• All these parameters have a default value in 4SM:
  • each of them is optional
• Any of them may be specified,
  • in whatever order

• -Z/MSLHtided/CSL/VIMin/ZMAX/CoefDZ/GSL/N_8/CoefZ
• -Z//MSL-1.4D/Zplus/1.19/0.0/1.0/GSL/N(n)_8/1.2
• -Z/CD3.2D/1.19/0.0/1.0/gSL_1_3/N(n)_8/1.0
• -Z(z)+(-)d/1.19/0/0.0/1.0/PAN_1_3/N(n)_8/1.2
• -Z/HYDRO2.3d/CSL1.18/ZMax0.00/coefDZ1.0/gSL_1_4/SIG_4w5/N_1/coefZ1.0001
• -Z/MSL0.00d/N_2/RLBgb1.330_0.500/PAN_1_7/cZ1

• /MSL-1.4.............Mean sea level
• /CD3.2................Chart datum
• /HYDRO2.3..........Hydrographic zero
• /LAT2.0...............Lower astronomical tide

• In a Red vs NIR bidimensional histogram, 
  • the scatter of bare land pixels is averaged to a straight line
  • which we call the Soil Line
• This straight line runs through
  • the Path radiance La and
  • the Maximum shallow bottom radiance LsM 
  • with a slope and an intercept
• The scatter of bare land pixels in confined inside a cone
• Shallow.......pixels plot on the RED...side of that cone: the limit is slope*cSL
• Vegetated....pixels plot on the NIR...side of that cone: the limit is slope/cSL
• A value of cSL=1.18 is usually suitable
  • although it may be modified in the -Z...argument as required

• .../PAN_1_4      
  • metZ=7......Z is computed in Pmode  from band=FirstP   to   band=LastP
  • this is the default
  • FirstP and LastP specify the range of bands to be used
  • bands outside this range are skipped
• .../RLN_m0_m1  
  • metZ=6.....Stumpf et al's ratio log method
  • in 4SM, m0 ~=1
  • in 4SM, m1 must be estimated using the results obtained in the PANmode
• see tmnov tutorial

SIGNATURE
(not in use any more, replaced by /RLBgb....)
........../SIG_4w5/............

/SIG_4w5

/S(s)IG_3 for using the bottom signature for a reference spectral soil line, starting with FirstSIG-1

W(w)5 a weighing feature (not in use)

This involves a learning process about the actual spectral soil line

• NDRflag             default=0
• chS16_NDR       channel to write NDR
• coefNDR            default =1
• Z(z)DTMflag      default ZDTMflag=0      to apply ZDTM for water column correction

• /n_8               default            Negflag=0....................negative bottom contrast is disabled
• /N_8                                     Negflag=1....................negative bottom contrast is enabled
  • ChNegMin=8
  • to enable negative bottom contrast in the range of bands_1_ to_8 

• .../coefZ1.0001
• all K values are divided by CoefZ:
  • in other words all retrieved depths are multiplied by coefZ
• default value is 1.00000000000
• any value not equal to 1 shall be enabled

• default Mask=0   no mask is applied
• .../Mask_4 
  • shall only process pixels which are under mSE=4
  • all other pixels are left untouched - actually are replicated
• see tmnov tutorial