Fine scale structure and turbulence parameters in the equatorial middle atmosphere |
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| Institution: | 1. Environmental Process Modelling Centre (EPMC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 CleanTech Loop, CleanTech One, #06-08, 637141, Singapore;2. School of Civil and Environmental Engineering, Nanyang Technological University, N1-01c-98, 50 Nanyang Avenue, 639798, Singapore;3. 132 Rowley Laboratories, Civil and Environmental Engineering, Clarkson University, Potsdam, NY 13699-5710, USA |
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| Abstract: | Two rockets carrying identical spherical probe payloads were launched from Thumba to measure positive ion density of the mesosphere and lower thermosphere over an equatorial location. Data obtained show the presence of strong irregularities in the ion density. From the measured positive ion current, the spectra of the spatial density fluctuation, turbulent velocity, energy dissipation rate and eddy diffusion coefficients have been derived in the altitude range of 70–100 km. The results are found to be different from those at middle and high latitudes. |
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