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'''Function and Definition'''
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'''Evaluate N1:''' This function takes several input to determine the best choice for [[N1|N1]] (the number of layers to be run in the model) to create seasonal skin depth stability. It is activated when the parameter [[thick|thick]] is used.
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'''Input Arguments'''
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Start davinci as normal.

 >davinci
 dv>

Type the function into davinci without any input parameters to bring up help menu for this function.

 dv> evalN1_krc()
  Calculates the minimum number of layers required given the number of years the model runs
  Return an integer
  $1  = RLAY, Layer thickness ratio
  $2  = FLAY, First layer thickness (in skin depths)
  $3  = INERTIA, Surface material thermal inertia
  $4  = SPEC_HEAT, Surface material specific heat
  $5  = DENSITY, surface material density
  $6  = DELJUL, delta julian date to increment by (Default = 1.9083
  $7  = N5, number of "seasons" to run (Default = 1080)
  $8  = JDISK, start "season" to output (Default = 721)
  $9  = MAXN1, Maximum number of layers KRC can accept
  $10 = PERIOD, Length of solar day in days (of 86400 seconds)
  $11 = INERTIA2, bottom material thermal inertia
  $12 = SpHeat2, bottom material specific heat
  $13 = DENS2, bottom material density
  $14 = Top Material Thickness in m
 s.piqueux 5/5/14

These are all the input parameters used for the function. You ''must'' include all 14 parameters, even the parameters that say they use a default.</div>
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'''Output'''
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The purpose of the function is to output the number of layers needed to create model stability if a thickness of the upper material is declared.

This function is called automatically when [[thick|thick]] is used, however, you can input all values in the function yourself and see

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'''Examples'''
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Start davinci as normal.

 >davinci
 dv>

Type the function into davinci with your desired input parameters. You can not include the parameter names, Davinci will only accept a list of values. But hey must be in the correct order.

 dv> evalN1_krc(1.2,.18,50,595,1000,1.9083,1440,1080,50,1.0275,300,674,2500,.007)
 struct, 8 elements
     req: struct, 4 elements
         FLAY: 0.1134460494   
         RLAY: 1.200000048   
         IC: 5.000000000   
         N1: 33.00000000   
     DSD1: 0.01412622258   
     DSD2: 0.02992914990   
     SSD1: 0.3657733798   
     SSD2: 0.7749620080   
     Depth: 3.091261148   
     top: 1x33x1 array of float, bsq format [132 bytes]
     thick: 1x33x1 array of float, bsq format [132 bytes]

It is important to note, that this process is not necessary, and you will save time by simply allowing davinci to perform evalN1_krc() on its own. Especially if you do not know all of the input parameters for the function.

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Return to evalN1 krc().
Retrieved from "https://krc.mars.asu.edu/index.php?title=evalN1_krc()"
View source for evalN1 krc()

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