R D Ray, Updated model of short-period tidal variations in Earth rotation, IERS Tech. Note No. 28, in press, 2000.
R D Ray, A global ocean tide model from Topex/Poseidon altimetry: GOT99.2, NASA Tech. Memo. 209478, Goddard Space Flight Center, 58 pp., 1999.
These harmonic constants for tidal variations in rotation rate and polar motion correspond to the GOT99.2 tide model of Ray (1999). (Note: GOT = Goddard/Grenoble Ocean Tide.) The data are primarily based on the tidal analyses of 6 years of Topex/Poseidon altimeter data, supplemented with several hydrodynamic models in shallow and polar seas. See Ray (1999) for details on model development, as well as for comparisons of the model with tide gauge measurements.
Each pair of numbers below is an amplitude and a phase lag. Amplitude units for UT are microseconds. Amplitude units for polar motion are microarcseconds. Phase units are degrees.
TIDAL VARIATIONS IN UT1
Q1 O1 P1 K1
----- ----- ----- -----
Tidal currents 3.8 19 16.8 28 6.6 39 20.1 40
Tidal heights 1.6 44 4.3 61 0.8 310 2.8 301
TOTAL 5.2 26 20.5 35 6.7 32 19.8 32
N2 M2 S2 K2
----- ----- ----- -----
Tidal currents 4.2 238 21.8 231 9.4 252 2.8 252
Tidal heights 0.5 348 6.2 356 2.4 43 0.7 31
TOTAL 4.0 244 18.9 246 7.4 262 2.3 263
TIDAL VARIATIONS IN PROGRADE POLAR MOTION
Q1 O1 P1 K1
----- ----- ----- -----
Tidal currents 0.1 209 28.3 88 16.1 89 47.0 90
Tidal heights 28.9 76 113.2 60 44.4 46 132.6 44
TOTAL 28.9 76 138.8 65 57.2 57 168.6 56
N2 M2 S2 K2
----- ----- ----- -----
Tidal currents 11.8 112 80.5 112 44.1 80 12.4 82
Tidal heights 6.7 181 17.5 205 17.0 239 5.0 246
TOTAL 15.5 136 81.6 125 28.9 92 7.7 92
TIDAL VARIATIONS IN RETROGRADE POLAR MOTION
Q1 O1 P1 K1
----- ----- ----- -----
Tidal currents 31.3 296 142.2 310 77 281 192 285
Tidal heights 13.1 317 41.0 136 946 132 10010 131
TOTAL 43.8 302 101.5 307 880 134 9840 132
N2 M2 S2 K2
----- ----- ----- -----
Tidal currents 35.9 247 280.9 255 144.9 295 39.3 292
Tidal heights 13.7 341 72.4 22 28.5 82 9.2 76
TOTAL 37.5 269 244.8 269 122.2 303 32.3 301