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An Internal Calibration Approach of Multi-Channel SAR Sensors

Younis, Marwan and Adamiuk, Grzegorz and Almeida, Felipe and Huber, Sigurd and Jäger, Marc and Loinger, Andrea and Martone, Michele and Rommel, Tobias and Krieger, Gerhard (2017) An Internal Calibration Approach of Multi-Channel SAR Sensors. ESA Advanced RF Sensors and Remote Sensing Instruments (ARSI), 2017-09-12 - 2017-09-14, Noordwijk, The Netherlands.

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Official URL: http://esaconferencebureau.com/2017-events/17m18/

Abstract

Calibration methods of state-of-the-art spaceborne SAR are reviewed to suggest calibration strategies for future SAR systems. These systems will utilize digital beamforming, which poses new challenges for the calibration, as the increased complexity of multi-channel SAR does not allow for the extrapolation of current calibration techniques. Further, real-time error measurement and correction is unavoidable, which requires reconsidering current calibration approaches. One the other hand, the digital hardware already present in multi-channel SAR systems, offer opportunities for the calibration such as on-board error correction and digital calibration. This paper presents a calibration scheme suitable for multi-channel digital beam-forming SAR. The main characteristics of the suggested calibration concept is, that, it avoids the typical interruption of SAR operation when injecting the calibration signal --which would cause lost imaging pulses or a reduction in swath--, and that it allows for on-board channel correction. Internal calibration concepts do not measure errors outside the calibration signal path, such as the antenna, which thus cannot be corrected. These deficiencies are overcome by using a data driven calibration, meaning that the channel errors are extracted from the (raw) receive SAR data.

Item URL in elib:https://elib.dlr.de/113604/
Document Type:Conference or Workshop Item (Speech)
Title:An Internal Calibration Approach of Multi-Channel SAR Sensors
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Younis, MarwanUNSPECIFIEDhttps://orcid.org/0000-0002-8563-7371
Adamiuk, GrzegorzUNSPECIFIEDUNSPECIFIED
Almeida, FelipeUNSPECIFIEDUNSPECIFIED
Huber, SigurdUNSPECIFIEDhttps://orcid.org/0000-0001-7097-5127
Jäger, MarcUNSPECIFIEDUNSPECIFIED
Loinger, AndreaAirbus DSUNSPECIFIED
Martone, MicheleUNSPECIFIEDhttps://orcid.org/0000-0002-4601-6599
Rommel, TobiasUNSPECIFIEDhttps://orcid.org/0000-0003-1864-7585
Krieger, GerhardUNSPECIFIEDhttps://orcid.org/0000-0002-4548-0285
Date:12 September 2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:SAR Calibration, DBF Instrument Calibration
Event Title:ESA Advanced RF Sensors and Remote Sensing Instruments (ARSI)
Event Location:Noordwijk, The Netherlands
Event Type:international Conference
Event Dates:2017-09-12 - 2017-09-14
Organizer:ESA
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 - Development of a mini-SAR
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Younis, Dr.-Ing. Marwan
Deposited On:08 Aug 2017 13:47
Last Modified:31 Jul 2019 20:11

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