Operational News

28.11.2019 CNES DATA center maintenance operation on December 3rd

Due to a maintenance operation next Tuesday December 3rd, the access to CNES DATA Center (aviso-data-center.cnes.fr) will be unavaible between 07h30 to 18h UTC[more]

08.11.2019 Upgrade of the Gridded Data Extraction Tool python Client

Please be informed that for security reasons, the https protocol will be upgraded (in version TLS1.2) on December 3rd with an impact on the Gridded Data Extraction Tool python client.  If you use the script option to download data from this tool, you are thus invited to download as soon as possible the last version of the script available (1.8.4)  on this link. After December 3rd, the former versions of the python client will no longer work. Thank you for your understanding[more]

07.11.2019 FTP protocol important information

We would like to inform users that the FTP protocol is no longer supported by most common browsers[more]

30.09.2019 [Jason-2] OSTM/Jason-2 mission to cease acquisition of scientific data

After more than 11 years in orbit, the Ocean Surface Topography Mission (OSTM) on Jason-2 will permanently cease acquisition of scientific data.[more]

12.06.2019 [Saral/Altika] Cycle 128 GDR release

GDR cycle 128 (11 March 2019-15 April 2019) was just released recently[more]

22.05.2019 [Jason-2] Jason-2 is back to work

All core mission instruments have been restarted today on the last available pass :

POSEIDON at 08:54:07UTC AMR at 08:56:06UTC GPSP at 08:59:15UTC

The first OGDRs will be available around 10:30UTC.

As a reminder, 2 maneuvers are still necessary to place Jason-2 correctly in order to resume the geodetic cycle #2, stopped on February 16th. According to the current plans, this should be achieved on Tuesday 28th of May.[more]

10.05.2019 [Saral/Altika] Cycle 127 GDR release

Dear SARAL/Altika users,

Please take note of the disclaimer below : 

GDR cycle 127 (04 February 2019-11 March 2019) was just released recently. During this cycle SARAL/AltiKa satellite regularly encountered mispointing events. The availability and the quality of data measurements continue to be degraded from time to time. CNES, EUMETSAT and ISRO inform users that removing any ocean data with âoff_nadir_angle_wfâ over 0.09 deg² will ensure a good data quality.

Detailled information about calval analysis is given in this page.

Quality assement report is available here.[more]

09.05.2019 Maintenance on the Aviso+ Web services on May 14th 2019 between 10h and 10h15 UTC

Due to a maintenace, the Aviso+ web sites will be disrupted on May 14th between 10h and 10h15 UTC. This will concern, the website, the Aviso+ extraction service, the TDS (Opendap), and the Live Access Server (LAS) [more]

26.04.2019 [Saral/Altika] Data quality : back to normal

Dear SARAL/Altika users, 

We are pleased to inform you that the quality of data is almost back to normal. Indeed, ISRO teams have improved the pointing stability thanks to new operational procedures.

Since April 19th 2019, the availability and the quality of data measurements are better (small time to time limited effects may anyway occur). Therefore, before using the data, Users are still invited to remove any ocean data with âoff_nadir_angle_wfâ over 0.09 deg²)[more]

18.04.2019 [Saral/AltiKa] Data information

Dear SARAL/Altika users,

 Please take note of the disclaimer below :

 SARAL/AltiKa satellite encounters since 3rd of February 2019 some issues affecting the nadir pointing accuracy. ISRO Operational Team in charge of the platform is doing many efforts to fix the issues and to recover a nominal mission as soon as possible.  

The availability and the quality of data measurements is degraded from time to time. Nevertheless, Cnes, EUMETSAT and ISRO have decided to continue the dissemination of the near real time and off-line products;  Therefore, before using the data, Users are invited to remove any ocean data with âoff_nadir_angle_wfâ over 0.09 deg²; otherwise standard quality flags may be used.

GDR cycle 126 (31 December 2018-04 February 2019 is just released today. It covers the beginning of the degraded period and you are encouraged to read the associated Cal/Val report available on AVISO+. In brief, during this cycle mispointing is quite larger than usual from pass 962 (03/02/2019 06:21:18 ) due to this attitude deviation. Hence a higher percentage of rejected measurements (up to  80%) is observed starting at pass 962. The attitude deviation also explains the higher percentage of missing measurements Users are advised not to use data with off_nadir_angle > 0.09deg².[more]