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The coefficients for the saturation temperature relation for the condensing gas are now input parameters. 
KRC uses the Clausius-Clapeyron relation:


::ln P = a - b/T


where P is pressure in Pascal and T is temperature in Kelvin. 

This should be useful for Mars, Titan, Pluto etc.

:SatPrA correspond to the Clausius-Clapeyron coefficient 'a'.

:SatPrB corresponds to the Clausius-Clapeyron coeffcient 'b'.

:LVFT = "T"

Values for CO2 are a = 27.9546 and b = 3182.48 (Provided by HHK, most likely from the Mars book).
Values for N2 are a = 9.2338 and b = -724.9720 (Derived by SP using this table: [[File:Clausius_Clapeyron.xlsx]]

The proper molecular weight should be input AMW. The Mass-fraction of mean atmosphere that is non-condensing should also be specified with FANON.

===Mars===

 SatPrB = 3182.48
 SatPrA = 27.9546
 AMW    = 43.54             #SP's own calculation
 FANON  = 0.040             #Paul R. Mahaffy, Science 2013 (SAM)
 KPREF  = 1

[[Image:TFROST_1.png|800px]]

 out_1 = krc(lat=72.,SatPrA=27.9546,SatPrB=3182.48,AMW=43.54,FANON=0.040,KPREF=1,LVFT="T" )
 out_2 = krc(lat=72.,TFROST=151.)

===Pluto===

  SatPrB = 9.2338
  SatPrA = -724.9720
  AMW    = 27.
  FANON  = 0.1
  KPREF  = 0


===Titan===
 SatPrB = 9.2338
 SatPrA = -724.9720
 AMW    = 28.8
 FANON  = 0.016
 KPREF  = 0


KRC function: KRC_Cond_Gas()



JBARE forces frost free at specified season. Default JBARE=0. (no forcing when = 0.)

JBARE corresponds to a CROCUS date, in Ls. 

Note: the interface facilitates the use of JBARE so that JBARE ~ CROCUS date (Ls), but KRC has a more complex definition.

[[Image:TFROST_2.png|800px]]

 out_1 = krc(lat = 75.)
 out_2 = krc(lat = 75, JBARE = 50.)

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