Abstract
Low latitude middle atmospheric electrodynamics has a number of interesting features such as low flux of cosmic rays due to high cut-off rigidities, higher solar electromagnetic radiation intensities and mesospheric ionisation, large scale convection and wide-spread lightning phenomena, higher tropopause level and special characteristics associated with the equatorial electrojet. These special features play a vital role in governing the electrodynamics of the global middle atmosphere. In India, a well coordinated multi-institutional campaign was organised under MAP (Middle Atmosphere Programme) to carry out balloon and rocket borne experiments to measure electrical parameters of the middle atmosphere. The measured parameters include electron/ion densities and mobilities, polar ion conductivities and electric fields. The experiments were carried out during different seasons and solar activity epochs. The results obtained from these investigations are discussed and compared with similar measurements over the middle latitude stations to assess the integrated effect of the global atmospheric electrodynamic phenomenon.
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