elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

ASCAT Surface State Flag (SSF): Extracting information on surface freeze/thaw conditions from backscatter data using an empirical threshold-analysis algorithm

Naeimi, Vahid und Paulik, Christoph und Bartsch, Annett und Wagner, Wolfgang und Park, San-Eun und Elger, Kirsten und Boike, Julia (2012) ASCAT Surface State Flag (SSF): Extracting information on surface freeze/thaw conditions from backscatter data using an empirical threshold-analysis algorithm. IEEE Transactions on Geoscience and Remote Sensing, 50 (7), Seiten 2566-2582. IEEE. DOI: 10.1109/TGRS.2011.2177667.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Offizielle URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6133332

Kurzfassung

Information on soil surface state is valuable for many applications such as climate studies and monitoring of permafrost regions. C-band scatterometer data indicate good potential to deliver information on surface freeze/thaw. Variation in state or amount of water contained in the soil causes significant alteration of dielectric properties of the soil which is markedly observable in scatterometer backscattered signal. A threshold-analysis method is developed to derive a set of parameters to be used in evaluating the normalized backscatter measurements through decision trees and anomaly detectionmodules for determination of freeze/thaw conditions. The model parameters are extracted from two years (2007–2008) backscatter data from ASCAT scatterometer onboard Metop satellite collocated with ECMWF ReAnalysis (ERA-Interim) soil temperature. Backscatter measurements are flagged as indicator of frozen/unfrozen surface, and snowmelt or existing water on the surface. The output product, so-called surface state flag (SSF), compares well with two modeled soil temperature data sets as well as the air temperature measurements from synoptic meteorological stations across the northern hemisphere. The SSF time series are also validated with soil temperature data available at four in situ observation sites in Siberian and Alaska regions showing the overall accuracy of about 80% to 90%.

Dokumentart:Zeitschriftenbeitrag
Titel:ASCAT Surface State Flag (SSF): Extracting information on surface freeze/thaw conditions from backscatter data using an empirical threshold-analysis algorithm
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Naeimi, Vahidvahid.naeimi@dlr.de
Paulik, Christophcpa@ipf.tuwien.ac.at
Bartsch, Annettab@ipf.tuwien.ac.at
Wagner, Wolfgangww@ipf.tuwien.ac.at
Park, San-Euns.park@wave.ie.niigata-u.ac.jp
Elger, Kirstenkirsten.elger@awi.de
Boike, Juliajboike@awi-potsdam.de
Datum:Januar 2012
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:50
DOI :10.1109/TGRS.2011.2177667
Seitenbereich:Seiten 2566-2582
Verlag:IEEE
Status:veröffentlicht
Stichwörter:Advanced scatterometer (ASCAT), freeze/thaw, scatterometer
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 - Vorhaben Fernerkundung der Landoberfläche
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Deutsches Fernerkundungsdatenzentrum > Landoberfläche
Hinterlegt von: Dr.techn. Vahid Naeimi
Hinterlegt am:06 Nov 2012 11:24
Letzte Änderung:19 Apr 2013 14:06

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.