Concept and Performance of Internal Instrument Calibration for Multi-Channel SAR

Conference: EUSAR 2018 - 12th European Conference on Synthetic Aperture Radar
06/04/2018 - 06/07/2018 at Aachen, Germany

Proceedings: EUSAR 2018

Pages: 5Language: englishTyp: PDF

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Younis, Marwan; Laux, Christopher; Krieger, Gerhard (Microwaves and Radar Institute, German Aerospace Center (DLR), Germany)
Loinger, Andrea; Adamiuk, Grzegorz (Airbus Defense and Space GmbH, Space Systems, Germany)
Ludwig, Michael; Geudtner, Dirk (European Space Agency, ESA/ESTEC, The Netherlands)

The increased complexity of multi-channel SAR sensors and the real-time on-board phase/amplitude correction requirement poses new challenges for the calibration, which cannot rely on current calibration techniques. On the other hand, the digital hardware utilized in multi-channel SAR systems, offer entirely new opportunities for the calibration such as on-board error correction and digital calibration. An internal calibration strategy for future digital beamforming SAR instruments is detailed and its performance analyzed using a dedicated calibration simulator software.