SAR-data on environment and ship traffic, validated by voyage data recorder (VDR) data in the SatMes-project
Wolfgang Rosenthal(1), Birgit Suhr(1), Andreas Born(1) and Susanne Lehner(2)
(1) Co. Gauss, Werderstr. 73, D 28199 Bremen, Germany
(2) DLR, Oberpfaffenhofen, D 82234 Wessling, Germany
In the near future ship speed and current velocities will be measured from space by SAR and by interferometric methods. Validation of these measurements is difficult to organize if conventional point measurements have to be compared. A useful method for coastal areas will be the measurement of currents by HF-radar. In this paper we show how satellite measured currents from a radar sensor can be validated by voyage data recorders (VDR) of vessels present in the radar scene. The aim of this paper is to explain the advantage of comparing SAR-data with the voyage data recorder (VDR) time series and coastal automatic identification system (AIS) data. The radar data used in given examples are from the TerraSAR-X (TSX) satellite of DLR. A strategy for the combination of the the deifferent data types will be outlined. First results will be presented and the potentials and limitations will be summarized. A comparison and validation of the different recorded data of the known ship characteristics (size, heading, speed, etc.) will be given. The availability and utility of auxiliary data (wind speed and direction, current) will be examined. The relevance for planning ship routes will be discussed.
Keywords: synthetic aperture radar (SAR), ship routing, automatic identification system (AIS), voyage data recorder (VDR)