The format of the gpsrapid.out and gpsrapid.daily files is:

Col.#    Format  Quantity
-------  ------  -------------------------------------------------------------
1        X       [blank or "p" if values are predictions]
2-6      I5      Modified Julian Date (MJD)
7        X       [blank]
8-14     F7.5    Bull. A PM-x (sec. of arc)
15-21    F7.5    error in PM-x (sec. of arc)
22       X       [blank]
23-29    F7.5    Bull. A PM-y (sec. of arc)
30-36    F7.5    error in PM-y (sec. of arc)
37       X       [blank]
38-45    F8.6    Bull. A UT1-UTC (sec. of time)
46-53    F8.6    error in UT1-UTC (sec. of time)
54       X       [blank]
55-61    F7.5    Bull. A dPSI (sec. of arc)
62       X       [blank]
63-69    F7.5    error in dPSI (sec. of arc)
70       X       [blank]
71-77    F7.5    Bull. A dEPSILON (sec. of arc)
78       X       [blank]
79-85    F7.5    error in dEPSILON (sec. of arc)