diff --git a/csst_ms_sls2d.md b/csst_ms_sls2d.md
index 24e18ae157c909c856ff1272c9f5e1bedc07e1c7..a0f32560052c293a9f8815cc5683f3bba1a50c44 100644
--- a/csst_ms_sls2d.md
+++ b/csst_ms_sls2d.md
@@ -7,8 +7,8 @@
 | HDU  | data                    | note       |
 | ---- | ----------------------- | ---------- |
 | HDU0 | None                    | PrimaryHDU |
-| HDU1 | reduced image (9k x 9k) | ImageHDU   |
-| HDU2 | reduced error (9k x 9k) | ImageHDU   |
+| HDU1 | reduced SCI (9k x 9k)   | ImageHDU   |
+| HDU2 | reduced ERR (9k x 9k)   | ImageHDU   |
 | HDU3 | reduced DQ (9k x 9k)    | ImageHDU   |
 
 ### HDU0
@@ -23,6 +23,19 @@
 
 | keyword  | value                 | comment                                        | fallback_value | type | module                 |
 | -------- | :-------------------- | ---------------------------------------------- | -------------- | ---- | ---------------------- |
+| INST_V   | '0.0.1 '              | instrument correction pipeline version         |                | str  | csst_ms_sls_instrument |
+| INST_TOL | '2022-12-30T10:18:53' | Time of last modification                      |                | str  | csst_ms_sls_instrument |
+| DATASUM  | '1352015684'          | Integrity check of data records                |                | str  | csst_ms_sls_instrument |
+| NGOODPIX | 84794368              | number of good pixels                          |                | f32  | csst_ms_sls_instrument |
+| SDQFLAGS | 31743                 | serious data quality flags                     |                | i16  | csst_ms_sls_instrument |
+| GOODMAX  | 260.0                 | maxmum value of good pixels                    |                | f32  | csst_ms_sls_instrument |
+| GOODMIN  | -0.001                | minmum value of good pixels                    |                | f32  | csst_ms_sls_instrument |
+| GOODMEAN | 0.3                   | mean value of good pixels                      |                | f32  | csst_ms_sls_instrument |
+| SNRMIN   | 187.4                 | minmum signal to noise of good pixels          |                | f32  | csst_ms_sls_instrument |
+| SNRMAX   | 1.2                   | maxmum signal to noise of good pixels          |                | f32  | csst_ms_sls_instrument |
+| SNRMEAN  | 3.38                  | average of the dark values subtracted          |                | f32  | csst_ms_sls_instrument |
+| BUNIT    | electrons/s           | brightness units                               |                | str  | csst_ms_sls_instrument |
+| EXTNAEM  | SCI                   | extension name                                 |                | str  | csst_ms_sls_instrument |
 
 
 #### Header of `csst_ms_sls_position`