INSID  INSSrc  INSText       INSUnits      INSa0     INSa1      ! (Hz)
  Ittn    07     -       time_to_nav   min           -         1          ! 2
  Iirsd   B8     -       IRS_discretes DIS           -         1          ! 2
  Ilat    C8     -       latitude      deg           -         90         ! 5
  Ilon    C9     -       longitude     deg           -         90         ! 5
  Igs     CA     -       ground_speed  m/s           -         1053.582   ! 10
  Itkangt CB     -       track_angle   deg           360       90         ! 25
  Ithdg   CC     -       thdg          deg           360       90         ! 25
  Ipch    D4     -       pitch         deg           -         90         ! 50
  Irll    D5     -       roll          deg           -         90         ! 50
  Iprt    D6     -       pitch_rate    deg/s         -         64         ! 50
  Irrt    D7     -       roll_rate     deg/s         -         64         ! 50
  Iyrt    D8     -       yaw_rate      deg/s         -         64         ! 50
  Iacx    D9     -       long_acc      g             -         2          ! 50
  Iacy    DA     -       lat_acc       g             -         2          ! 50
  Iacz    DB     -       norm_acc      g             -         2          ! 50
  Iirsm   E8     -       IRS_maint     DIS           -         1          ! 2
  Icc     EC     -       cycle_count   count         -         1048756    ! 50
  Ialt    F1     -       intertial_alt m             -         83.15      ! 25 (needs pressure input)
  Ivertac F4     -       vertical_acc  g             -         2          ! 50
  Iw      F5     -       vertical_spd  m/s           -         83.15      ! 25 (needs pressure input)
  Iv      F6     -       S/N-gs        m/s           -         1053.582   ! 10
  Iu      F7     -       W/E-gs        m/s           -         1053.582   ! 10