MMS 3 FGM: Magnetospheric Magnetic Field Measurements at 128 Samples/s

Magnetospheric Multiscale (MMS) mission data from the Flux Gate Magnetometer (FGM) on spacecraft MMS3, providing direct current (DC) magnetic field measurements. The Level 2 (L2) burst mode data offers high-resolution readings at 128 samples per second within the mission's Region of Interest. Data is produced by NASA, with instrument calibration performed at UCLA and the Technical University, Braunschweig.

Use Cases

• Analyzing high-frequency magnetic field fluctuations in Earth's magnetosphere based on 128 samples/s burst mode data.
• Cross-calibrating magnetic field measurements using the dual Analog and Digital Fluxgate Magnetometer system described.
• Studying magnetic field structure and dynamics within the MMS mission's Region of Interest (ROI).
• Validating space weather models with in-situ magnetic field measurements from the MMS spacecraft.

Strengths

• Provides high-resolution burst mode data at 128 samples per second.
• Instruments were cross-calibrated, with absolute error estimated at no more than 0.2 nT in total magnitude within the ROI.
• Data product combines measurements from dual magnetometers (AFG and DFG) operated as a single instrument.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Small offset differences may exist between burst and survey mode data within the stated measurement error.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Measured in-situ by the Flux Gate Magnetometer (FGM) instrument on the MMS 3 spacecraft.

Time Range

Covers the operational period of the MMS mission, with specific time ranges dependent on data files.

Freshness

Last updated 2026-03-13 06:08:29.766412; freshness should be verified.

Geography

Spatial coverage is along the orbit of the MMS 3 spacecraft in Earth's magnetosphere and surrounding regions.