Time series plots of rosette heading
The Lowered ADCP is an acoustic device which is attached to the CTD
rosette frame. It is lowered along with teh CTD and stores measured
velocities along its 4 beams by using the Doppler shift of the return
signal. With the help of an internal compass, gps position, and alot
of geometry, we can reconstruct a profile of ocean currents during a
CTD cast. These figures are generated as part of the LADCP
processesing procedure.
All panels are plotted with time (in
decimal day) along the horizontal axis. Each panel is one variable:
depth (z) , measured velocity to the east (U), measured velocity to
the north (V), vertical velocity (W), heading, pitch, roll, and
temperature. Heading is magnetic compass degrees, so a heading which
decreases to the right indicates a package spinning counterclockwise.
As with a compass, zero degrees is the same as 360 degrees, so many of
the apparent spikes in heading are nothing more than the package
repeatedly rotating past zeros.
In Port: Iceland
New wire
In Port: Madiera
