High-resolution estimation of ionospheric phase screens through semi-focusing processing

Author

Gomba, Giorgio ; Eineder, Michael ; Parizzi, Alessandro ; Bamler, Richard

Author_Institution

German Aerosp. Center (DLR), Remote Sensing Technol. Inst., Wessling, Germany

fYear

2014

fDate

13-18 July 2014

Firstpage

17

Lastpage

20

Abstract

Ionosphere irregularities along the synthetic aperture generate shifts and blurring that cause decorrelation. In this paper it is shown how, by partially focusing SAR images to the height of the ionosphere, it is possible to reduce the ionospheric azimuth effects and increase the coherence. This permits, even in case of turbulent ionosphere, to obtain better accuracies when separating the deformations phase from the ionospheric phase using the delta-k split-band interferometry method.

Keywords

geophysical techniques; ionospheric electromagnetic wave propagation; radar imaging; radar interferometry; remote sensing by radar; synthetic aperture radar; SAR images; blurring; coherence; decorrelation; delta-k split-band interferometry method; high-resolution estimation; ionosphere irregularities; ionospheric azimuth effect; ionospheric phase screens; semifocusing processing; synthetic aperture generate shift; turbulent ionosphere; Apertures; Azimuth; Coherence; Estimation; Focusing; Ionosphere; Synthetic aperture radar; InSAR; SAR ionospheric effects; ionosphere estimation; ionosphere scintillation;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International

Conference_Location

Quebec City, QC

Type

conf

DOI

10.1109/IGARSS.2014.6946344

Filename

6946344