Indeed.

>The system deduces the strength of Earth’s gravity in every given point of the journey from the motion of the atoms illuminated by laser beams inside a vacuum chamber and compares that data with gravity maps compiled from satellite measurements.

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arethuza a day ago | parent [-]

Is that like TERCOM but using strength of gravity rather than terrain height?

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kklisura a day ago | parent | next [-]

Yup, I was just about to comment the same. I find it shocking that there's enough information/variation in gravitational field that you can match on.

	▲	adrian_b a day ago \| parent \| next [-]
		The variation is very small, and that is why it can be exploited only with an extraordinarily sensitive gravimeter, like the one discussed in the article.
	▲	actionfromafar a day ago \| parent \| prev [-]
		Very Star Trek technobabble vibes, except for real!

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i_am_proteus a day ago | parent | prev [-]

Precisely.