Brightness temperature and soil moisture validation at different scales during the SMOS validation campaign in the Rur and Erft catchments, Germany

Montzka, C.; Bogena, H. R.; Weihermüller, L.; Jonard, François; Bouzinac, C.; Kainulainen, J.; Balling, J. E.; Loew, A.; Dall'Amico, J. T.; Rouhe, E.; Vanderborght, J.; Vereecken, H.

doi:10.1109/TGRS.2012.2206031

Article (Scientific journals)

Brightness temperature and soil moisture validation at different scales during the SMOS validation campaign in the Rur and Erft catchments, Germany

Montzka, C.; Bogena, H. R.; Weihermüller, L. et al.

2013 • In IEEE Transactions on Geoscience and Remote Sensing, 51 (3), p. 1728-1743

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10.1109/TGRS.2012.2206031

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Keywords :

Brightness temperature; L-band radiometry; Soil Moisture and Ocean Salinity (SMOS) validation; Area-wide; Belgium; Biosphere models; Brightness temperatures; Data assimilation; Different scale; European Space Agency; Ground based; L-band radiometer; Measurement sites; Measurements of; Microwave emissions; Mobile measurements; Netherlands; Radiative transfer calculations; Reference data; Soil Moisture and Ocean Salinity (SMOS); Soil temperature; Space-borne; Top soils; Transfer parameters; Catchments; Data processing; Radiative transfer; Radiometers; Runoff; Salinity measurement; Soil moisture; Temperature; SMOS; Germany

Abstract :

[en] The European Space Agency's Soil Moisture and Ocean Salinity (SMOS) satellite was launched in November 2009 and delivers now brightness temperature and soil moisture products over terrestrial areas on a regular three-day basis. In 2010, several airborne campaigns were conducted to validate the SMOS products with microwave emission radiometers at L-band (1.4 GHz). In this paper, we present results from measurements performed in the Rur and Erft catchments in May and June 2010. The measurement sites were situated in the very west of Germany close to the borders to Belgium and The Netherlands. We developed an approach to validate spatial and temporal SMOS brightness temperature products. An area-wide brightness temperature reference was generated by using an area-wide modeling of top soil moisture and soil temperature with the WaSiM-ETH model and radiative transfer calculation based on the L-band Microwave Emission of the Biosphere model. Measurements of the airborne L-band sensors EMIRAD and HUT-2D on-board a Skyvan aircraft as well as ground-based mobile measurements performed with the truck mounted JÜLBARA L-band radiometer were analyzed for calibration of the simulated brightness temperature reference. Radiative transfer parameters were estimated by a data assimilation approach. By this versatile reference data set, it is possible to validate the spaceborne brightness temperature and soil moisture data obtained from SMOS. However, comparisons with SMOS observations for the campaign period indicate severe differences between simulated and observed SMOS data. Copyright © 1980-2012 IEEE.

Disciplines :

Environmental sciences & ecology
Earth sciences & physical geography

Author, co-author :

Montzka, C.; Institute of Bio- and Geosciences: Agrosphere (IBG 3), Forschungszentrum Jülich, 52425 Jülich, Germany

Bogena, H. R.; Institute of Bio- and Geosciences: Agrosphere (IBG 3), Forschungszentrum Jülich, 52425 Jülich, Germany

Weihermüller, L.; Institute of Bio- and Geosciences: Agrosphere (IBG 3), Forschungszentrum Jülich, 52425 Jülich, Germany

Jonard, François ; Université de Liège - ULiège > Département de géographie > Systèmes d'information géographiques

Bouzinac, C.; ESTEC, European Space Agency, 2200 Noordwijk, Netherlands

Kainulainen, J.; Department of Radio Science and Engineering, School of Electrical Engineering, Aalto University, 00076 Espoo, Finland

Balling, J. E.; Microwaves and Remote Sensing, DTU Space, Technical University of Denmark, 2800 Kongens Lyngby, Denmark

Loew, A.; Max-Planck-Institute for Meteorology, KlimaCampus, 20146 Hamburg, Germany

Dall'Amico, J. T.; Department of Geography, University of Munich, 80333 Munich, Germany

Rouhe, E.; Department of Radio Science and Engineering, School of Electrical Engineering, Aalto University, 00076 Espoo, Finland

Vanderborght, J.; Institute of Bio- and Geosciences: Agrosphere (IBG 3), Forschungszentrum Jülich, 52425 Jülich, Germany

Vereecken, H.; Institute of Bio- and Geosciences: Agrosphere (IBG 3), Forschungszentrum Jülich, 52425 Jülich, Germany

Language :

English

Title :

Brightness temperature and soil moisture validation at different scales during the SMOS validation campaign in the Rur and Erft catchments, Germany

Publication date :

2013

Journal title :

IEEE Transactions on Geoscience and Remote Sensing

ISSN :

0196-2892

eISSN :

1558-0644

Publisher :

Institute of Electrical and Electronics Engineers, United States

Volume :

Issue :

Pages :

1728-1743

Peer reviewed :

Peer Reviewed verified by ORBi

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