Low, moderate, and high long term solar and geomagenetic activities have the following meanings:
low (F10.7 = F10.7_avg = 65, A_p = 0)
moderate (F10.7 = F10.7_avg = 140, A_p = 15)
high long term (F10.7 = F10.7_avg = 250, A_p = 45)

Figure G-3: Variation of the NRLMSISE00 mean atomic oxygen with altitude for low, moderate and high long solar and geomagnetic activities