MBARI Mapping AUV near-bottom processed magnetometer data (ASCII format) at the Mid-Atlantic Ridge Puy des Folles Seamount, EMARK Massif, Falkor EMARK Vents, and Hydra (Grappe Deux) (2023)

This processed magnetometer data set was collected with a WHOI-style Applied Physics Systems model 1540 3-axis fluxgate sensor mounted in the mid-body of the vehicle on MBARI Mapping AUV mission surveys at four Mid-Atlantic Ridge sites: the summit of Puy des Folles Seamount from missions 20230310m1, 20230310m2, and 20230402m1; the EMARK Massif from missions 20230314m1, 20230314m2, 20230315m1, 20230316m1, 20230317m1, 20230317m2, 20230318m1, 20230319m1, 20230319m2; the Falkor EMARK Vents from missions 20230321m1, 20230321m2, and 20230323m1; and Hydra (Grappe Deux) from missions 20230325m1, 20230326m1, 20230328m1, and 20230329m1 (investigators David Caress, Jeffrey Beeson, Jennifer Paduan, Sharon Walker, David Butterfield). The files contain data collected during the near-bottom survey only and not during the descent or ascent. They include processed vehicle navigation and attitude, and raw, uncorrected magnetics values. The data files are in ASCII format and contain the following columns: year, month, day, hour, min, sec, latitude (dec. degrees), longitude (dec. degrees), depth (meters), pressure (decibars), heading (degrees), altitude (meters), magx (Gauss), magy (Gauss), magz (Gauss), mag_temp (degrees C). For the ascent, descent, and calibration maneuver, see the main vehicle computer (MVC) logs. The AUV survey missions were conducted during the 2023 R/V Falkor (too) cruise FKt230303 (chief scientist David Butterfield) to the Mid-Atlantic Ridge. Funding was provided by the Schmidt Ocean Institute and a grant from the David and Lucile Packard Foundation to MBARI.