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On a Dual PRI Pulse Sequence Mode for High-Resolution Wide-Swath SAR Imaging

Queiroz de Almeida, Felipe and Younis, Marwan and Krieger, Gerhard and Moreira, Alberto (2021) On a Dual PRI Pulse Sequence Mode for High-Resolution Wide-Swath SAR Imaging. In: International Geoscience and Remote Sensing Symposium (IGARSS). IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2021-07-12 - 2021-07-16, Brussels, Belgium. doi: 10.1109/IGARSS47720.2021.9554666.

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High-resolution and wide swath are known to be inherently incompatible requirements for spaceborne synthetic aperture radar (SAR) imaging systems. Extensive research shows that advanced instrument modes and architectures employing multiple receive channels in elevation and/or azimuth represent a feasible solution for this conflict. Currently, high SAR performance alternatives include ScanSAR systems with multiple channels in azimuth and Staggered-SAR systems with Scan-on-Receive (SCORE). The first are subject to Doppler spectral gaps and the undesirable scalloping effect. Staggered-SAR shows the considerable advantage of a complete Doppler spectrum, but at the cost of non-uniform sampling. This drives up the sampling rate and as a consequence the complexity, as on-board processing becomes necessary for data-rate reduction. This paper discusses a method to achieve high-resolution imaging using complementary coverage of a wide swath with two (interleaved) constant-PRI sequences, thus without incurring Doppler spectral gaps but also without paying the system-complexity penalty of irregular sampling.

Item URL in elib:https://elib.dlr.de/141470/
Document Type:Conference or Workshop Item (Speech)
Title:On a Dual PRI Pulse Sequence Mode for High-Resolution Wide-Swath SAR Imaging
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Queiroz de Almeida, FelipeUNSPECIFIEDhttps://orcid.org/0000-0001-5929-6633UNSPECIFIED
Younis, MarwanUNSPECIFIEDhttps://orcid.org/0000-0002-8563-7371UNSPECIFIED
Krieger, GerhardUNSPECIFIEDhttps://orcid.org/0000-0002-4548-0285UNSPECIFIED
Moreira, AlbertoUNSPECIFIEDhttps://orcid.org/0000-0002-3436-9653UNSPECIFIED
Date:July 2021
Journal or Publication Title:International Geoscience and Remote Sensing Symposium (IGARSS)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Spaceborne Radar, SAR, High-Resolution Wide-Swath, Digital Beamforming
Event Title:IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Brussels, Belgium
Event Type:international Conference
Event Dates:2021-07-12 - 2021-07-16
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben Tandem-L Vorstudien (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Queiroz de Almeida, Felipe
Deposited On:23 Mar 2021 12:34
Last Modified:24 Jul 2023 12:03

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