project aimed to design and implement a protype generic Marine
SAR Analysis and Interpretation System (MARSAIS) with sufficient
product accuracy and optimum resolution for specific application to the
coastal and marine environment. This was achieved by generating a series
of MARSAIS sub-systems including:
MARSAIS Prototype - a web based demonstrator
The prototype contains products, data sources, algorithms
and models, validation information, introductory and didactic material
for SAR data and other EO data. The prototype is implemented in HTML,
The prototype web site also contains additional material
in the form of fact sheets on each of the focus applications of MARSAIS.
The content of the prototype site is applicable to a wide range of end
users e.g. students, novices, experts, researchers.
· Wind and Waves
SAR data can provide detailed quantitative local wind information. MARSAIS
validated algorithms (CMOD-4 & CMOD-IFR2) for the extraction of wind
speed from ERS SAR & Envisat ASAR data. For waves, MARSAIS developed
and validated a new algorithm (ENVIWAVE) for the extraction of wave parameters
(height, direction and period) from Envisat ASAR. data.
· Current and Frontal Features
A direct outcome from MARSAIS are new algorithms for the estimation of
surface current parameters across ocean fronts and internal waves. SAR
data can provide current feature estimates including, surface current
gradients over shallow water bathymetry, converging and diverging current
systems, mesoscale eddies and internal waves.
Within MARSAIS enhanced algorithms for the detection and classification
of oil spills were developed and validated for both ESR SAR & Envisat
ASAR imagery. In addition, an oil drift model was successfully developed
and validated for the eastern Mediterranean Sea.
The combination of data from several sensors and satellites can make an
important contribution to coastal & marine monitoring. As well as
increasing the spatial and temporal coverage, this synergy also offers
opportunities to advance the analysis and interpretation of remote sensing
data. MARSAIS produced an interactive toolkit developed for comparative
analysis of multi-source satellite date (radar, visual & IR).
A pivotal component of MARSAIS was the assessment of user requirements
for SAR data in the coastal and marine environment, undertaken by the
CMRC. MARSAIS identified and involved potential end users of SAR data
and generated end user feedback which in turn was fed into the development
of an operational MARSAIS prototype focusing on sea state, (wind and wave),
oil spills/slicks, surface currents (and internal waves) and synergy.
MARSAIS generated end user feedback and fostered interaction
with end users from the coastal and marine community by:
Disseminating a questionnaire on the use of SAR
Communicating directly with individuals via phone/e-mail
and utilising mailing lists to promote MARSAIS activities.
Attending conferences and trade events over the
course of the project.
Hosting three dedicated workshops on the use of
SAR data in the coastal and marine environment.
The following are some key results:
The issue of cost was cited as a significant limiting
factor in the use of SAR data.
Capability (training and skills) and capacity
(infrastructure) also influence the use of SAR data in the coastal
and marine environment.
There is potential for the further development
of SAR data. This potential can be realised through continued basic
and applied research into SAR applications in the coastal and marine
The examination of current features, shallow water
bathymetry and pollution incidents were the preferred applications.
The findings and recommendations
to emerge from MARSAIS are of relevance to GMES. Detailed analysis of
the end user feedback is contained in the