Villano, Michelangelo und Nogueira Peixoto, Maxwell (2021) Characterization of Nadir Echoes in Multiple Elevation-Beam SAR with Constant and Variable Pulse Repetition Interval. IEEE Transactions on Geoscience and Remote Sensing. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2021.3103266. ISSN 0196-2892.
![]() |
PDF
- Postprintversion (akzeptierte Manuskriptversion)
4MB |
Offizielle URL: https://ieeexplore.ieee.org/document/9515360
Kurzfassung
Multiple-elevation-beam synthetic aperture radar (SAR) is a concept based on digital beamforming (DBF) in elevation and simultaneous recording of the echoes of multiple transmitted pulses. It enables high-resolution imaging of wide areas and is therefore ideal for the systematic observation of dynamic processes on the Earth’s surface. Furthermore, if the pulse repetition interval (PRI) is continuously varied (staggered SAR), it is possible to map a wide continuous swath rather than multiple subswaths separated by “blind” ranges. Within the design of multiple-elevation-beam SAR, however, it is fundamental to consider how nadir echoes affect the mapping capabilities of systems with constant PRI and the image quality of staggered SAR systems, where nadir echoes are intrinsically smeared due to the PRI variation. This paper addresses the characterization of nadir echoes in multiple-elevation-beam SAR with constant and variable PRI by presenting a parametric model for the nadir echo profile based on real radar measurements, a formulation of the nadir echo location and smearing in staggered SAR, and realistic simulations based on TerraSAR-X data, which show that nadir echo are likely to be barely visible in staggered SAR images. The results of this work are relevant to both the design of future SAR systems and the interpretation of the acquired data.
elib-URL des Eintrags: | https://elib.dlr.de/143415/ | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dokumentart: | Zeitschriftenbeitrag | ||||||||||||
Titel: | Characterization of Nadir Echoes in Multiple Elevation-Beam SAR with Constant and Variable Pulse Repetition Interval | ||||||||||||
Autoren: |
| ||||||||||||
Datum: | 17 August 2021 | ||||||||||||
Erschienen in: | IEEE Transactions on Geoscience and Remote Sensing | ||||||||||||
Referierte Publikation: | Ja | ||||||||||||
Open Access: | Ja | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Ja | ||||||||||||
In ISI Web of Science: | Ja | ||||||||||||
DOI: | 10.1109/TGRS.2021.3103266 | ||||||||||||
Verlag: | IEEE - Institute of Electrical and Electronics Engineers | ||||||||||||
ISSN: | 0196-2892 | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | Digital beamforming, high-resolution wide-swath (HRWS) imaging, multiple-elevation-beam SAR, nadir echo, NASA-ISRO SAR (NISAR), staggered SAR, synthetic aperture radar (SAR), Tandem-L. | ||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||
HGF - Programmthema: | Erdbeobachtung | ||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||
DLR - Forschungsgebiet: | R EO - Erdbeobachtung | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - SAR-Missionen | ||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||
Institute & Einrichtungen: | Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte | ||||||||||||
Hinterlegt von: | Villano, Dr.-Ing. Michelangelo | ||||||||||||
Hinterlegt am: | 05 Aug 2021 13:50 | ||||||||||||
Letzte Änderung: | 18 Feb 2022 11:30 |
Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags