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

Pichierri, Manuele und Hajnsek, Irena und 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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Offizielle URL: http://ieeexplore.ieee.org/document/7466139/

Kurzfassung

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.

elib-URL des Eintrags:https://elib.dlr.de/107963/
Dokumentart:Zeitschriftenbeitrag
Titel:A Multibaseline Pol-InSAR Inversion Scheme for Crop Parameter Estimation at Different Frequencies
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Pichierri, ManueleethNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hajnsek, Irenadlr/hr, eth zurichNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Papathanassiou, Konstantinosdlr/hrNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:August 2016
Erschienen in:IEEE Transactions on Geoscience and Remote Sensing
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:54
DOI:10.1109/TGRS.2016.2553739
Seitenbereich:4952 - 4970
Verlag:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0196-2892
Status:veröffentlicht
Stichwörter:polarimetric synthetic aperture radar interferometry (Pol-InSAR), Agriculture, multibaseline, multifrequency, oriented volume over ground (OVoG), parameter retrieval
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Sicherheitsrelevante Erdbeobachtung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > Radarkonzepte
Hinterlegt von: Radzuweit, Sibylle
Hinterlegt am:18 Nov 2016 11:46
Letzte Änderung:31 Jul 2019 20:05

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