13 Use of SAR data to Monitor the Greater Agulhas Current
255
Fig. 13.2 Mean range Doppler velocities of the Agulhas Current derived from more than 600
ascending Envisat ASAR WSM acquisitions from mid-2007 to mid-2011. The color bar marks the
speed in m/s with warm (cold) colors being directed towards west (east)
13.3 Intercomparison and Assessment
13.3.1 Surface drifter data
Using existing surface drifter data
3 the range Doppler based surface velocity estimates can be assessed as shown in Fig. 13.3. The corresponding trajectories of the
drifters converge and closely follow the pathway of the core of the Agulhas Current
3 Available at http://www.aoml.noaa.gov/phod/dac/gdp.html.
255
Fig. 13.2 Mean range Doppler velocities of the Agulhas Current derived from more than 600
ascending Envisat ASAR WSM acquisitions from mid-2007 to mid-2011. The color bar marks the
speed in m/s with warm (cold) colors being directed towards west (east)
13.3 Intercomparison and Assessment
13.3.1 Surface drifter data
Using existing surface drifter data
3 the range Doppler based surface velocity estimates can be assessed as shown in Fig. 13.3. The corresponding trajectories of the
drifters converge and closely follow the pathway of the core of the Agulhas Current
3 Available at http://www.aoml.noaa.gov/phod/dac/gdp.html.