Revisiting the “thermospheric spoon” mechanism of the thermosphere and ionosphere semiannual oscillation

McArthur Jones Jr, US Naval Research Laboratory, Space Science Divsion, Washington, DC, United States, John T Emmert, U.S. Naval Research Laboratory, Space Science Division, Washington, DC, United States, J Michael Picone, George Mason University Fairfax, Fairfax, United States, Douglas Patrick Drob, Naval Research Lab, Space Science Division, Washington, United States and David E Siskind, Naval Research Lab, Washington, DC, United States