Browsing by Author "Tsuda, T."
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Item Restricted Frequency domain interferometry observations of tropo/stratospheric scattering layers using the MU radar: Description and first results(American Geophysical Union, 1990-11) Palmer, R.D.; Woodman Pollitt, Ronald Francisco; Fukao, S.; Larsen, M.F.; Yamamoto, M.; Tsuda, T.; Kato, S.This paper describes the first results of the implementation of frequency domain interferometry (FDI) using the Middle and Upper (MU) atmosphere radar. A new method of using this FDI data is introduced, which is shown to be useful in studying the dynamics of scattering layers in the troposphere and lower stratosphere. Using this method, the effective altitude resolution of the MU radar has been improved.Item Open Access High-altitude-resolution observation of the upper stratosphere and lower mesosphere using Jicamarca VHF radar(Coleg Prifysgol Cymru Aberystwyth, The University College of Wales, The Departament of Physics, 1991-08) Fukao, S.; Maekawa, Y.; Yamamoto, M.; Tsuda, T.; Yamanaka, M.D.; Nakamura, T.; Kato, S.; Woodman Pollitt, Ronald FranciscoThe high-power VHF radar technique is a powerful tool to lnvestigate winds and turbulence in the middle atmosphere. However, an entire wind or power profile from the upper troposphere to the lower thermosphere. (10-100 km) has not yet been obtained.- Especially, it is very difficult to observe the so-called ''gap region" from 35 to 60 km due to weak echo power. Recently, the Jicamarca VHF radar facility (50 MHz) in Peru has been greatly improved, and a height resolution of 250-500 m is now achieved by pulse compression using 16- or 32-bit complementary codes. This paper presents a preliminary result of Jicamarca radar observations of the upper stratosphere and lower mesosphere, including the "gap region'', conducted on Sept. 24-28, 1990.