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~~NOTOC~~
===== User Function UFS_CouplingGlaDS_SSA =====

==== General Informations ====
  * **USF Fortran File:** ''USF_CouplingGlaDS_SSA.F90''
  * **USF Name:** ''HorizontalVelo'' and ''OverburdenPressure''
  * **Required Input Variable(s):** ''SSAVelocity'', ''Zb'' and ''Zs''
  * **Optional Input Variable(s):** 


==== General Description ====
The aim of this user function is to pass information from the SSA solver to the GlaDS solver. 


==== SIF contents ====
The required keywords in the SIF file for these user functions are:
<code>
Material 1
  ...
  Sliding Velocity = Variable Coordinate 1
     Real Procedure "ElmerIceUSF" "HorizontalVelo"
  
  Ice Normal Stress = Variable Coordinate 1
     Real Procedure "ElmerIceUSF" "OverburdenPressure"
  ...
End
</code>

   
==== Examples ====
An example can be found in ''[ELMER_TRUNK]/elmerice/Tests/GlaDS_SSA''.