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Correction of Radiosonde Pressure and Temperature Measurements Using Simultaneous GPS Height Data

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/42627

Title: Correction of Radiosonde Pressure and Temperature Measurements Using Simultaneous GPS Height Data
Authors: Inai, Yoichi Browse this author
Hasebe, Fumio Browse this author →KAKEN DB
Shimizu, Kensaku Browse this author
Fujiwara, Masatomo Browse this author
Issue Date: 2009
Publisher: Meteorological Society of Japan
Journal Title: SOLA
Volume: 5
Start Page: 109
End Page: 112
Publisher DOI: 10.2151/sola.2009-028
Abstract: A method of correction for radiosonde pressure and temperature data by using simultaneous global positioning system (GPS) ellipsoidal height (zGPS) is proposed. The correction is made by adjusting the observed pressure and temperature so that the ellipsoidal height (zPTU) calculated from integrating the hypsometric equation by using the latitude- and altitude-dependent gravity together with the observed pressure, temperature and humidity (PTU) agrees with zGPS. The temperature bias is assumed to arise only from inaccurate radiation correction so that there is no temperature bias in the nighttime data. Under this assumption, the deviations of zPTU from zGPS in the nighttime data result only from observational errors in pressure. The pressure adjustment required to remove these deviations is applied also to the daytime data. The daytime temperature bias can then be estimated from the difference between zPTU and zGPS during the day. The biases in Vaisala RS80 pressure and temperature measurements are estimated using the Soundings of Ozone and Water in the Equatorial Region campaign data. The estimated pressure bias is positive below ∼7 km and negative above it. The bias above 15 km is statistically significant. The daytime temperature bias lacks statistical significance due to fluctuations in the results.
Type: article
URI: http://hdl.handle.net/2115/42627
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 長谷部 文雄

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