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Glacier Velocity Monitoring by Maximum Likelihood Texture Tracking

Erten, Esra und Reigber, Andreas und Prats, Pau und Hellwich, Olaf (2009) Glacier Velocity Monitoring by Maximum Likelihood Texture Tracking. IEEE Transactions on Geoscience and Remote Sensing, 47 (2), Seiten 394-405. DOI: 10.1109/TGRS.2008.2009932.

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Offizielle URL: http://ieeexplore.ieee.org.

Kurzfassung

The performance of a tracking algorithm considering remotely sensed data strongly depends on a correct statistical description of the data, i.e. its noise model. The objective of this paper is to introduce a new intensity tracking algorithm for SAR (synthetic aperture radar) data, considering its multiplicative speckle/noise model. The proposed tracking algorithm is discussed regarding the measurement of glacier velocities. Glacier monitoring exhibits complex spatial and temporal dynamics including snowfall, melting and ice flows at a variety of spatial and temporal scales. Due to these complex characteristics, most traditional methods based on SAR suffer from speckle decorrelation that results in a low signal-to-noise ratio (SNR). The proposed tracking technique improves the accuracy of the classical intensity tracking technique by making use of the temporal speckle structure. Even though a new intensity based matching algorithm is proposed especially for incoherent data sets, the analysis of the proposed technique was also performed for correlated data sets. As it is demonstrated, the velocity monitoring can be continuously performed by using the maximum likelihood texture tracking without any assumption concerning the correlation of the dataset. The maximum likelihood texture tracking approach was tested on ENVISAT-ASAR data, acquired during summer 2004 over the Inyltshik glacier in Kyrgyzstan, representing one of the largest alpine glaciers systems of the world. It will be demonstrated that the proposed technique is capable of robustly and precisely detecting the surface velocity field and velocity changes in time.

Dokumentart:Zeitschriftenbeitrag
Titel:Glacier Velocity Monitoring by Maximum Likelihood Texture Tracking
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Erten, Esraesra.erten@dlr.de
Reigber, Andreasandreas.reigber@dlr.de
Prats, Paupau.prats@dlr.de
Hellwich, Olafhellwich@fpk.tu-berlin.de
Datum:2 Februar 2009
Erschienen in:IEEE Transactions on Geoscience and Remote Sensing
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:47
DOI :10.1109/TGRS.2008.2009932
Seitenbereich:Seiten 394-405
Status:veröffentlicht
Stichwörter:Estimation theory, synthetic aperture radar (SAR), speckle, glacier-motion estimation, offset tracking, maximum likelihood estimation
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Flugzeug-SAR (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Hochfrequenztechnik und Radarsysteme > SAR-Technologie
Hinterlegt von: Esra Erten
Hinterlegt am:16 Sep 2009 14:32
Letzte Änderung:12 Dez 2013 20:42

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