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Measuring 3D Surface Motion with Future SAR Systems based on Reflector Antennae

Ansari, Homa and De Zan, Francesco and Parizzi, Alessandro and Eineder, Michael and Goel, Kanika and Adam, Nico (2016) Measuring 3D Surface Motion with Future SAR Systems based on Reflector Antennae. IEEE Geoscience and Remote Sensing Letters, 13 (2), pp. 272-276. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/LGRS.2015.2509440. ISSN 1545-598X.

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Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7374669&queryText=measuring%203d%20homa%20ansari&newsearch=true


A conventional SAR system can provide one-dimensional Line of Sight (LOS) motion measurements from repeat-pass observations. 2D motions may be measured by combining two observations from ascending and descending geometries. The third motion component may be retrieved by adding a third geometry and/or by integrating along-track measurements; although, with much reduced performance compared to the other two components. Several options exist to improve the accuracy of retrieving the third motion component; such as, combining left and right-looking observations or exploiting recently-proposed innovative SAR acquisition modes (BiDiSAR, SuperSAR). These options are however challenging for future SAR systems based on large reflector antennas, due to lack of capability to electronic beam steering or frequent toggle between left and right-looking mode. Therefore, in this letter we assess and compare the realistic acquisition scenarios for a reflector-based SAR in an attempt to optimize the achievable 3D performance. Investigating the squinted SAR geometry as one of the feasible scenarios, we show that squint of 13.5° will yield comparable performance to the left-looking acquisition, while further squinting outperforms this or other feasible configurations. As an optimum configuration for 3D retrieval, the squinted acquisition is further elaborated: the different acquisition plans considering a constellation of two satellites as well as the challenges for data processing are addressed.

Item URL in elib:https://elib.dlr.de/100358/
Document Type:Article
Title:Measuring 3D Surface Motion with Future SAR Systems based on Reflector Antennae
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ansari, Homahoma.ansari (at) dlr.deUNSPECIFIED
De Zan, FrancescoFrancesco.DeZan (at) dlr.deUNSPECIFIED
Parizzi, Alessandroalessandro.parizzi (at) dlr.deUNSPECIFIED
Goel, KanikaKanika.Goel (at) dlr.deUNSPECIFIED
Journal or Publication Title:IEEE Geoscience and Remote Sensing Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1109/LGRS.2015.2509440
Page Range:pp. 272-276
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Keywords:3D surface motion, Azimuth shifts, Error analysis, InSAR, SAR acquisition geometry, Squinted SAR
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:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Ansari, Homa
Deposited On:04 Dec 2015 08:57
Last Modified:31 Jul 2019 19:57

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