IMI30 sidescan and phase bathymetry data (version 3, with IGRF and compass corrections), Guayamas Basin, Gulf of California, Atlantis cruise AT15-54 (2009)

Towed IMI-30 sidescan and phase bathymetry data (version 3, with ping header corrections) for the Guayamas Basin, Gulf of California, collected in 2009 during Atlantis cruise AT15-54 (investigator Dan Lizarralde). Ping headers contain an IGRF magnetic reference field correction and a towfish compass correction. File name extension = -dascc. These data files contain the same corrected towfish navigation as the precursor "dasc" files and were generated by the Hawaii Mapping Research Group (HMRG) and are in the HMRG Bathymetry/Sidescan (BS) format. The data files were acquired as part of the project called Off-Axis Sills of Guaymas Basin: Implications for Thermogenic-Carbon Flux of a Sedimented Rift Basin, with funding provided by NSF grant OCE07-51901.