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
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 ÌB flash memory makes the instrument very
flexible, reduces power consumption and provides convenient
possibilities for customization of the operation modes.