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GMES Sentinel-1 Interferometric Wide Swath Mode Implementation Study: TOPS Doppler Spectrum Analysis and Antenna Mis-Pointing

Rodriguez-Cassola, Marc and Wollstadt, Steffen and Prats, Pau (2013) GMES Sentinel-1 Interferometric Wide Swath Mode Implementation Study: TOPS Doppler Spectrum Analysis and Antenna Mis-Pointing. Project Report. IWSM-DLR-TN-0002, 42 S.

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Abstract

This technical note evaluate Doppler-related focussing effects in the TOPS mode, which analyses the influence of the Doppler centroid during the focussing of SAR data. As it will be shown, certain degradation in terms of phase errors and impulse response shifts can appear in scenes with strong topography variations. Besides the numerical evaluation, also a compensation approach is presented, and the results are validated using experimental interferometric TOPS data acquired by TerraSAR-X. A further topic addressed in the TN is the mis-pointing estimation with TOPS data and the estimation of the 2-way antenna pattern. The former needs to consider the special characteristics of the TOPS signal by using a deramping function, whose sensitivity analysis is also shown. The 2-way antenna pattern estimation is a viable option to avoid using ground-receivers, but some aspects need to be considered in order to achieve the required measurement performance. Both approaches are analysed and validated using TerraSAR-X TOPS data takes over the Amazon rainforest.

Item URL in elib:https://elib.dlr.de/83584/
Document Type:Monograph (Project Report)
Title:GMES Sentinel-1 Interferometric Wide Swath Mode Implementation Study: TOPS Doppler Spectrum Analysis and Antenna Mis-Pointing
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rodriguez-Cassola, MarcUNSPECIFIEDUNSPECIFIED
Wollstadt, SteffenUNSPECIFIEDUNSPECIFIED
Prats, PauUNSPECIFIEDUNSPECIFIED
Date:4 July 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:42
Status:Published
Keywords:TOPS processing, Doppler, stop-and-go, antenna pattern
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Flugzeug-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute > SAR Technology
Deposited By: Prats, Dr. Pau
Deposited On:02 Aug 2013 13:44
Last Modified:02 Aug 2013 13:44

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