LEMI-020 digital vector flux-gate magnetometer (FGM) for onboard measurement of Earth's magnetic field and its variations is based on a customized flux-gate sensor with volume magnetic field compensation. Using of volume compensation in the 20 mm3 sensor cube provides high geometrical stability of the axes and highly improved performances.
The magnetometer is produced for embedding into the microsatellite structure and consists of two units - sensor and electronics unit. The majority of electronics is combined in a Field Programmable Gate Array (FPGA). It provides full processing (determined by digital correlation algorithm) of amplified and digitized fluxgate sensor output signal and feedback signal and forms FGM output data. Such digital design together with internal nonvolatile 512 МB flash memory makes the instrument very flexible, reduces power consumption and provides convenient possibilities for customization of the operation modes.