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Evaluation of the Internal Calibration Methodologies for Spaceborne Synthetic Aperture Radars with Active Phased Array Antennas

Makhoul, Eduardo and Broquetas, Antoni and López-Dekker, Paco and Closa, Josep and Saameno, Paula (2012) Evaluation of the Internal Calibration Methodologies for Spaceborne Synthetic Aperture Radars with Active Phased Array Antennas. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 5 (3), pp. 909-918. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/JSTARS.2012.2199087. ISSN 1939-1404.

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Abstract

This paper presents a novel approach in the instrumental error analysis of Synthetic Aperture Radars (SAR) based on active phased array antennas (APAA). A residual post-calibration error exists due to differences between the calibration and operational excitations of the transmit/receive modules (TRMs) for those source errors that are monitored by the internal calibration facility. Analytical expressions are derived for the residual post-calibration errors and validated through intensive simulations of some instrumental errors for a specific sensor architecture. Alternative internal global calibration strategies are proposed to reduce the impact of the post-calibration error. The simulations show that the proposed elevation dependent calibration can provide a substantial reduction of the post-calibration errors even in the case of relaxed tolerance of the TRM weight setting errors.

Item URL in elib:https://elib.dlr.de/76245/
Document Type:Article
Title:Evaluation of the Internal Calibration Methodologies for Spaceborne Synthetic Aperture Radars with Active Phased Array Antennas
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Makhoul, EduardoUniversitat Politècnica de CatalunyaUNSPECIFIED
Broquetas, AntoniUniversitat Politècnica de CatalunyaUNSPECIFIED
López-Dekker, PacoUNSPECIFIEDUNSPECIFIED
Closa, JosepEADS-CASA EspacioUNSPECIFIED
Saameno, PaulaEADS-CASA EspacioUNSPECIFIED
Date:1 June 2012
Journal or Publication Title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:5
DOI :10.1109/JSTARS.2012.2199087
Page Range:pp. 909-918
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:1939-1404
Status:Published
Keywords:Arrays , Calibration , Gain , Phased arrays , Radar antennas , Spaceborne radar, Synthetic aperture radar (SAR) , active phased array antenna (APAA) , internal calibration , transmit/receive modules (TRMs)
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 - SAR Expert Support Lab
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Lopez Dekker, Paco
Deposited On:09 Jul 2012 09:46
Last Modified:24 Nov 2020 04:12

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