STR (Swarm)


About STR


The Star Tracker on the Swarm satellites is comprised of three Camera Head Units (CHUs) mounted on the innermost end of the optical bench. It retrieves information on the precise satellite orientation and attitude in space. Nominally, the attitudes of all three heads are provided simultaneously at 2 Hz rate, however one head is regularly blinded by the Sun leaving the attitudes of just two heads. The attitudes of the 2-3 CHU are combined into one attitude, the attitude of the STR Common Reference Frame (CRF).

STR 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.
find out more
The Swarm Virtual Research Environment (VRE) is a cloud service which provides a web-based interactive development environment based on JupyterLab.

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

find out more
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.

find out more

STR 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.