The calibration facility comprises a 3-axis Helmholtz coil which compensates for the Earth’s magnetic field and can then apply a field up to ±25μT in all 3 axes at frequencies up to 100Hz. It has a thermal enclosure enabling it to measure magnetometer offset, noise and scale factor over a range -50°C to +125°C. Measurement accuracies achieved by the facility are: linearity ±60μT; scale factor better than 0.01%; and alignment better than 0.1°. The Lab also has a magnetically-shielded thermal test system developed for Solar Orbiter and soon to be used for testing the JUICE magnetometer.
