a. For design purposes the “worst-case” activity values given in Table 6‑3 shall be used.
NOTE These can be the high or low values, depending on the effect to be studied.
b. All worst-case values shall be used without any additional margin.
c. The values given in Table A-1 for a full solar cycle shall be used:
1. for applications that require a realistic sequence of index values for future predictions, for example orbital calculations using index-driven atmospheric models;
2. for a given specific phase of the solar activity cycle.
d. The solar cycle activity in Table A-1 of the normative annex shall be extended by repetition of the 11year cycle.
NOTE August 2008 can be assumed as start of cycle 24 unless another estimate with a higher confidence level is released from the Solar Cycle 24 Prediction Panel (at NOAA Space Environment Center (SEC) [RD.4]).