Table 2.2 The distribution of guiding modes (hours)
===================================================
   SI      IN      EC      GY      CT      FL Total
  WFP  20.719   3.608   6.164   3.084 130.349 163.924
  FOC   0.833   0.000   0.000   0.000  24.186  25.020
  FOS   3.542   0.000   0.000   0.000  43.859  47.401
  HRS   9.007   0.000   0.014   5.183   8.271  22.476
  FGS   0.000   0.000   0.000   0.011   0.084   0.095
Total  34.102   3.608   6.178   8.279 206.750 258.916
    %  13.171   1.393   2.386   3.197  79.852 100.000
-----------------------
SI = Science Instrument
IN = Internal
EC = Earth Calibration
GY = Gyro
CT = Coarse Track
FL = Fine Lock
%  = Percentage