What is Honeywell / Quantum Brilliance / Jagiellonian ESA Compact Quantum Space Magnetometer?

This is a compact quantum magnetometer developed through a collaboration involving Honeywell, Quantum Brilliance, and Jagiellonian University for the European Space Agency, using nitrogen-vacancy centers in diamond as quantum sensors to measure magnetic fields with high precision in a small, spaceflight-compatible package. NV-diamond magnetometry exploits the spin states of defects in a diamond lattice, which shift measurably in response to external magnetic fields, to sense field strength and orientation without the bulk of traditional superconducting or vapor-cell sensors.