Kein Folientitel

1
Splinter Session Report on
Current Features
by Roland Romeiser Susanne Ufermann and others
2
Progress Since Last Workshop
? Implementation, improvement, use of operational
services ? "Bathymetry Assessment System"
(limited applicabilty) ? Operational image
analysis (fronts, eddies, slicks,
...) ? Implementation demonstration of
automated pre-operational inversion algorithms
(internal waves, fronts, ...) ? User requirements
analyses (EuroGOOS, MARSAIS, GMES, NPOESS / IPO,
...) ? Forward model improvements (wave breaking,
...) ? Implementation of new data analysis
techniques (Doppler centroid, ...) ? New sensors
/ sensor designs and imaging modes (ASAR
AP-Mode, TerraSAR-X split antenna mode, ...)
3
Existing Applications
? Bathymetry Assessment System (limited to water
depths below 30m, strong tidal currents
required, limited wind range, etc.) ? Users
Coastal management authorities,
Netherlands ? Operational and pre-operational
image analysis (fronts, eddies, slicks, ship
traffic monitoring) ? Norwegian Navy ? UK
Hydrographic Office ? Petrobras (oil
spills) ? Japan (fisheries) ? US Navy
? Oceanographic research
4
Possible Desirable Applications(with existing
sensors)
? Mapping coastal current features, fronts,
eddies, slicks ? Internal wave climatology ? Globa
l surface current mapping from existing data
sets ? Improved understanding of coupled physical
and biogeochemical processes using synergy (SAR
/ models, SAR / other sensors)
5
Potential Future Applications
? Mapping 2d current fields at high resolution
for ? defense ? public safety ? search
rescue ? hydrology, pollution ? prediction of
oil spill movements ? fisheries ? recreational
use ? validation of models ? Real-time
monitoring ? Assimilation of derived currents at
improved temporal coverage
6
Available Tools
? Validated tools ? Some general feature
detection algorithms ? Some forward model
packages ? Multi-temporal image analysis
tools ? Experimental tools ? Algorithms for
internal waves, fronts, etc. ? Doppler centroid
method ? Along-track interferometry
7
Tool / Algorithm Requirements
? Ease of use, multiple I/O formats (GIS
compatible) ? Wide distribution (promotion and
training) ? Robustness, reliability ? Applicabilit
y, validity, accuracy ? Computational
efficiency ? Availability of auxiliary
data ? Improved physical models (consistent
currents, winds, waves) ? Synergy (SAR / SAR, SAR
/ models, SAR / other sensors)
8
Future Sensor Requirements
? Continuity... ? Temporal coverage /
resolution... ? Spatial coverage / resolution
Wide swath, ScanSAR... ? Different frequency
preferences for different applications (e.g., L
band for current gradient retrieval from
intensity images, high frequencies for
interferometry) ? Polarization HH and VV for
distinguishing between signatures of oceanic and
atmospheric phenomena ? Incidence
angle... ? Along-track interferometry for
high-resolution currents
.