Lunar tidal acceleration from Earth satellite orbit analyses

We present results for the M2 and O1 ocean tides based on the Starlette satellite orbit analyses from which the tidal acceleration of the moon is derived. The solution for M2 is consistent with previous satellite solutions; for O1 we find a phase lag which is approximately zero. The uncertainty is still large, but there is an indication that the tidal dissipation at the O1 frequency is small. Using the weighted mean value of the best satellite solutions gives = −21.32 ± 1.25 arc sec/(century)2 for the total dissipation in the earth at the M2 frequency. In principle, comparison between derived from satellite solution and derived from numerical models gives the amount of dissipation in the solid earth, but uncertainties are still too large to give a reliable estimate of the tidal mantle Q.

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