ast, discarding measurements made in
the air, in an equilibration phase in which the device is held below the water surface, and then the
upcast phase that follows the downcast.  This is handled reasonably well by ctdTrim with
method="downcast", although it is almost always best to use plotScan() to
investigate the data, and then use the method="index" or method="scan" method based on
visual inspection of the data.'></head><body>
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