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World's first GPS-free quantum navigation trial succeeds at sea (interestingengineering.com)
submitted 2 months ago by to c/technology@lemmy.world
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[–] 5 points 2 months ago (1 child)

The only thing I can think is that they're comparing with a single system (e.g. GPS or BeiDou), even though GNSS receivers will combine all four systems to get very high accuracy (a few metres).

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  • [–] 10 points 2 months ago

    They are comparing purely inertial navigation (I assume using the advanced nav boreas D90) and inertial nav combined with gravity map matching.

    It is more of a demonstration than a comparison. Pure inertial nav has no way to re zero from an external reference so the error only grows.

    Both of these systems are worse than any form of sat nav. But both of them keep working if the sat nav is jammed.

    https://doi.org/10.48550/arXiv.2608.25563

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