;+ ; NAME: ; vt3d_dfluxdtemp_substrate ; PURPOSE: (one line) ; Return (d flux / d T) associated with thermal inertia ; DESCRIPTION: ; Return (d flux / d T) associated with thermal inertia ; CATEGORY: ; Volatile Transport ; CALLING SEQUENCE: ; phi_s = vt3d_dfluxdtemp_substrate(freq, therminertia) ; INPUTS: ; freq : frequency in s^-1 ; therminertia : thermal inertia in erg cm^-2 s^-0.5 K^-1 ; OUTPUTS: ; phi_gamma : d flux/d T in erg cm^-2 s^-1 K^-1 ; where flux is the thermal conduction ; RESTRICTIONS: ; PROCEDURE: ; Young, L. A. 2016, Volatile transport on inhomogeneous surfaces: II. Numerical calculations (VT3D) ; Resubmitted to Icarus. ; Eq. 3.2-9a ; MODIFICATION HISTORY: ; Written 2011 Apr 10, by Leslie Young, SwRI ; 2016 Mar 24 LAY. Modified for inclusion in vt3d library. ;- function vt3d_dfluxdtemp_substrate, freq, therminertia return, sqrt(freq) * therminertia end