SAR wave mode provides two-dimensional spectra of ocean surface waves. For this function the SAR records regularly spaced samples within the image swath. The images are transformed into directional spectra providing information about wavelength and direction of wave systems. Automatic measurements of dominant wavelengths and directions will improve sea forecast models, but the imagettes can also show the effects of other phenomena, such as internal waves, slicks, small scale variations in wind and modulations due to surface currents and the presence of sea ice.
ESA makes freely available to the user community a dataset of (A)SAR
products (Envisat and ERS) corresponding to the earthquake of Haiti which
took place on 12 January 2010. Information on the dataset is available on
the Earth Watching web site. Population of
the archive is still ongoing.
A GEO Supersite portal for Haiti has also been set up in cooperation with
ESA containing the above mentioned dataset, other data and related
ESA offers free access to the Virtual Archive also to other data providers
allowing data sharing in line with the GEO principles. This infrastructure
is supporting the download of very high data volumes performed simultaneously.