function  [UserVar,AGlen,n]=DefineAGlenDistribution(UserVar,CtrlVar,MUA,F)

User input m-file to define A and n in the Glenn-Steinemann flow law

[UserVar,AGlen,n]=DefineAGlenDistribution(UserVar,CtrlVar,MUA,F)
[UserVar,AGlen,n]=DefineAGlenDistribution(UserVar,CtrlVar,MUA,time,s,b,h,S,B,rho,rhow,GF)

Note: Use

[AGlen,B]=AGlenVersusTemp(T)

to get A in the units kPa^{-3} yr^{-1} for some temperature T (degrees Celsius)

n=3 ;
A=6.338e-25;                                           % A in SI units for temperate ice ;
AGlen=A*1e9*365.2422*24*60*60+zeros(MUA.Nnodes,1);     % A in the units kPa^{-3} yr^{-1}
end