One line per record.
Field  1:  transmitter/receiver ID
Field  2:  year
Field  3:  month
Field  4:  day
Field  5:  hour
Field  6:  minute
Field  7:  second
Field  8:  J2000
Field  9:  clock bias (sec)           bias
Field 10:  clock rate (dimensionless) rate
Field 11:  clock acceleration (/sec)  accel
Field 12:  optional formal error in clock bias (sec)

The time fields are in UTC time (_not_ GPS).

Examples
AREQ     1994 07 14 20 59 50.00 -.1725084100000000E+09  .211009463089E-06  .0000
00000000E+00  .000000000000E+00  .542958713205E-08
GPS16    1994 07 14 20 59 50.00 -.1725084100000000E+09 -.729556269729E-04  .000000000000E+00  .000000000000E+00  .407960512717E-08