Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
3. Tides on the MoonLUNAR MOMENTS, TIDES, ORIENTATION, AND COORI)lNATE FRAMES
The attraction of the Earth raises solid-body tides on the Moon. The
Moon keeps
one face toward the Earth, but there are still time-varying tides due to
0.1 radian
variations in the apparent direction of the Earth (both latitude and
longitude) and
variation in the distance. The time-varying radial tidal displacement is
about 0.1 m,
Each of the three causes has a 0.1 m maximum effect at a different
location on the Moon.
The two dominant periods are 27,55 d (period of mean anomaly) and 27.21 d
(period of
node crossings). This is large enough to affect the Lunar Laser Ranging
data and is accounted for in the analysis, but it is less of a concern
for altimetry.