Mobile version

Operational News

Operational news about Ssalto and Duacs processing system.

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 “off_nadir_angle_wf” 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 “off_nadir_angle_wf” 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]


12.04.2019 [Jason-3] Jason-3 is back

This Morning, on a pass at 07:00UTC(i.e. on cycle 116, pass 246) all JASON-3 core mission instruments were restarted :

 

-POSEIDON at 07:16:24UTC

-AMR at 07:18:12UTC

-GPSPB at 07:20:01UTC

 

The first post-SHM mission telemetry has been delivered. First IGDRs will be Distributed on Monday April 15th.

 

 

[more]


09.04.2019 [Jason-3]The Jason-3 spacecraft entered safe mode on Saturday, April 6, 2019 at 23:17:22 UTC

The Jason-3 spacecraft entered safe mode on Saturday, April 6, 2019 at 23:17:22 UTC, immediately interrupting its measurements.

SEALEVEL j3 datasets in NRT are no longer updated with fresh data up to the recovery of the mission.

 

Investigation in progress on CNES side, the root cause has not yet been identified. [more]


27.03.2019 [SSALTO/DUACS] Jason-3 back in the NRT system as the reference mission

A few weeks ago, the Jason-3 acquisition was stopped due to a safe-hold mode (SHM) event. The event itself was processed swiftly by the operations teams, and the ongoing Cal/Val investigations now report nominal quality metrics and no significant impact beyond the short interruption itself.

 

Because Jason-3 is the so-called reference altimeter in the multi-mission system DUACS (CMEMS Sea-Level TAC), the temporary unavailability called for an emergency procedure in the NRT system. The procedure uses a temporary anchor altimeter (here: Sentinel-3A) to stabilize the NRT system until the reference altimeter is back in operations.

 

Because the anchor is not a reference altimeter, the system slowly drifts away from what would have been produced with the reference altimeter (particularly in NRT). Now that Jason-3 has collected enough measurements after the SHM event, the drift was estimated. As expected it is small thanks to the good quality of Sentinel-3A, but not zero.

 

The procedure to seamlessly (no offset) reduce the drift to zero and to switch back to Jason-3 as the reference altimeter will be executed over this week where the system will be in a nominal status (no bias in the system).

 

All efforts are made to make this transition invisible to the CMEMS & DUACS end-users.

 

Please feel free to report any suspicious finding you might have during this period.[more]


14.03.2019 Planned outage on Extraction service and TDS Saturday March 16th

Due to a planned outage, AVISO Extraction service and TDS (Opendap) are going to be unavailalble Saturday March 16th between 8h UTC and 15h UTC.[more]


13.03.2019 Wind/Wave gridded products production recovery

There were problems on the 3 satellites used to compute wind/wave maps : Jason-3 in Safe Hold Mode, Jason-2 also and Saral/AltiKa with strong problems.

All this leaded to a stop in the processing of those products. Since  March 11th, there are some maps which are produced but they only content OGDR data of Jason-3. As from March 12th, IGDR data of Jason-3 will be introduced.

Jason-2 and Saral have still some problems, so the date to reintroduce them it is not planned yet. [more]


07.03.2019 [Jason-3] Jason-3 instruments have been restarted successfully

Jason-3 instruments have been restarted successfully on Wednesday, March, 6th, in cycle 113, pass 62 :

POSEIDON at 08:40:40UTC AMR at 08:42:10UTC GPSPB at 08:43:20UTC.

 

The first telemetry from the satellite was available around 11UTC : OGDRs are now generated normally.[more]


05.03.2019 ebruary 2019: New version of L2P Non Time Critical Sentinel-3A products

The new version 02_01 is disseminated by AVISO+ via ftp or AVISO+ CNES Data Center (see the product sheet) with unchanged access (available in version_02_01 folder).

Note that the last cycle produced in version 02_00 has already been delivered (cycle 39). The next cycle 40 will be produced only in version 02_01.The version 01_00 will be removed from the ftp site. 

With this new version:

the input data are the “spring 2018 reprocessed” version of input NTC L2 products fully detailed in the EUMETSAT S3A STM reprocessing technical notethe retracking version is homogeneous for all the cyclesthe standards are the same as in 02_00 versionthe temporal coverage of L2P versions and L2 baseline used are:

  

S3A L2P NTC version 02_01S3A L2P NTC version 02_00S3A L2P NTC version 01_00temporal coverage15/06/2016 → present15/06/2016 → 02/01/201815/06/2016 → 02/01/2018based on L2 baseline collection003002 (till 17/11/2017) and 003 afterwards002

 You will find the details in the handbook [more]


28.02.2019 [SSALTO/Duacs] Impact of Jason-3 unavailability in the NRT system

The DUACS system is facing an important reduction of upstream altimeter measurements. [more]


Displaying results 11 to 20 out of 259
EnglishFrançaisEspañol
Rss feedsContactSitemapPartnersFAQGlossaryLexiconMobile
You must enable cookies in your browser preferences to save the modifications
You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

Customize the home page

View all widgets
Reduce display
Public profile
User profile

Select/Deselect widgets

Discover AVISO+

Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

Customizable homepage

The new home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Reading tools

Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

Products search guide

The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

AVISO+ Multimedia

The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!