if;">4 to 7</span><span style="font-family: ms sans serif;">, and the third one has to be the daily geomagnetic amplitude
Ap instead of the 3-hourly Kp. If you modify the sw (switch) array (see
MSIS-86 specific documentation), then you must provide 6
components of sf (2 to 7). The output values of MSIS also differs from all the
other models. MSIS computes the atomic Nitrogen (N) number-density,
while Jacchia models don't. The N number-density contributes to the
density and molecular weight of the para