IYEAR       i4       4-digit year
IDAY        i4       Day of year (IDAY=1 is January 1)
IHOUR       i3       UT hour (0 – 23)
MIN         i3       UT minute (0 – 59)
<Bx IMF>    f8.2     nT, in GSW coordinates, average over 30-min trailing interval
<By IMF>    f8.2     nT, in GSW coordinates, average over 30-min trailing interval
<Bz IMF>    f8.2     nT, in GSW coordinates, average over 30-min trailing interval
Vx          f8.1     solar wind Vx in GSE coordinates, km/s
Vy          f8.1     solar wind Vy in GSE coordinates, km/s
Vz          f8.1     solar wind Vz in GSE coordinates, km/s
Np          f7.2     solar wind proton density, cm^-3
T           f9.0     solar wind proton temperature, degs K
Sym-H       f7.1     Sym-H index, nT
IMF flag    i5       equals 1 for actually measured or 2 for linearly interpolated IMF
SW flag     i5       equals 1 for actually measured or 2 for linearly interpolated solar wind parameters
Tilt        f8.4     geodipole tilt angle (radians!) in GSW coordinate system
Pdyn        f7.2     solar wind flow ram pressure, nPa
<N-index>   f8.4     average over 30-min trailing interval, see Eq.(1) in TA16_Model_description.pdf 
<B-index>   f8.4     average over 30-min trailing interval, see Eq.(2) in TA16_Model_description.pdf
<SymHc>     f7.1     sliding average over 30-min interval, centered on the current time moment