Fróðskaparrit - 01.01.1975, Page 31

Earth Tides
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Niels Breiner fra laboratoriet. Det daglige tilsyn med male-
stationen blev varetaget af premierløjtnant C. Jacobsen fra
flyvestation Thorshavn. Registreringerne blev med regelmæs-
sige meilemrum sendt til centret i Bruxelles, hvor hele bereg-
ningsprocessen finder sted pá computer og efter et internatio-
nalt vedtaget regneprogram. Et eksempel pá databehandlingen
ses i figur 3. Station 0821 Faeroe var i funktion i den sidste
halvdel af 1973.
Earth Tides in 1974
By P. Melchior.
A. Introduction
The Earth tides research field has been much enlarged since
1957 when, with the impulse of the International Geophysical
Year, a program was developed for the continuous registration
of this phenomenon.
At that epoch, the problem could be considered as restricted
to some special investigation on the physics of the Earth’s
interior. Its importance resulted from the fact that it is the
only known geophysical phenomenon for which one is able to
compute a priori, and with very high precision, the acting
forces as well as their frequencies (tidal frequencies are known
with eight digits exact!). Owing to the smallness of the mea-
sured amplitudes, it seemed however to be without real pratical
meaning for other research fields.
The development of new techniques, with always higher
precision requirements has radically changed this view in the
six different fields as described here:
1. Fundamental Astronomy
The unicity of the precession-nutations phenomenon and
of the diurnal tesseral earth tides has been understood and