Geoscience Reference
In-Depth Information
Level measurements are carried out in a shaft connected with the ocean by a rela-
tively thin pipe. Such a scheme permits to automatically filter out high-frequency-
level oscillations, related to wind waves.
A standard modern telemetric complex for controlling the ocean level (and for
tsunami registration) is composed of a traditional registrator (mareograph), a foot-
stock, and, also, means for collecting and transmitting data (see Fig. 6.2). About 70
such complexes have been established on the coasts of many countries, joined in
the International Pacific Tsunami Warning System, for instance, in the harbours of
Severo-Kurilsk and Ust-Kamchatsk of the Far-East region of Russia.
Fig. 6.2 Layout of modern standard complex of Pacific Tsunami Warning Service. 1—differential
(incremental) coding device (Handar), 2—Leopold-Stevens device with analog-to-digital registra-
tor, 3—pressure transformer, 4—satellite platform for data collection (Handar), 5—satellite an-
tenna (GOES), 6—solar batteries, 7—wave damper (mareographic shaft), 8—footstock
