Fróðskaparrit - 01.01.1975, Qupperneq 36

Fróðskaparrit - 01.01.1975, Qupperneq 36
44 Earth Tides VM horizontal quartz pendulums have given very consi- stent results in EW component, for the diurnal tidal waves called Ki (period 1 sidereal day), Pi (period 1 solar day) and Oi (period 1 lunar day). Oi is practically static and not disturbed by indirect oceanic effects. Mean values for 14 stations (18.056 days of observations) are just now: 7 (Ki) 7 (Oi) arithmetic mean 0.7429 0.6788 weight is number of days 0.7449 0.6797 weight according to m. s. e. 0.7494 0.6759 m. s. e. on the mean 0.0045 0.0056 in agreement with a Molodensky Earth’s model with a liquid core. For gravimeters the situation is more complex because some instruments, although excellent, seem to have been un- correctly calibrated. After some discussion and eliminations, I got for 18 stations (10.512 days of observation): 4 (Ki) <5 (Oi) arithmetic mean 1.1485 1.1628 weight is number of days 1.1466 1.1627 weight according to m. s. e. 1.1327 1.1638 m. s. e. on the mean 0.0028 0.0008 also in agreement with Molodensky model. From these data we can derive following values: Ki Oi h k k/h h k k/h arithmetic mean 0.474 0.217 0.458 0.638 0.317 0.497 number of days weight 0.458 0.208 0.454 0.647 0.323 0.499 m. s. e. weight 0.486 0.236 0.485 0.645 0.321 0.497 m. s. e. on h is nearly 0.016 on k 0.010 on k/h 0.024 As a theoretical relation gives (for C/Ma2 = 0,333): k/h = 0.4989
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