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BQ 3A News > Blog > UK > Quantum choice to GPS navigation can be examined on US army spaceplane
UK

Quantum choice to GPS navigation can be examined on US army spaceplane

August 14, 2025
Quantum choice to GPS navigation can be examined on US army spaceplane
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A US army space-plane, the X-37B orbital take a look at automobile, is because of embark on its 8th flight into area on August 21 2025. A lot of what the X-37B does in area is secret. Nevertheless it serves partially as a platform for state of the art experiments.

This sort of experiments is a possible choice to GPS that uses quantum science as a device for navigation: a quantum inertial sensor.

Satellite tv for pc-based methods like GPS are ubiquitous in our day-to-day lives, from smartphone maps to aviation and logistics. However GPS isn’t to be had in all places. This generation may just revolutionise how spacecraft, airplanes, ships and submarines navigate in environments the place GPS is unavailable or compromised.

In area, particularly past Earth’s orbit, GPS indicators turn into unreliable or just vanish. The similar applies underwater, the place submarines can’t get right of entry to GPS in any respect. Or even on Earth, GPS indicators will also be jammed (blocked), spoofed (creating a GPS receiver assume it’s in a unique location) or disabled – as an example, right through a battle.

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This makes navigation with out GPS a crucial problem. In such situations, having navigation methods that serve as independently of any exterior indicators turns into crucial.

Conventional inertial navigation methods (INS), which use accelerometers and gyroscopes to measure a automobile’s acceleration and rotation, do supply unbiased navigation, as they are able to estimate place by means of monitoring how the automobile strikes over the years. Recall to mind sitting in a automotive together with your eyes closed: you’ll be able to nonetheless really feel turns, stops and accelerations, which your mind integrates to bet the place you’re over the years.

Sooner or later despite the fact that, with out visible cues, small mistakes will acquire and you’ll solely lose your positioning. The similar is going with classical inertial navigation methods: as small dimension mistakes acquire, they steadily float off route, and wish corrections from GPS or different exterior indicators.

The place quantum is helping

If you happen to call to mind quantum physics, what would possibly come for your thoughts is a abnormal global the place debris behave like waves and Schrödinger’s cat is each useless and alive. Those concept experiments actually describe how tiny debris like atoms behave.

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At very low temperatures, atoms obey the foundations of quantum mechanics: they behave like waves and will exist in more than one states concurrently – two homes that lie on the center of quantum inertial sensors.

The quantum inertial sensor aboard the X‑37B makes use of one way known as atom interferometry, the place atoms are cooled to the temperature of close to absolute 0, in order that they behave like waves. The use of fine-tuned lasers, each and every atom is divided into what’s known as a superposition state, very similar to Schrödinger’s cat, in order that it concurrently travels alongside two paths, which might be then recombined.

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GPS methods will also be jammed, spoofed or disabled.
Lockheed Martin and U.S. Area Pressure, Creator equipped (no reuse)

For the reason that atom behaves like a wave in quantum mechanics, those two paths intervene with each and every different, making a development very similar to overlapping ripples on water. Encoded on this development is detailed details about how the atom’s atmosphere has affected its adventure. Specifically, the tiniest shifts in movement, like sensor rotations or accelerations, go away detectable marks on those atomic “waves”.

In comparison to classical inertial navigation methods, quantum sensors be offering orders of magnitude higher sensitivity. As a result of atoms are equivalent and don’t alternate, not like mechanical elements or electronics, they’re a long way much less susceptible to float or bias. The result’s lengthy length and excessive accuracy navigation with out the will for exterior references.

The impending X‑37B venture would be the first time this stage of quantum inertial navigation is examined in area. Earlier missions, corresponding to Nasa’s Chilly Atom Laboratory and German Area Company’s MAIUS-1, have flown atom interferometers in orbit or suborbital flights and effectively demonstrated the physics at the back of atom interferometry in area, despite the fact that now not particularly for navigation functions.

In contrast, the X‑37B experiment is designed as a compact, high-performance, resilient inertial navigation unit for genuine global, long-duration missions. It strikes atom interferometry out of the geographical regions of natural science and into a sensible utility for aerospace. It is a large jump.

This has essential implications for each army and civilian spaceflight. For the USA Area Pressure, it represents a step against higher operational resilience, specifically in situations the place GPS could be denied. For long run area exploration, corresponding to to the Moon, Mars and even deep area, the place autonomy is vital, a quantum navigation machine may just serve now not best as a competent backup however whilst a number one machine when indicators from Earth are unavailable.

X-37B

The X-37B is being ready for its 8th flight.
US Area Pressure

Quantum navigation is only one a part of the present, broader wave of quantum applied sciences shifting from lab analysis into real-world programs. Whilst quantum computing and quantum verbal exchange continuously scouse borrow headlines, methods like quantum clocks and quantum sensors usually are the primary to peer common use.

Nations together with the USA, China and the United Kingdom are making an investment closely in quantum inertial sensing, with fresh airborne and submarine assessments appearing sturdy promise. In 2024, Boeing and AOSense performed the arena’s first in-flight quantum inertial navigation take a look at aboard a crewed airplane.

This demonstrated steady GPS-free navigation for about 4 hours. That very same 12 months, the United Kingdom performed its first publicly stated quantum navigation flight take a look at on a industrial airplane.

This summer season, the X‑37B venture will deliver those advances into area. On account of its army nature, the take a look at may just stay quiet and unpublicised. But when it succeeds, it might be remembered as the instant area navigation took a quantum jump ahead.

TAGGED:alternativeGPSmilitarynavigationquantumspaceplanetested
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