Contains the GNSS-A data obtained by the Japan Coast Guard at the sites along the Japan Trench from March 2011 to June 2020. Initial datasets are stored in the following directories: -[initcfg]: contains initial site-parameter files -[obsdata]: contains initial acoustic observation files Datasets after array determination are stored in the following directories: -[single-default]: contains the results of preprocessing (non-rigid-array analysis) -[cfgfix-default]: contains initial site-parameter files for rigid-array analysis These data can be processed with GARPOS. Sample shell script is also stored. Note that the site names "TU??" correspond to the sites "G??", which had deployed by the group of the Tohoku University (e.g., Kido et al., 2015; Honsho et al., 2019). The data at "TU??" are independently obtained by the Japan Coast Guard.

{"references": ["Kido et al. (2005)\u00a0\"Progress in the project for development of GPS/Acoustic technique over the last 4 years\" in GENAH, M. Hashimoto, Ed. pp. 3\u201310.\u00a0https://doi.org/10.1007/1345_2015_127", "Honsho et al. (2019)\u00a0Offshore postseismic deformation of the 2011 Tohoku earthquake revisited: application of an improved GPS-acoustic positioning method considering horizontal gradient of sound speed structure. J. Geophys. Res. Solid Earth 124, 5990\u20136009.\u00a0https://doi.org/10.1029/2018JB017135"]}

The observations were performed by the survey vessels operated by the Japan Coast Guard.