Montzka SMOS Validation IGARSS 2011.ppt

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Carsten Montzka1, Heye Bogena1, Lutz Weihermueller1, Francois Jonard1, Marin Dimitrov1, Catherine Bouzinac2, Juha Kainulainen3, Jan E. Balling4, Jan Vanderborght1 and Harry Vereecken1

(1)Research Centre Jülich, Agrosphere Institute (ICG 4), Leo-Brandt-Strasse, 52425 Jülich, GERMANY(2)European Space Agency, ESTEC, Noordwijk, THE NETHERLANDS(3)Helsinki University of Technology, Department of Radio Science and Engineering, Espoo, FINLAND(4)Technical University of Denmark, DTU Space, Microwaves and Remote Sensing, DENMARK

Radiobrightness validation on different spatial scales during the SMOS Validation Campaign 2010 in the Rur catchment, Germany

26 November 2010 Agrosphere Institute (IBG 3) Slide 2


TERENO test sites

Agricultural test site

„Selhausen“

Forest test site

“Wüstebach”

Grassland test site

„Rollesbroich“


MEASUREMENTS


Instrumentation of the test site Wüstebach


Campaigns

Date DoY SMOS HUT-2D/EMIRAD JÜLBARA

11.5.2010 131 7:11 6:28-6:33 5:09-8:21

14.5.2010 134 6:54 6:31-8:06 5:09-7:42

22.6.2010 173 6:36 6:57-8:38 5:16-7:55

24.6.2010 175 6:58 6:30-8:15 5:10-7:31

27.6.2010 178 6:42 6:40-8:17 -


Mobile ground-based L-band radiometer

JÜLBARA


Airborne measurements with the Short Skyvan of Aalto University Helsinki


EMIRAD Radiometer

Technical University of

Denmark


HUT-2D Radiometer

Aalto University Helsinki


Airborne Radiometer data


RADIATIVE TRANSFER PARAMETER ESTIMATION


Modelled soil moisture

Modelled brightness temperature

Radiative transfer via modified L-MEB model

L-MEB input:

• Vegetation optical depth

• Surface roughness

• Soil surface temperature

• Canopy temperature

• …


Modelled soil moisture

Modelled brightness temperature

Airborne brightness temperature

Radiative transfer via modified L-MEB model


Data assimilation frameworkSequential Importance Resampling Particle Filter

Tb measurements

Calibrated top soil moisture/temperaturemodel results

L-M

EB 1000 L-MEB realizations (particles) with perturbed

vegetation opacity and soil surface roughness


More information on the data assimilation approach…


REFERENCE VALIDATION


Soil Moisture Reference Validation


Tb reference time series


SM (top) and Tbmean (bottom) reference


Radiative transfer parameter evolution


SMOS Validation

RMSE [K] over the campaign period


SMOS Validation


Outlook: SMAP Validation and A/P Fusion Analysis

• Polarimetric L-band Multibeam Radiometer (PLMR2)

• Frequency band:1401 – 1425 MHz

• Polarisation: Dual linear (V and H)

• Incidence angles: +/- 8°, +/-22°, +/- 38° @ pushbroom

• Synthetic Aperture Radar (SAR) system onboard a DLR Dornier DO 228 aircraft

• The sensor is able to operate in 4 frequency bands (X, C, L and P)

• single (E-SAR) and dual (F-SAR) channel operation

PLMR/PLMR2 DLR E-/F-SAR

26 November 2010 Agrosphere Institute (IBG 3) Slide 26EMIRAD PLMR HUT-2D E-SAR

Thanks for your attention!