KRC for Europa

Notes

Some parameters are set to realistic values by default, including:

Mat1 = "H2O" which assignes water ice Cp, Density, and Conductivity properties

Mat2 = "H2O" which assignes water ice Cp, Density, and Conductivity properties

ALBEDO = 0.67

PTOTAL = 0 which eliminates the atmosphere (ELEV, TAU, etc. unused)

When running the DaVinci interface, default Mars atmospheric values might be printed on the screen but not effectively used (PTOTAL = 0.)

Command Line Examples

Basic surface temperatures for Europa:

dv>  OUT = krc(lat = 0, INERTIA = 45., body="Jupiter,Europa", bodytype = "minor", ALBEDO = .55, LKofT = "F")

To include the visible and thermal infrared flux from Jupiter, two approaches are possible:

1: Use default built-in parameters, set PFlux = "T", and Lon_Hr

Lon_Hr [0-24] is the surface longitude relative to the sub-Jupiter point, expressed in hours.

When Lon_Hr < 6, the surface point is on the Antijovian hemisphere => No flux contributed.

When 6 < Lon_Hr < 18, the surface point is on the subjoin hemisphere => Flux is contributed (max at Lon_Hr = 12.).

When Lon_Hr > 18, the surface point is on the Antijovian hemisphere => No flux contributed.

dv> OUT  = krc(lat = 0., INERTIA = 70., body = "Jupiter,Europa", bodytype = "minor", ALBEDO = 0.55, PFlux = "T", Lon_Hr = 12., LKofT = "F")

2: Provide values for all the necessary input parameters, and set PFlux = "T" (Default provided for common bodies)

BT_Avg  : Average Brightness Temperature [K]

BT_Min  : Min Brightness Temperature, if diurnal cycle [K]

BT_Max  : Max Brightness Temperature [K]

Dis_AU  : Distance from Sun in AU

Geom_alb  : Geometric Albedo [1]

Mut_Period : Mutual Period [?]

Orb_Radius : Orbiting Radius [km]

Radius  : Radius of the Obiting body [km]

Lon_Hr  : Longitude Hour of the surface point (see above)

dv> OUT  = krc(lat = 0., INERTIA = 70., body = "Jupiter,Europa", bodytype = "minor", ALBEDO = 0.55, PFlux = "T", BT_Avg = X., BT_Min = X., BT_Max = X., Dis_AU = X., Geom_alb = X., Mut_Period = X., Orb_Radius = X., Radius = X., Lon_Hr = 12., LKofT = "F")

3: Provide Visible and IR flux tables vs. LTST, and set PFlux = "T"

IR: A 2 x n x 1 array with IR flux (1st col.) vs. LTST (2nd col.)

Vis: A 2 x n x 1 array with Vis flux (1st col.) vs. LTST (2nd col.)

dv> OUT  = krc(lat = 0., INERTIA = 70., body = "Jupiter,Europa", bodytype = "minor", ALBEDO = 0.55, PFlux = "T", Lon_Hr = 12., LKofT = "F")

Europa Eclipsing KRC Fortran Input File Example

Taken from EurH.inp

To learn about eclipsing: Eclipsing User Guide (PDF)