tune_nemo.md

 
 * [Tune NEMO](#tune-nemo)
+    * [Namelist key](#tune-nemo-namelist-key)
     * [Tuning config](#tune-nemo-tuning-config)
     * [Set diags](#tune-nemo-set-diags) 
-
+    * 
 
 
 <a name="tune-nemo"></a>
@@ -10,10 +11,27 @@
 ## Tune NEMO
 
 
+<a name="tune-nemo-namelist-key"></a>
+========================
+#### Some description of namelist keys
+
+| section available | some keys | description  | dependency |
+|:---:|:---:|:---:|:---:|
+| namdom | ln_linssh | linear free surface e3 before, now and after are set equal one for all, and we use exactly the same calculation as in non-linear case (except that update of e3 at each time-step is by-passed)  |  | 
+|  | rn_dt  | time step | can be multiple of 86400s : 900 960 1080 1152 1200 1350 1440 1600 1800 |
+
+
+
+
+
 <a name="tune-nemo-tuning-config"></a>
 ========================
 #### Some Tuning for your config
 
+_Linear free surfaces_:
+linear free surface (constant volume) case : e3 before, now and after are set equal one for all, and we use exactly the same calculation as in non-linear case (except that update of e3 at each time-step is by-passed)
+
+
 
 _VVL_:
 
@@ -65,7 +83,7 @@ _Tides Diags_:
            ln_diaharm = .true.   ! Choose tidal harmonic output or not
              nit000_han = NIT000    !    First time step used for harmonic analysis
              nitend_han = NITEND   !    Last time step used for harmonic analysis
-             nstep_han  = 8     !    Time step frequency for harmonic analysis
+             nstep_han  = 8     ! (20min / ts 150s)   Time step frequency for harmonic analysis
            tname(1)   = 'M2'   !    Name of tidal constituents
            tname(2)   = 'K1'   !              ---