Japan Geoscience Union Meeting 2019

Presentation information

[E] Oral

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

[M-TT46] New phase of GPS/GNSS application as an integrated earth observation system

Mon. May 27, 2019 3:30 PM - 5:00 PM 106 (1F)

convener:Yoshinori Shoji(The Second Laboratory of Meteorological Satellite and Observation System Research Department, Meteorological Research Institute), Kaoru Ichikawa(Research Institute for Applied Mechanics, Kyushu University), Yusaku Ohta(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Takuya Tsugawa(National Institute of Information and Communications Technology), Chairperson:Yoshinori Shoji(Meteorological Research Institute)

4:00 PM - 4:15 PM

[MTT46-14] Water vapor estimation via propagation delay of 920MHz wireless communication signal

*Nobuyasu Shiga1, Satoshi Yasuda1, Seiji Kawamura1, Hiroshi HANADO1, Ryuichi Ichikawa1, Hironori Iwai1, Shinsuke Satoh1 (1.National Institute of Information and communications technology)

Keywords:water vapor estimation, space-time synchronization, propagation delay measurement, wireless communication module

We have developed a 920MHz wireless communication module that can measure the variation of propagation delay precisely (6mm precision) and frequently (20 times/second). We have monitored the variation of propagation delay between 2 places that are 4.25km apart with line-of-sight. The result agreed well with the estimated propagation delay using the data obtained by meteorological observation equipment. This technique is suited to monitor the distribution of surface water vapor, compared to GNSS that primarily measures the propagation delay in vertical direction.
We are seeking the right path for social imprementation of this technology, aiming to provide a mean to measure the surface water vapor with high precision, high frequency and high resolution in a cost-effective way.