[M-TT37] New Developments in Earth Science Explored by Dense GNSS Observation Networks

[MTT37-01] Operation and current achievement of a “Consortium to utilize the SoftBank original reference sites for Earth and Space Science”

*Yusaku Ohta¹ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University)

Keywords:SoftBank, GNSS, Dense GNSS network

Monitoring the earth's surface provides essential information for a wide area of earth science. Various GNSS networks have been constructed at the national and regional levels for such earth science fields and other purposes. In Japan, cell phone carriers have constructed independent GNSS networks to improve their positioning services in recent years. Ohta and Ohzono (EPS, 2022) investigated the performance of a GNSS network operated by SoftBank Corp. for crustal deformation monitoring. The network has more than 3,300 sites throughout Japan, approximately 2.5 times the number of the GEONET sites. Based on this background, the Graduate School of Science, Tohoku University, in cooperation with SoftBank Corp. and ALES Corporation, established an academic-industrial consortium (Consortium to utilize the SoftBank original reference sites for Earth and Space Science, CSESS for short) to utilize SoftBank's GNSS observation data. CSESS has acquired raw data from all SoftBank stations every 30 seconds and is promoting using these data and routinely analyzing them to develop a system to utilize the daily coordinate values within the consortium. The presentation will summarize the results and present the prospects for their utilization.

Acknowledgments: The SoftBank's GNSS observation data used in this study was provided by SoftBank Corp. and ALES Corp. through the framework of the "Consortium to utilize the SoftBank original reference sites for Earth and Space Science".