% Codes Adapted and Reuse from Eric Peasley
function mass = GetMass (t)
initialMass = 2.9e6;                % kg
initialFuelMass = 2.15e6;       % kg
burnTime = 150;  % seconds
burnRate = 0.01;   %kg/s
if ( t <=0 )
mass = 2.9e6;
elseif (t >0 && t< burnTime )
mass = 2.9e6 - 2.15e6;
else
mass =   0;

end

