Improving SAR-MTI Detection Capacities by Adaptive Antennas Calibration
Konferenz: EUSAR 2016 - 11th European Conference on Synthetic Aperture Radar
06.06.2016 - 09.06.2016 in Hamburg, Germany
Tagungsband: EUSAR 2016
Seiten: 4Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Taylor, Abigael; Oriot, Helene; Savy, Laurent (ONERA – The French Aerospace Lab, SATIE ENS Cachan, France)
Daout, Franck; Forster, Philippe (SATIE ENS Cachan, France)
In the context of ground surveillance, moving targets detection and localization are key issues. Recently, SAR/GMTI algorithms involving several antennas have been proposed. However, the antennas may have different antenna patterns, and they point to a direction with slightly different angles. These difference evolve dissimilarly as the aircraft moves along the azimuth direction, causing a loss of coherence between the obtained images. This loss of coherence causes a loss in detection capacities. In this paper, we propose a method of recalibrating the antennas with respect to one another. This method does not require any a priori knowledge on the antennas, and enables an improvement of the detection capacities.