +16,11 @@
 ### Header of instrument
 | keyword   | value                     | comment                       | fallback_value | type | module                  |
 |-----------|:--------------------------|-------------------------------|----------------|------|-------------------------|
-|SATURATE   | 1833.333333333333         |                                                |                | f32  |csst_ms_mbi_instrument   |         
-|CRCOUNT    | 66791                     |                                                |                | i8   |csst_ms_mbi_instrument   |
-|INST_V     | '0.0.1   '                |                                                |                | str  |csst_ms_mbi_instrument   |
-|INST-TOL   | '2022-12-30T10:18:53'     | Time of last modification                      |                | str  |csst_ms_mbi_instrument   |
-|DATASUM    | '1352015684'              | data unit checksum updated 2022-10-28T19:29:10 |                | str  |csst_ms_mbi_instrument   |
+|SATURATE   | 1833.333333333333         |                                                |                | f32  | csst_ms_mbi_instrument   |         
+|CRCOUNT    | 66791                     |                                                |                | i8   | csst_ms_mbi_instrument   |
+|INST_V     | '0.0.1   '                |                                                |                | str  | csst_ms_mbi_instrument   |
+|INST-TOL   | '2022-12-30T10:18:53'     | Time of last modification                      |                | str  | csst_ms_mbi_instrument   |
+|DATASUM    | '1352015684'              | data unit checksum updated 2022-10-28T19:29:10 |                | str  | csst_ms_mbi_instrument   |
 
 ### Header of distortion
 
@@ -60,4 +60,21 @@
 
 | keyword   | value                     | comment                       | fallback_value | type | module                  |
 |-----------|:--------------------------|-------------------------------|----------------|------|-------------------------|
+| CALI_REF  | 'GAIA    '                | the reference database for calibration        |     | str  | csst_ms_mbi_flux   |
+| ZP        |             23.8435       | photometric zero point in magnitude           |     | f32  | csst_ms_mbi_flux   |
+| ZPRMS     |             0.0101        | zpt rms of the matched objects                |     | f32  | csst_ms_mbi_flux   |                
+| APER_R    |                 10        | (pixels) photo-aperture radius                |     | i8   | csst_ms_mbi_flux   |            
+| FWHM      |                2.147      | FWHM in pixel                                 |     | f32  | csst_ms_mbi_flux   |
+| RAOFF     |             -0.188        | median positional offset from GAIA, in arcsec |     | f32  | csst_ms_mbi_flux   |
+| DECOFF    |            -0.1061        | median positional offset from GAIA, in arcsec |     | f32  | csst_ms_mbi_flux   | 
+| NSTAR     |                 49        | total number of stars detected                |     | i8   | csst_ms_mbi_flux   | 
+| NMATCH    |                 25        | total number of matched stars in 2 arcsec     |     | i8   | csst_ms_mbi_flux   |
+| MDNCOL    |                0.0        | median (BP-RP)_GAIA of matched stars          |     | f32  | csst_ms_mbi_flux   |
+| SKY       |             0.0359        | (e-/s per pixel)                              |     | f32  | csst_ms_mbi_flux   |                 
+| SKYRMS    |             0.1766        | rms/pixel of the sky in unit of e-/s          |     | f32  | csst_ms_mbi_flux   | 
+| MLIM      |              21.83        | magnitude limiting of 5-sigma galaxy detection|     | f32  | csst_ms_mbi_flux   | 
+| FLUX_S    |                  0        | flux calibration status                       |     | i8   | csst_ms_mbi_flux   |                       
+| FLUX_V    |  '1.3     '               | version of calibration code                   |     | str  | csst_ms_mbi_flux   |
+| FLUX_TOL= |  '2022-12-30 18:36:05'    | flux calibration operation time               |     | str  | csst_ms_mbi_flux   |
+