Munehiko Yamaguchi

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The Japan Meteorological Agency (JMA) began operation of a new Ensemble Prediction System (EPS) known as the Typhoon EPS (TEPS) in February 2008. TEPS has been designed to improve track forecast targeting for tropical cyclones (TCs) in the Regional Specialized Meteorological Center (RSMC) Tokyo Typhoon Center’s area of responsibility within the framework of(More)
This study compares six different guidance products for targeted observations over the northwest Pacific Ocean for 84 cases of 2-day forecasts in 2006 and highlights the unique dynamical features affecting the tropical cyclone (TC) tracks in this basin. The six products include three types of guidance based on totalenergy singular vectors (TESVs) from(More)
The preparation of piezoelectric AIN thin films of high quality onto diamond substrates using DC-TFTS method and its application to SHF SAW devices are discussed. FWHM (=3.4deg) of the rocking curve of XRD suggested that the c-axes of AIN films may well align perpendicular to the film surface. Transversal filters based on Sezawa wave were fabricated to(More)
Ensemble initial perturbations around Typhoon Sinlaku (2008) produced by ECMWF, NCEP, and the Japan Meteorological Agency (JMA) ensembles are compared using The Observing System Research and Predictability Experiment (THORPEX) Interactive Grand Global Ensemble (TIGGE) data, and the dynamical mechanisms of perturbation growth associated with the tropical(More)
Amplitude/phase temperature compensation attenuators have been developed. The circuits are based on new variable-<i>Q</i> field-effect transistor resonators. By employing the configuration, the dynamic range of the attenuation and the phase-shift can be flexibly determined. To verify this methodology, we have fabricated a low phase-shift temperature(More)
The objective of this report is to document recent progress since IWTC-5 on the topic related to the Targeted observation and data assimilation in track prediction. The report begins by reviewing the background of targeted observations, followed by an introduction to the techniques specifically used for targeted observations and data assimilation to improve(More)
We fabricate the bismut titanate (Bi<sub>4</sub>Ti<sub>3</sub>O<sub>12</sub>) thin films used an alcohol related solutions which dissolved Bi(OtC<sub>5</sub>H<sub>11</sub>)<sub>3</sub> and Ti[OCH(CH<sub>3</sub>)<sub>2</sub>]<sub>4</sub> in C<sub>2</sub>H<sub>5</sub>OC<sub>2</sub>H<sub>4</sub>OH for micro liquid delivery systems such as ink-jet printing(More)
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