1. www.argans.co.uk SMOS L2 Ocean Salinity – Reprocessing Level 2 Ocean Salinity Reprocessing 17 September 2008

2. www.argans.co.uk SMOS L2 Ocean Salinity – Reprocessing Reprocessing Activities TEC data Improved Galactic Map WEF computation Stokes 1 computation Errors in forward models Diurnal effect Standard atmosphere in Galactic Noise model Galactic Noise polarisation effects

3. www.argans.co.uk SMOS L2 Ocean Salinity – Reprocessing Retrieval Strategy New antenna grid Multi-step: temporal coherence Multi-pixel approach: spatial coherence Use of L1 norm a priori full covariance matrix for geophysical parameters

4. www.argans.co.uk SMOS L2 Ocean Salinity – Reprocessing Scene Dependent Bias Correction Causes – Instrumental inaccuracies in NIRs – Inherent difference between antenna temperature (average TB) & AF-FOV TB – Residual error from cancellation of sun contributions to antenna temperature Correct L1c TB’s by comparing average instantaneous & modelled TB’s in AF-FOV