|TSM/TDM Science Team Meeting 2016|
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|TanDEM-X Science Service System|
|Title||The potential of TerraSAR-X dual-polarization data for dedicated tasks in sea-ice remote sensing|
|Investigator||Stammer, Detlef - University of Hamburg, Inst. fuer Meereskunde|
|Team Members||No team members defined|
During summer no young ice is present so that any change in the co-polarization ratio observed at either of the bands (L- to Ku) could be attributed to a change in the melt-pond fraction – provided that the ice concentration is close to 100% and does not change. It will be investigated, which frequency would give the best result with regard to accuracy, the minimum observable melt-pond cover fraction (change), influence by changes in ice type and degree of deformation, and change in surface wind speed.
One backbone for these goals are helicopter-borne multi-frequency, multi-polarization scatterometer measurements at L-, C-, X-, and Ku-Band with the HELISCAT instrument [Kern and Gade, 2004] carried out during field campaigns as simultaneous as possible to overpasses of relevant satellite sensors. Together with in-situ measurements of snow and ice properties, and air-borne VIS-reflectance / IR-temperature measurements, HELISCAT data will be used to develop methods to obtain the thin-ice thickness, identify (and map) frost flowers, and identify (and map) melt ponds and derive the sea-ice albedo. It will be investigated, to which extent X-Band data are a necessary component of these methods which in a next step will be modified to be applied to satellite data. Synchronous HELISCAT and TerraSAR-X data are needed for this modification and to evaluate the resulting methods.
The second backbone are preparatory multi-sensor studies involving multi-frequency satellite active microwave data available at the date for two key regions. These studies shall provide information about most suitable incidence angles (probably above 40°) and frequency combinations to accomplish above-mentioned goals. These studies are a preparation for the field campaigns and the modification of the methods from using airborne to satellite data.
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