Legend: 10-day composite SMOS Level 3 products at 0.5°x0.5° resolution from may 2010 to June 2012 generated by the CATDS/CECOS research center.
The V02 version of the SMOS L3 salinity research products from the CATDS/CEC Expertise center are now available.
It includes :
- the reprocessed data from May 2010 to June 2012.
The temporal windows we used to generate the products are:
Compared to the previous version V01, the new version includes daily composite at 0.5° resolution without the previous + or - 5 days running window average. These new products are the daily composite from Ascending & Descending passes for the considered day.
In addition, each product now contain also:
-An estimate for the strong Radio Frequency Intereference (RFI) contamination probability is also included at the SSS retrieved pixel and for the level 3 SSS space-time window.
-Residual temporal drifts (at seasonal time scales) and land contamination signals are still found in the up-to-date SMOS brightness temperature level 1 products. These are mostly due to yet unsolved calibration (thermal) & image reconstruction issues (solar effects in L-band imaging, antena patterns uncertainties). These impact
-a new empirial correction for the galactic glint contamination has been implemented from a Geometric Optic model which shall improve the quality of SSS retrievals in Sep-oct months for descending passes and in March-April months for Ascending passes.
-a filter at the Brightness temperature Level has been applied to remove Tb data reconstructed in the proximity of the aliased sun-disk, in order to best mitigate solar contamination effects.
-Radio Frequency Intereferences are still a big issue for SMOS SSS retrieval quality. In order to tentatively best minimize the impact of RFI in our level 3 products, a weighting average of the swath retrieved SSS based on the RFI probability at the considered pixels & time window has been applied. This probability being now incorporated in the products, the user can now chose by him or herself only those pixels with 0 probability of (detected) RFI. Pixels with RFI probability higher than 80% over the considered space-time window have been removed.
Note that V02 data were not generated before May 2010 because of the reduced quality of the datasets during the initial period of the satellite commisioning phase. User still interested in that period can use our previous V01 data.
These data are freely available but as we would like to know who is using them, to get access we just ask you to send your email & institution to email@example.com
Then the ftp access will be provided to you.