A study conducted previously at the Space Physics Research Laboratory, University of Michigan (Hays et al., 1988) has concluded that measurement of the spectral intensity of the O sub 2 atmospheric band is the most feasible technique. The basic determination of the te
Orbital reentry of large maneuverable vehicles and the potential to modify orbital parameters using the aerobreaking technique have increased the need to understand in detail the variability of atmospheric density in the mesosphere and lower thermosphere. The variability of mass density in the mesosphere has been apparent for many years, being seen in sounding rocket data, backscatter radar profiles, and airglow optical emissions. The systematic variations that have been determined ...