Advanced Usage of GPS Slant Delay for Detecting Water Vapor Variation Over the Osaka Bay

S. Oishi, K. Tsuchiya, A. Wada, T. Iwabuchi, E. Nakakita

Abstract:	Water vapor is one of the most important meteorological variables for weather forecasting. Continuous GNSS estimation of wet tropospheric delay is one of the key techniques for detecting rapid changes of water vapor. Water vapor comes from the ocean in Japan. Therefore, observing the water vapor by GNSS on the sea, especially coastal area is required. Moreover, After Great Eastern Japan Earthquake and Tsunami (GEJET) that happened on March 11, 2011, Japanese government has a plan to deploy many GNSS wave buoys. For effective usage of them as multi-purpose monitoring system of environment of the ocean, the study for observing water vapor over the Osaka bay was conducted and it have gotten a good result by comparison with ground fixed observation. However, it is also true that GNSS observation on the ocean still cost a lot. In order to give higher spatial resolution of water vapor, an advanced method for virtually increasing the measurement point of zenith atmospheric delay is proposed by using slant delays from surrounding points that actually observe.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	3392 - 3397
Cite this article:	Oishi, S., Tsuchiya, K., Wada, A., Iwabuchi, T., Nakakita, E., "Advanced Usage of GPS Slant Delay for Detecting Water Vapor Variation Over the Osaka Bay," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 3392-3397.
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