Vol.75

Journal of the Aerological Observatory vol.75
Title		Author
Foreword	in Japanese	Shingo YAMADA
Frontispiece	in Japanese	Keisuke UENO
Investigation of a wind state using estimate of roughness and zero plane displacement height at Tateno	in Japanese	Tomohiro KAI
The Effect of Bird on Observation of a Wind Vane Anemometer	in Japanese	Takahiro KASUKAWA and Toshihiro ABO
Quantitative comparison of the iMS-100 and the RS-11G GPS sondes for characterization of routine soundings	[Abstract]	Eriko KOBAYASHI and Shunsuke HOSHINO
Surface Ozone Observation at Aerological Observatory from 1988 to 2016	in Japanese	Toshihiro ABO, Yukio KOMAZAKI, Matsumi TAKANO and Ryoudou SHIGEBAYASHI
Comparison on the pyranometer of calibration methods using the pyrheliometer (Alternating sun-and-shade method and Collimation tube method)	in Japanese	Osamu IJIMA, Tetsuya SHIMAMURA, Noriaki OSHIKI and Yoshiyuki NOTO
Development of the Calibration System and Accuracy of Calibration for the Spectroradiometer	in Japanese	Osamu IJIMA, Matsumi TAKANO, Akihiro YAMAZAKI, Haruma ISHIDA and Rei KUDO

Abstract Lists

Title: Quantitative comparison of the iMS-100 and the RS-11G GPS sondes for characterization of routine soundings
Author: Eriko KOBAYASHI and Shunsuke HOSHINO
Abstract: At the Aerological Observatory (Tateno station) of Japan Meteorological Agency in Tsukuba, Ibaraki, Meisei model RS-11G GPS sondes were replaced by Meisei model iMS-100 GPS sondes in September 2017. We carried out observations to compare these two types of radiosondes during four seasons and identified differences in performance. The results of the comparison show that the temperature recorded by the iMS-100 was 0.2 K higher than that recorded by the RS-11G above the 200-hPa layer during daytime observations. The pressure recorded by the iMS-100 was larger than that recorded by the RS-11G and the difference was smaller than 0.5 hPa between the 1000-hPa and the 200-hPa layers. The relative humidity recorded by the iMS-100 was higher than that recorded by the RS-11G above the 300-hPa layer during both daytime and nighttime observations. These differences between the two radiosondes would have a negligible impact on daily weather forecasts, but they should be taken into consideration when observation data are used for climate monitoring.