Table 2.2 The distribution of guiding modes (hours)
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   SI      IN      EC      GY      CT      FL Total
  WFP  15.183   4.653   7.928   3.694 125.861 157.320
  FOC   2.500   0.000   0.000   0.000  17.115  19.615
  FOS   2.628   0.000   0.000   2.497  45.405  50.530
  HRS   3.425   0.000   0.000   0.000  10.609  14.034
  FGS   0.000   0.000   0.000   0.000   0.092   0.092
Total  23.736   4.653   7.928   6.192 199.081 241.591
    %   9.825   1.926   3.282   2.563  82.404 100.000
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SI = Science Instrument
IN = Internal
EC = Earth Calibration
GY = Gyro
CT = Coarse Track
FL = Fine Lock
%  = Percentage