RV Investigator IN2026_V01 Magnetometer Data from Antarctic Voyage

Magnetometer data collected from the RV Investigator voyage IN2026_V01, titled 'Cook Ice Ecosystems and Sediments (COOKIES).' The voyage took place between January 02, 2026 and February 25, 2026, departing from and returning to Hobart. A SeaSPY2 magnetometer with high sensitivity and resolution was towed 300 meters astern of the ship.

Use Cases

• Calibrate magnetic anomaly models based on high-precision magnetic field measurements.
• Study temporal variations in geomagnetic field intensity during a Southern Ocean voyage.
• Correlate magnetic data with other oceanographic or geological data collected on the COOKIES expedition.
• Validate sensor performance of the SeaSPY2 Overhauser magnetometer in a marine towing configuration.

Strengths

• Data was collected with a SeaSPY2 magnetometer specified to have an absolute accuracy of 0.1 nT, sensor sensitivity of 0.01 nT, and resolution of 0.001 nT.
• The dataset comprises 19 raw data files totaling 326 MB, suggesting a substantial volume of measurements.
• The instrument's Overhauser sensor is described as having no heading error and requiring no realignment or recalibration.

Limitations

• No processing has been conducted on this data, requiring users to perform their own quality control and analysis.
• Column-level documentation is absent; field semantics must be inferred after download.
• The description states a layback correction of 376 m was applied, but the raw data's positional accuracy relative to the ship may require further validation.

Provenance

Source

CSIRO Marlin Data Catalogue

Collection Method

Collected by a SeaSPY2 magnetometer towed 300 m astern of the RV Investigator.

Time Range

2026-01-02 to 2026-02-25

Freshness

Last updated 2026-06-13 05:48:48.214804; freshness should be verified.

Geography

Southern Ocean/Antarctic region, voyage from Hobart to Hobart.