There is a response to this paper on the journal website: https://www.science.org/doi/10.1126/science.adg2565#elettersSection https://www.science.org/doi/10.112

There is a response to this paper on the journal website: https://www.science.org/doi/10.1126/science.adg2565#elettersSection https://www.science.org/doi/10.1126/science.adg2565#eletters... (the eLetters section), which claims the signal from GPS is just noise.