Range ambiguity effects in Barker-coded multipulse experiments with incoherent scatter radars |
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| Institution: | 1. Graduate School of Life Science and Department of Biological Sciences, Hokkaido University, Sapporo, Japan;2. Department of Obstetrics and Gynecology, and Marine Biomedicine and Environmental Science Center, Medical University of South Carolina, and Hollings Marine Laboratory, Charleston, SC, USA;3. Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Koyama, Tottori, Japan;4. Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, and Department of Basic Biology, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi, Japan;1. Department of Obstetrics and Gynecology, Marine Biomedicine and Environmental Sciences Program, Medical University of South Carolina, Hollings Marine Laboratory, Charleston, SC 29412, USA;2. Center for Reproductive Biology, School of Biological Sciences, Washington State University, Pullman, WA 99164-4236, USA |
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| Abstract: | A Barker-coded multipulse is the best of the classical modulations when high spatial resolution is needed in incoherent scatter measurements. Unfortunately, this type of modulation generates range ambiguities which reduce the quality of data. In this paper, range ambiguity functions for an EISCAT experiment, ESLA-T4, are displayed. A method of eliminating the ambiguities in data analysis is developed and its applicability is demonstrated. It is found that the method can remove the effects of the range ambiguities in the lower part of the E-region, but above 120 km altitude the correction is not sufficient. The residual of the fit is reduced by an order of magnitude. The changes in the temperatures are a few Kelvin at the lowest altitudes and a few tens of Kelvin between 110 and 120 km. |
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