News

After the recent public release of the Saral O/IGDR, this is a short synthesis of the SARAL IGDR-T products data quality assessment over oceans.

We are pleased to provide this short synthesis of the Saral IGDR-T products data quality assessment over oceans. CalVal analysis was performed on Cnes and CLS side during past months using classical tools like Cross-Overs and SLA analysis.
This memo provides early metrics computed on our side in order to ease the Saral use. This is based on the analysis of IGDR and OGDRs data dated from mid March 2013 to end of June. The Calval analysis will continue with the assessment of the first GDRs cycles and the routine monitoring of OGDRs and IGDRs products.

We also like to mention that a patch has been prepared to correct for some anomalies and to account for the in-flight calibration data in the ground processing. The evolutions included in this patch are described in the <link http: www.aviso.oceanobs.com fileadmin documents data products saral_igdr_t_release_note2013.pdf _blank external-link-new-window>pdf document. This patch has been installed on IGDRs products on July 11^th. It will be installed on OGDRs processing chains around July 17^th.

Regarding the IGDRs products, the first product generated with this patch is :
SRL_IPN/R/S_2PTP004_0395_20130710_235618_20130711_004636.Cnes.nc

This is mentioned in the Netcdf product in the global attribute ‘references’. This patch corresponds to the patch number 2 on the Level1B Scientific Library ; number 10 on the Level2 Scientific Library and number 9 on the Processing Pilot chain :
references = "L1 library=V3.1p1p2, L2 library=V4.2p1p6p9p10, Processing Pilot=V3-4-1p2p5p6p7p8p9" ;

Former values were:
references = "L1 library=V3.1p1, L2 library=V4.2p1p6p9, Processing Pilot=V3-4-1p2p5p6p7p8" ;

Amandine Guillot –Saral CalVal Responsible
Nicolas Picot - Saral Measurement System Engineer
On behalf of Cnes Saral project.