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 Last revision: 02/10/2006

Scientific projects

Current projects

the SMOS Programme (CESBIO, CNRM, ONERA)

Characterization Campaign of Reference Thermo-regulated Patterns

Previous

Previous projects

field measurement of bidirectional spectral reflectance in the 0.4 - 2.5 µm spectral domain (ONERA)

infrared radiometry in the 3-5 µm spectral band (ONERA, LSIIT)

project for analysing directional effects in the thermal infrared range (8-14µm) for heterogeneous scenes (ONERA, CESBIO)

fraction of PAR intercepted by a vegetal cover (CESBIO)

Participating laboratories: CESBIO, CNRM, ONERA.

Global purpose of the project: the SMOS mission (Soil Moisture and Ocean Salinity) is built on a mini-satellite equiped with a unique band L micro-wave radiometer (21 cm / 1.4 GHz). The objective of the mission consists in producing soil moisture and ocean salinity global maps during at least 3 years, with a spatial resolution of about 50 km.

Goal of the field measurement: validate the method for retrieving the temperature and humidity of a given soil using radiometric measurements in the L band.

Means: the validation is based on the use of a thermal and hydric transfer code whose input data are provided  by temperature and humidity sensors buried in soil devoid of vegetation and in fallow land from 0 to 1 metres in depth; these measurements are completed with meteorological measurements and measurements of solar radiation and net radiation. The data is acquired in a continuous session every 30 minutes.
A 1.4 GHz micro-wave radiometer developed and realised by ONERA/DEMR is designed to take continuous measurement over the two types of soil, chosen for the validation. The radiometer will shortly be installed on an orientable automatic bench at about 10 m above the ground. Further information on the radiometer - Contact: Francois.Lemaitre@onecert.fr

Pictures of installations

Data: available with restricted access; if you have login/pass, go through the Data page.

Links: Official SMOS site, SMOS instruments, SGP SMOS Current Conditions and Meteograms, Primary SMOS Summary Format

Contacts: fied measurements: Jean-Christophe.Calvet@meteo.fr, global SMOS project: Yann.Kerr@cesbio.cnes.fr, data: Patricia.Derosnay@cesbio.cnes.fr.