... for this declination. In order to investigate the geoenvironmental condition of the Ariake Sea a regular monitoring was carried out both in the tidal flat area and inside the sea from 2002 to date. Some predetermined sampling points fixed by global positioning system (GPS), were selected for collecting the mud sample...

... bihourly data through yearlong deployments, use precision heading reference systems to measure the orientation of Acoustic Doppler Current Profilers mounted in streamlined buoyancy packages. Current directions are then corrected for the significant fluctuations in magnetic declination occurring near...