Welcome to the End to End Simulator SEPSBIO : a tool which provide a complete simulation of the SMOS mission.

have a look at this Google Earth KMZ file showing a SMOS animation dedicated to soil moisture measurements.

How SMOS is working...

Click to enlarge...


The Soil Moisture and Ocean Salinity (SMOS) satellite is based upon a passive microwave sensor operating at L-band (1.4 GHz). It is due for launch next summer (2009).

The main science goals of the mission are to retrieve soil moisture and ocean salinity values from angular polarised brightness temperatures.

The level 2 to 4 science expertise centre is located at the Centre d'Etudes Spatiales de la BIOsphère (CESBIO) for all the soil moisture product developments either with Array Systems (CND) for ESA or with Cap Gémini and Atos for CNES.

The first 5 centimeter soil moisture values are to be derived from SMOS data with an expected accuracy better than 0.04 m3/m3 for low vegetation relatively uniform pixels, i.e., at a spatial resolution of 43 km, and a 3 day temporal sampling at the equator.

The SMOS End to End (E2E) simulator SEPSBIO provides a complete simulation of SMOS mission. From surface descriptions, brightness temperatures (TB) are simulated with the same radiative transfer as will be used at retrieval level. Then, TB measured by SMOS sensor are simulated, according to instrument characteristics and satellite position, from which soil moisture can be retrieved. The E2E are used to assess the SMOS performances and evaluate the retrieval algorithm tools

Download :

KMZ file

Google Earth


Contacts :

about SMOS mission : Yann Kerr
about SMOS simulations : François Cabot
about KML files : Claire Gruhier