Attenuation data, Nov. 5-12, 1996.
days since Jan 1 1970 0:00:00 GMT, rms of signal A, rms of signal B
9805.63779,  9.56, 11.20
9805.63813, 10.07, 11.22
9805.63846,  8.90, 11.10
9805.63880,  8.48, 11.09
9805.63923,  8.03, 11.17
9805.63976,  6.11, 11.09