SBQuantum, a Canadian quantum sensing startup, is scheduled to launch a diamond-based quantum magnetometer into low-Earth orbit on March 30, 2026 — marking one of the first times a nitrogen-vacancy (NV) center magnetometer will operate from space rather than a laboratory bench. The hardware, built around synthetic diamond doped with NV centers, will ride to orbit aboard a Spire Global small satellite launching on a SpaceX Falcon 9 rideshare. It is part of MagQuest, a competition run by the U.S. National Geospatial-Intelligence Agency (NGA) to find better ways to measure Earth's magnetic field for navigation.
The magnetometer uses NV centers — atomic-scale defects in synthetic diamond — as tiny magnetic field sensors. When illuminated with green light, the defects fluoresce in ways that encode the local magnetic field strength. The crystal provides four independent sensing axes in a volume roughly the size of a quart of milk, a form factor that would be difficult to achieve with conventional magnetometer technology, according to a technical description from Element Six, the synthetic diamond supplier working with SBQuantum. Quantum Computing Report The goal is to demonstrate sensitivity below 100 picotesla — roughly one million times weaker than Earth's field — which would be compass-grade performance suitable as a heading reference for navigation systems. IEEE Spectrum
That target is where most quantum sensing stories stall. Laboratory NV magnetometers routinely achieve impressive sensitivity numbers on optical tables; translating that to radiation-hardened, power-constrained orbital hardware is a different engineering problem entirely. The March 30 launch is the beginning of an answer, not the end of one. MagQuest's final phase is anticipated to conclude in September 2026, when an expert review panel will evaluate results across all three finalist teams. NGA
The competition has drawn three teams with substantially different approaches. Spire and SBQuantum are flying a diamond NV magnetometer. The University of Colorado Boulder's Compact Spaceborne Magnetic Observatory (COSMO) is a CubeSat-based conventional magnetometer. Iota Technology, a UK firm, is the third finalist. MagQuest These are not equivalent technical bets — a quantum sensor and a carefully engineered classical sensor can target the same measurement, but the failure modes and calibration challenges differ completely. Readers should not mistake the competition for a pure head-to-head demo; the evaluation criteria matter.
The underlying need is real. The World Magnetic Model (WMM) is a joint product of the NGA and the UK Defence Geographic Centre, produced by NOAA and the British Geological Survey, that serves as the reference for magnetic heading in military and civilian navigation systems worldwide. NGA It is unglamorous infrastructure — the kind that works quietly until it doesn't. Better magnetic field data collected from orbit would improve the model's accuracy, and quantum magnetometers in principle offer stability advantages over conventional sensors for long-duration missions. Whether SBQuantum's hardware delivers on that in practice is what MagQuest is designed to test.
David Roy-Guay, SBQuantum's founder and chief executive, called reaching the final phase of MagQuest "the most significant technical milestone in our company history," in a statement reported by SpaceNews. SpaceNews The company has prior credibility: it holds a 21-month prototype contract with the European Space Agency worth roughly $1 million (800,000 euros) for quantum diamond magnetometer development, as IEEE Spectrum reported. IEEE Spectrum That is not nothing — ESA does not fund vaporware. But an ESA prototype contract and an operational orbital demonstration are different things, and the gap between them is where most quantum sensing companies discover unexpected problems.
There is also a national strategy layer. In Canada, where SBQuantum is based, the Defence Industrial Strategy recently designated quantum sensors as one of ten Key Sovereign Capabilities — a recognition that quantum navigation and sensing hardware is treated as strategic infrastructure by Ottawa, not just a commercial product line. The Quantum Insider Whether that designation translates into procurement contracts depends partly on whether the MagQuest data looks good.
The prize structure reflects the competition's scale. The NGA has awarded $2.1 million across the first three phases of MagQuest since 2019, with each of the three Phase 4 finalists receiving a $1.55 million incentive prize purse. The Quantum Insider The Phase 4 results are expected to inform the NGA's acquisition strategy for a WMM data collection capability with an operational target of 2030. NGA
What to watch: the first telemetry from the SBQuantum sensor, expected in the weeks after the March 30 launch. Calibrated magnetic field readings from orbit — not just proof that the sensor survived launch — will be the real data point. The NV center approach has genuine physical advantages in size and long-term calibration stability. Whether it survives contact with the space environment is the question that matters now.
