RV Investigator IN2026_V01: High-Precision Marine Magnetometer Data from Antarctic Voyage

January 02 to February 25, 2026 magnetometer readings collected during the RV Investigator's 'Cook Ice Ecosystems and Sediments' voyage from Hobart. The data consists of 19 raw files totaling 326 MB, acquired by a SeaSPY2 Overhauser sensor towed astern of the ship. No processing has been conducted on this data, which is stored by CSIRO.

Use Cases

• Map regional geomagnetic anomalies based on high-precision magnetic field measurements.
• Analyze temporal magnetic field variations during the Antarctic summer voyage period.
• Correlate magnetic data with bathymetric or geological surveys for seafloor feature identification.
• Calibrate or validate other marine geophysical instruments using the sensor's specified 0.1 nT accuracy.

Strengths

• Sensor has high precision with 0.001 nT resolution and 0.01 nT sensitivity.
• Data collection covers a specific 55-day Antarctic research voyage with defined departure and return points.
• Instrument design eliminates heading error and requires no realignment, potentially reducing data artifacts.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect geographic/temporal bias inherent to the single voyage from data_gov_au.

Provenance

Source

Australian Ocean Data Network

Collection Method

Collected by a SeaSPY2 Overhauser magnetometer towed 300 m behind RV Investigator, with a 376 m layback applied.

Time Range

2026-01-02 to 2026-02-25

Freshness

Last updated 2026-06-16 23:54:50.966089; freshness should be verified

Geography

Southern Ocean/Antarctic region, voyage departed from and returned to Hobart, Tasmania.