The High-Resolution Digital-Beamforming Airborne SAR System DBFSAR
Synthetic Aperture Radar (SAR) is an established remote sensing technique that can robustly provide high-resolution imagery of the Earth’s surface. However, current space-borne SAR systems are limited, as a matter of principle, in achieving high azimuth resolution and a large swath width at the same...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/12/11/1710 |
| id |
doaj-8bd1a708c10a441a88891013a53eef9e |
|---|---|
| record_format |
Article |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Andreas Reigber Eric Schreiber Kurt Trappschuh Sebastian Pasch Gerhard Müller Daniel Kirchner Daniel Geßwein Stefan Schewe Anton Nottensteiner Markus Limbach Alicja Schreiber Tobias Rommel Ralf Horn Marc Jäger Rolf Scheiber Stefan V. Baumgartner Sushil Kumar Joshi André Barros Cardoso da Silva Alberto Moreira |
| spellingShingle |
Andreas Reigber Eric Schreiber Kurt Trappschuh Sebastian Pasch Gerhard Müller Daniel Kirchner Daniel Geßwein Stefan Schewe Anton Nottensteiner Markus Limbach Alicja Schreiber Tobias Rommel Ralf Horn Marc Jäger Rolf Scheiber Stefan V. Baumgartner Sushil Kumar Joshi André Barros Cardoso da Silva Alberto Moreira The High-Resolution Digital-Beamforming Airborne SAR System DBFSAR Remote Sensing SAR sensors digital beamforming calibration polarimetry interferometry |
| author_facet |
Andreas Reigber Eric Schreiber Kurt Trappschuh Sebastian Pasch Gerhard Müller Daniel Kirchner Daniel Geßwein Stefan Schewe Anton Nottensteiner Markus Limbach Alicja Schreiber Tobias Rommel Ralf Horn Marc Jäger Rolf Scheiber Stefan V. Baumgartner Sushil Kumar Joshi André Barros Cardoso da Silva Alberto Moreira |
| author_sort |
Andreas Reigber |
| title |
The High-Resolution Digital-Beamforming Airborne SAR System DBFSAR |
| title_short |
The High-Resolution Digital-Beamforming Airborne SAR System DBFSAR |
| title_full |
The High-Resolution Digital-Beamforming Airborne SAR System DBFSAR |
| title_fullStr |
The High-Resolution Digital-Beamforming Airborne SAR System DBFSAR |
| title_full_unstemmed |
The High-Resolution Digital-Beamforming Airborne SAR System DBFSAR |
| title_sort |
high-resolution digital-beamforming airborne sar system dbfsar |
| publisher |
MDPI AG |
| series |
Remote Sensing |
| issn |
2072-4292 |
| publishDate |
2020-05-01 |
| description |
Synthetic Aperture Radar (SAR) is an established remote sensing technique that can robustly provide high-resolution imagery of the Earth’s surface. However, current space-borne SAR systems are limited, as a matter of principle, in achieving high azimuth resolution and a large swath width at the same time. Digital beamforming (DBF) has been identified as a key technology for resolving this limitation and provides various other advantages, such as an improved signal-to-noise ratio (SNR) or the adaptive suppression of radio interference (RFI). Airborne SAR sensors with digital beamforming capabilities are essential tools to research and validate this important technology for later implementation on a satellite. Currently, the Microwaves and Radar Institute of the German Aerospace Center (DLR) is developing a new advanced high-resolution airborne SAR system with digital beamforming capabilities, the so-called DBFSAR, which is planned to supplement its operational F-SAR system in near future. It is operating at X-band and features 12 simultaneous receive and 4 sequential transmit channels with 1.8 GHz bandwidth each, flexible DBF antenna setups and is equipped with a high-precision navigation and positioning unit. This paper aims to present the DBFSAR sensor development, including its radar front-end, its digital back-end, the foreseen DBF antenna configuration and the intended calibration strategy. To analyse the status, performance, and calibration quality of the DBFSAR system, this paper also includes some first in-flight results in interferometric and multi-channel marine configurations. They demonstrate the excellent performance of the DBFSAR system during its first flight campaigns. |
| topic |
SAR sensors digital beamforming calibration polarimetry interferometry |
| url |
https://www.mdpi.com/2072-4292/12/11/1710 |
| work_keys_str_mv |
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doaj-8bd1a708c10a441a88891013a53eef9e2020-11-25T03:15:04ZengMDPI AGRemote Sensing2072-42922020-05-01121710171010.3390/rs12111710The High-Resolution Digital-Beamforming Airborne SAR System DBFSARAndreas Reigber0Eric Schreiber1Kurt Trappschuh2Sebastian Pasch3Gerhard Müller4Daniel Kirchner5Daniel Geßwein6Stefan Schewe7Anton Nottensteiner8Markus Limbach9Alicja Schreiber10Tobias Rommel11Ralf Horn12Marc Jäger13Rolf Scheiber14Stefan V. Baumgartner15Sushil Kumar Joshi16André Barros Cardoso da Silva17Alberto Moreira18Microwaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanyMicrowaves and Radar Institute, German Aerospace Center (DLR), Münchener Str. 20, D-82230 Oberpfaffenhofen, GermanySynthetic Aperture Radar (SAR) is an established remote sensing technique that can robustly provide high-resolution imagery of the Earth’s surface. However, current space-borne SAR systems are limited, as a matter of principle, in achieving high azimuth resolution and a large swath width at the same time. Digital beamforming (DBF) has been identified as a key technology for resolving this limitation and provides various other advantages, such as an improved signal-to-noise ratio (SNR) or the adaptive suppression of radio interference (RFI). Airborne SAR sensors with digital beamforming capabilities are essential tools to research and validate this important technology for later implementation on a satellite. Currently, the Microwaves and Radar Institute of the German Aerospace Center (DLR) is developing a new advanced high-resolution airborne SAR system with digital beamforming capabilities, the so-called DBFSAR, which is planned to supplement its operational F-SAR system in near future. It is operating at X-band and features 12 simultaneous receive and 4 sequential transmit channels with 1.8 GHz bandwidth each, flexible DBF antenna setups and is equipped with a high-precision navigation and positioning unit. This paper aims to present the DBFSAR sensor development, including its radar front-end, its digital back-end, the foreseen DBF antenna configuration and the intended calibration strategy. To analyse the status, performance, and calibration quality of the DBFSAR system, this paper also includes some first in-flight results in interferometric and multi-channel marine configurations. They demonstrate the excellent performance of the DBFSAR system during its first flight campaigns.https://www.mdpi.com/2072-4292/12/11/1710SARsensorsdigital beamformingcalibrationpolarimetryinterferometry |