#--it--------t-----------dt-------
     0   0.0000000  1.0000000E+00
     1   1.0000000  1.0000000E+00
     2   2.0000000  1.0000000E+00
     3   3.0000000  1.0000000E+00
     4   4.0000000  1.0000000E+00