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Table 4.

Correction factors for different “optical phases”.

Phase Start Correction factor
1 2004-01-21 1.145
1b 2004-05-26 0.994
1c 2007-07-03 0.948
1c1 2010-04-27 0.960
1c2 2010-10-17 1.047
1c3 2011-04-14 1.082
1d 2011-11-12 1.004

Notes. Correction factor applied for each optical phase. The start date of each phase is given, with each phase lasting up to the start of the subsequent one. See main text for details.

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