Symbol Omega

The passage around this formula

…comparable to the geographic span already reached by real international fibre links — at a latitude where the projected area onto Earth’s equatorial plane is close to the full value. With Earth’s sidereal rotation rate $\Omega$ $\approx$ 7.292$\times$10^{-5}\,$\mathrm{rad\,s^{-1}}$ [ 10 ] , the accumulated timing offset is $\Delta$ t = 2$\Omega$ A/$c^2$ $\approx$ 2(7.292$\times$10^{-5})(2.5$\times$10^{11})/(8.988$\times$10^{16}) $\approx$ 4.1$\times$10^{-10}\,$\mathrm s$ , a little over four hundred picoseconds. Gated at the one-second…

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