3.06 KM 10 K FEET.O2 THINS PILOTS USE TANKED SUPPLY. OZONE GENERATION REDUCED. OZONE GENERATED AT 0 TO 10 K FEET. RISES TO 20 K TO 30 K LAYER. GREATEST O2 PRODUCTION AT EQUATOR. GREATEST OZONE [ O3] PRODUCTION AT EQUATOR EARTH'S SPIN [ WINDS] CARRY O 3 TO POLAR CAPS.