Effect of solar cycle 23 in foF2 trend estimation

Earth, Planets and Space

Table 1 foF2 trend assessed from monthly median foF2 values (July, 12 LT)

foF2 values obtained with SUPIM and IRI model, and with experimental data (Exp). The last two rows correspond to corrected trends assessed as experimental minus modeled values. The years correspond to the end of the period considered since 1964: 1994 (1964 to 1994) period not including cycle 23, 2002 (1964 to 2002) includes the maximum of cycle 23, and 2008 (1964 to 2008) includes maximum and descending phase of cycle 23. ^aNon-significant values.