About ASM


The Absolute Scalar Magnetometer (ASM) carried aboard the Swarm satellites measures the strength of the magnetic field to greater accuracy than any other magnetometer. It provides scalar measurements of the magnetic field to calibrate the Vector Field Magnetometer (VFM).

The instrument was developed by the French Space Agency (CNES) and the French Atomic Energy Commission.


ASM Data


Download data from the Swarm mission through the Swarm Dissemination Server.

The access and use of Swarm products are regulated by ESA's Data Policy and subject to the acceptance of the specific Terms and Conditions.


VirES for Swarm, the virtual research service, is a highly interactive data manipulation and retrieval interface for Swarm constellation mission products. It includes tools for studying various geomagnetic models by comparing them to the Swarm satellite measurements at given space weather and ionospheric conditions.
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The Swarm Virtual Research Environment (VRE) is a cloud service which provides a web-based interactive development environment based on JupyterLab.

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Swarm-Aurora is a web-based platform that facilitates the identification of opportunities for auroral research utilising Swarm data.

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The Average Magnetic field and Polar current System model (AMPS) is a climatological model of polar ionospheric currents, based on magnetic field measurements from the CHAMP and Swarm satellites.

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ASM Quality Control Reports

Swarm Quality Control Reports are produced on a weekly basis and and cover the quality and the data acquired by the three Swarm satellites and the products produced from this data.