Ionospheric Phase Screen and Ionospheric Azimuth Shift Estimation Combining the Split-Spectrum and Multi-Squint Methods

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: PDF

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Gomba, Giorgio; De Zan, Francesco; Parizzi, Alessandro (German Aerospace Center (DLR), Germany)

This paper presents a new method that improves the estimation of ionospheric phase screens, with respect to the split-spectrum method, and that is able to separate ground- from ionosphere-induced azimuth motion. It is based on a Bayesian combination of two single ionospheric phase screen estimates. One is obtained with the split-spectrum method; the other using the double derivative of the azimuth ionospheric variation, extracted from differential multisquint interferograms. In order to show the applicability of the method, preliminary results are presented.