where are the two main hemispheric jet streams located
The polar jets, at above sea level, and the higher altitude
Jet stream
The strongest jet streams are the polar jets, at above sea level, and the higher altitude and somewhat weaker subtropical jets at . 
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Jet stream [SEP] Introduction
The Coriolis force is caused by the planet's rotation on its axis. On other planets, internal heat rather than solar heating drives their jet streams. The Polar jet stream forms near the interface of the Polar and Ferrel circulation cells; the subtropical jet forms near the boundary of the Ferrel and Hadley circulation cells.