Acoustic Travel Time data for GNSS-A in Hikurangi (2019-2024)

These data files were collected as part of GNSS-A operations on the Hikurangi Subduction Zone, and can provide estimates of crustal deformation rates along the plate boundary. The data were collected on missions starting in 2019 by a remotely-operated Wave Glider system. The Wave Glider collects GNSS data while ranging to an array of seafloor transponders. All of the GNSS-A sites are located on the accretionary prism. The "bcsonardyne" files are in ASCII format and contain raw two-way acoustic travel time between the Wave Glider transducer and the seafloor transponders. The "acoustics" files are ASCII comma-separated CSV files that contain the acoustic ranges and QC metrics for each acoustic reply received by the Wave Glider. There is one acoustics file for each transponder in an array for a given survey. The file names identify the site and date. Some file names also include time and/or Wave Glider ID, and the unique ID of the transponder. The files were generated with NSF funding as part of the project called Along Strike Variation in Shallow, Offshore Strain Accumulation and Slow Slip at Hikurangi Subduction Margin, New Zealand, funded with NSF awards OCE-1754929 and OCE-1754767, and New Zealand Ministry for Business and Innovation Endeavour Research Fund, contract CO5X1605 to GNS Science.