Japan Geoscience Union Meeting 2015

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International Session (Poster)

Symbol M (Multidisciplinary and Interdisciplinary) » M-TT Technology & Techniques

[M-TT05] New phase of GPS/GNSS application as an integrated earth observation system

Wed. May 27, 2015 6:15 PM - 7:30 PM Convention Hall (2F)

Convener:*Yoshinori Shoji(The Second Laboratory of Meteorological Satellite and Observation System Research Department, Meteorological Research Institute), Toshitaka Tsuda(Research Institute for Sustainable Humanosphere), Teruyuki Kato(Earthquake Prediction Research Center, Earthquake Research Institute, The University of Tokyo), Hiromu Seko(Meteorological Research Institute), Kazutoshi Sato(Japan Aerospace Exploration Agency)

6:15 PM - 7:30 PM

[MTT05-P02] Water vapor monitoring over the ocean using a shipborne GNSS receiver

*Mikiko FUJITA1, Akira WADA2, Tetsuya IWABUCHI3, Chris Rocken3 (1.JAMSTEC, 2.Hitachi Zosen Corporation, 3.GPS Solutions Inc.)

Keywords:GNSS, precipitable water vapor

Experimental cruises were conducted with a global navigation satellite system (GNSS) antenna installed facing the zenith on the deck of the research vessel to investigate the accuracy of precipitable water vapor (PWV) and benefits of multi-GNSS processing. Also, more than 100 profiles were observed by radiosondes released from the ship during the experiment. Using multi-GNSS signals improved the estimation accuracy of PWV on the vessel. The root means square (rms) and bias of PWV between GPS and radiosonde observations was smaller in the case of multi-GNSS.
Although some microwave satellites observe oceanic water vapor, they are insufficient for in-depth study of air-sea interaction. GNSS-PWV is advantageous because of its high accuracy and temporal resolution, and it would be useful for numerical weather predictions, such as for typhoons or hurricanes.