Raw multichannel seismic reflection data (SEG-D format) and supporting metadata, R/V Tangaroa research voyage TAN2006 (2020)

Seismic data acquisition

Multichannel 2D seismic data acquisition was conducted using a single GI-Source towed at ~3 m water depth. The GI-Source was operated in True GI mode (Generator/Injector: 0.7/1.7 l), and the recorded signal was sampled every 1 ms, resulting in a dominant seismic frequency of ~100 Hz. Seismic data were recorded for 3.5 s using a Geometrics GeoEel digital streamer equipped with six ION Digicourse birds providing depth control (target depth: 5 m) and, for three of them, compass measurements.

Files

• Raw shot files (SEG-D format) by acquisition line (e.g., <LINE>_segd.tar.gz)

  • Navigation records are stored in SEG-D user header (see TAN2006_navigation_shots_*.nav for extracted information)
  • Filenames with the suffix <LINE>_r indicate lines that were reshot due to e.g., large line deviation or weather conditions

• TAN2006_bird_records.tar.gz: Unprocessed streamer bird records (by acquisition line, e.g., <LINE>.bird)

• TAN2006_bird_records_processed.txt: Processed (concatenated, cleaned) streamer bird records.

• TAN2006_navigation_shots.nav: Raw navigation records (per shot, from SEG-D headers).

• TAN2006_navigation_shots_valid.nav: Raw navigation records (per shot, from SEG-D headers) of valid shots only

Reference

Pecher, I., Hillman, J., Davy, B., Gorman, A. R., Woelz, S., Andrew, D., et al. (2022). “Geologic Champagne” voyage report R/V Tangaroa TAN2006: 26 June – 17 July 2020, Wellington–Wellington. (Cruise Report No. 2022/09) (p. 72). GNS Science. https://doi.org/10.21420/GT27-A456