kind of research has been carried out by seaborne measurement campaigns.
Such campaigns are expensive and miss much of the real picture,
since measurements can be taken at only one location at a time.
Satellites can complement such campaigns by providing images of
the entire region at a single time, and can fill in the gaps between
seaborne campaigns with additional imagery.
Dredging operations are necessary to keep the approach to ports
deep enough for shipping, but their cost is high. Research into
the study of sediment movements near the coast can help optimise
such operations. Such research, carried out using computer simulations
and seaborne measurements, is facilitated by satellite imagery of
for this project comes from the NOAA-AVHRR
series of satellites (from which suspended sediments and sea surface
temperature can be deduced) and from the SeaStar-SeaWiFS sensor
(suspended sediments and chlorophyll). The SeaWiFS
sensor measures the intensity of light at
a number of distinct wavelengths. These images show measurements
made for blue (left) and red (right) wavelengths. The images are
shown with a grey scale for intensity: the stronger the signal,
the whiter the image. This image shows a false colour SeaWIFS image
obtained by combining measurements at blue, green and red wavelengths.
This basis is being extended to a large range of current and future
optical remote sensors (MOS, LANDSAT, SPOT, MODIS, MERIS) using
a generic methodology.
Auxiliary data for atmospheric and whitecap corrections comes from
meteorological observations, and calibration/validation data is
obtained by measurements made at sea using the Research Vessel Belgica.
Measurement of water colour is made at sea using a hand-held spectroradiometer.
Such measurements are used to validate the mathematical model describing
ocean colour as a function of chlorophyll and suspended sediment