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A Multibaseline Pol-InSAR Inversion Scheme for Crop Parameter Estimation at Different Frequencies

Pichierri, Manuele and Hajnsek, Irena and Papathanassiou, Konstantinos (2016) A Multibaseline Pol-InSAR Inversion Scheme for Crop Parameter Estimation at Different Frequencies. IEEE Transactions on Geoscience and Remote Sensing, 54 (8), 4952 - 4970. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TGRS.2016.2553739 ISSN 0196-2892

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Official URL: http://ieeexplore.ieee.org/document/7466139/

Abstract

A novel oriented volume over ground (OVoG) inversion scheme is developed and tested on a data set of simulated agricultural scenarios and real SAR acquisitions. The algorithm makes use of multibaseline measurements to estimate the whole set of the OVoG structural parameters (e.g., crop height, differential extinction between eigenpolarizations, and ground-to-volume ratios) and is significantly robust against non-volumetric decorrelation contributions. The theoretical assessment points out that, in the dual-baseline case, the vegetation height hV can be estimated with a relative root-mean-square deviation (%RMSD) of 7.8% if the selected baselines fulfill the condition 1.2 <; κzhV <; 2.8 rad (κz is the vertical wavenumber). Furthermore, the variance of the estimates is inversely related to the number of baselines Nb. Compared with the dual-baseline case, the RMSD of the differential extinction is reduced by 45% (from 1.1 to 0.6 dB/m) when Nb = 5 baselines are employed, whereas its mean bias is independent of Nb. The proposed scheme has been assessed using a set of repeat-pass F-SAR acquisitions at L-, C-, and X-band of an agricultural area in Germany. Using two baselines, the height of maize and rape fields is estimated with an average 10% %RMSD if the inversion is carried out over L-band acquisitions. On the other hand, when X-band data are employed, one can obtain reliable estimates of wheat and barley height, with a %RMSD better than 24%. The study also indicates the existence of differential wave propagation effects through maize (Δσ = σVV - σHH between 0.7 and 1 dB/m) and rape (Δσ = -0.8 dB/m) canopies at L-band.

Item URL in elib:https://elib.dlr.de/107963/
Document Type:Article
Title:A Multibaseline Pol-InSAR Inversion Scheme for Crop Parameter Estimation at Different Frequencies
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pichierri, ManueleethUNSPECIFIED
Hajnsek, Irenadlr/hr, eth zurichUNSPECIFIED
Papathanassiou, Konstantinosdlr/hrUNSPECIFIED
Date:August 2016
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:54
DOI :10.1109/TGRS.2016.2553739
Page Range:4952 - 4970
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:Published
Keywords:polarimetric synthetic aperture radar interferometry (Pol-InSAR), Agriculture, multibaseline, multifrequency, oriented volume over ground (OVoG), parameter retrieval
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 Sicherheitsrelevante Erdbeobachtung
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Deposited By: Radzuweit, Sibylle
Deposited On:18 Nov 2016 11:46
Last Modified:31 Jul 2019 20:05

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