Table 2.2 The distribution of guiding modes (hours)
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   SI      IN      EC      GY      CT      FL Total
  WFP  16.494   2.587   2.593   0.167 151.226 173.067
  FOC   0.250   0.000   0.000   0.000   4.941   5.191
  FOS   5.383   0.000   1.075   0.000  40.317  46.776
  HRS  12.922   0.000   0.001   0.000  29.084  42.008
  FGS   0.000   0.000   0.000   0.000   0.070   0.070
Total  35.050   2.587   3.670   0.167 225.639 267.112
    %  13.122   0.968   1.374   0.062  84.473 100.000
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SI = Science Instrument
IN = Internal
EC = Earth Calibration
GY = Gyro
CT = Coarse Track
FL = Fine Lock
%  = Percentage