Table 2.2 The distribution of guiding modes (hours)
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   SI      IN      EC      GY      CT      FL Total
  WFP  20.366   0.000   1.506   3.611 133.338 158.821
  FOC   4.417   0.000   0.000   0.661  17.570  22.648
  FOS   0.156   0.000   0.000   0.000  43.725  43.880
  HRS  18.884   0.000   0.000   1.432  32.469  52.785
  FGS   0.000   0.000   0.001   0.000   0.091   0.091
Total  43.823   0.000   1.506   5.704 227.193 278.226
    %  15.751   0.000   0.541   2.050  81.658 100.000
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SI = Science Instrument
IN = Internal
EC = Earth Calibration
GY = Gyro
CT = Coarse Track
FL = Fine Lock
%  = Percentage