The Spectacular Advanced IRS1 Blueprint Detected By My Buddy

These were then integrated to obtain a horizontal velocity profile relative to an unknown constant of integration. The profile was then referenced to bottom track absolute velocity derived from LADCP measurements IRS1 within range of the bottom or ship drift over the time of the cast as determined from navigation data. The LADCP processing techniques were later further developed to allow for the use of multiple referencing constraints. The ��inverse method�� involves solving a set of linear equations to separate ocean and instrument velocities while applying a combination of velocity referencing constraints (Visbeck, 2002). Bottom tracking and navigation data were used as constraints for the inverse solution in most cases. Two of the cruises also used shipboard ADCP as a constraint. In a few cases, some stations did not have adequate bottom tracking to be included as a constraint. Depth of the package was usually obtained from the CTD pressure sensor (or by integrating vertical velocity if sensor was unavailable). GPS data were collected concurrently with the CTD to avoid possible Rapamycin nmr clock mismatch related errors. Compass calibration of the ADCP was performed prior to each cruise. Using the inverse method with at least two referencing constraints simultaneously has been found to yield rms velocity errors of Epigenetics inhibitor topography (Lazier et al., 2002). Additional stations may be occupied in strong mesoscale eddies or other features of interest. Inconsistent coverage of the line may occur due to inclement weather, instrument problems, or other delays. LADCP data over the broad shelf at the southwestern end of the line are available for only two occupations (2001, 2003). In 1998, dense ice coverage prevented data acquisition at the far northeastern end of the line, so the boundary current there was missed. Nevertheless, a fairly robust picture of the absolute velocity field has emerged by considering the available data from six occupations of the AR7W line. In this paper, the primary focus is on velocity fields derived from the LADCP data alone.