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Multichannel Azimuth Processing in ScanSAR and TOPS Mode Operation

Gebert, Nicolas und Krieger, Gerhard und Moreira, Alberto (2010) Multichannel Azimuth Processing in ScanSAR and TOPS Mode Operation. IEEE Transactions on Geoscience and Remote Sensing, 48 (7), Seiten 2994-3008. DOI: 10.1109/TGRS.2010.2041356. ISSN 0196-2892.

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Offizielle URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5438817

Kurzfassung

Due to a system-inherent limitation, conventional synthetic aperture radar (SAR) is incapable of imaging a wide swath with high geometric resolution. This restriction can be overcome by systems with multiple receive channels in combination with an additional digital signal processing network. So far, the application of such digital beamforming algorithms for highresolution wide-swath SAR imaging has been restricted to multichannel systems in stripmap operation. However, in stripmap mode, the overall azimuth antenna length restricts the achievable swath width, thus preventing very wide swaths as requested by future SAR missions. Consequently, new concepts for ultrawideswath imaging are needed. A promising candidate is a SAR system with multiple azimuth channels being operated in burst mode. This paper analyzes innovative ScanSAR and Terrain Observation by Progressive Scans (TOPS) system concepts with regard to multichannel azimuth processing. For this, the theoretical analyses, performance figures, and SAR signal processing, which ad previously been derived for multichannel stripmap mode, are extended to systems operating in burst modes. The investigations reveal that multichannel ScanSAR systems enable the imaging of ultrawide swaths with high azimuth resolution and compact antenna lengths. These considerations are embedded in a multichannel ScanSAR system design example to demonstrate its capability to image an ultrawide swath of 400 km with a high geometric resolution of 5 m. In a next step, this system is adapted to TOPS mode operation, including an innovative �staircase� multichannel processing approach optimized for TOPS.

Dokumentart:Zeitschriftenbeitrag
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Titel:Multichannel Azimuth Processing in ScanSAR and TOPS Mode Operation
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Gebert, NicolasNICHT SPEZIFIZIERT
Krieger, GerhardNICHT SPEZIFIZIERT
Moreira, AlbertoNICHT SPEZIFIZIERT
Datum:Juli 2010
Erschienen in:IEEE Transactions on Geoscience and Remote Sensing
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:48
DOI :10.1109/TGRS.2010.2041356
Seitenbereich:Seiten 2994-3008
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der Herausgeber
IEEE, NICHT SPEZIFIZIERT
ISSN:0196-2892
Status:veröffentlicht
Stichwörter:Multi-channel azimuth processing, high-resolution ultra-wide-swath SAR imaging, multi-channel burst-mode operation, ScanSAR, TOPS, digital beamforming on receive
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Entwicklung eines Mini-SAR (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte
Institut für Hochfrequenztechnik und Radarsysteme
Hinterlegt von: Dr.-Ing. Gerhard Krieger
Hinterlegt am:10 Jan 2011 19:22
Letzte Änderung:12 Dez 2013 21:12

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