Comparative studies of scatterers observed by MF radars in tbe southern hemisphere mesosphere |
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| Institution: | 1. Department of Physics and Mathematical Physics, University of Adelaide, GPO Box 498, Adelaide 5001, Australia;2. Department of Physics, University of Western Ontario, London, Ontario N6A 3K7, Canada;1. Department of Materials Science and Engineering, Tokyo Institute of Technology, Yokohama, 226-8502, Japan;2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, 980-8577, Japan;1. University of Western Ontario, London, Canada;2. University of Costa Rica, San Jose, Costa Rica |
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| Abstract: | Using data from three radar sites (low, mid and high latitude) we study the aspect sensitivity of mesospheric scatterers probed by MF radars operating at or near a frequency of 2 MHz. The aspect sensitivity (θs) is calculated by the spatial correlation technique. Calculations of θs arc further extended to estimate the lcngth-to-depth ratio of the scatterers which indicate that the scattcrers arc quasi-specular. We find that high and mid latitude sites exhibit clear seasonal behaviour, with maxima occurring in the local summer while the low latitude site shows no significant seasonal behaviour. |
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