Checking the Positional Invariance of Planck's Consant Using GPS

Given that h is very small (1e-15, 1e-34 or 1e-27 depending on units), a limit of.007 seems rather large.

Considering NIST in Washington, NRC in Ottawa, NPL in London, and METAS in Berne (all national metrology labs) have directly measured h to within 300 parts in a billion (1E9), this is an unusual report. Those results are within a relative limit of 0.0000003.

Planck's constant cannot be measured with only a GPS or atomic clock, so this is at best some comparative result.

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/byO0xOdlaoA/checking-the-positional-invariance-of-plancks-consant-using-gps

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