A maintenance activity on the core infrastructure hosting the data hub services involving the replacement of switches interconnecting the servers to the rolling archive storage is planned on 11 January from 08:00 to 16:00 UTC.

During this period the data hub services will continue to run, however, product publication will be delayed and users may experience a degradation in download and node inspection performances.

During the maintenance window the following Data Hub Services will be affected:

• Copernicus Open Access Hub (also including API Hub, S-3 Pre-ops Data Hub and GNSS Rinex Pre-ops Hub);
  
• Collaborative Data Hub - Node 1;
  
• Copernicus Services Data Hub.
  

We apologize for any inconvenience this might cause to your activities.

Collaborative users are informed that, due to performance issues detected during the Christmas Holidays, service maintenance activities are scheduled today 7 and tomorrow 8 January 2019.

The maintenance will affect the Collaborative Data Hub Service according to the following programme:

7 January 2019 - From 12:00 to 12:30 UTC
Collaborative Data Hub Node 1
During the maintenance window the access Node 1 will be unreachable.
Collaborative Data Hub Node 3
During this maintenance window, no downtime is foreseen on access Node 3. A temporary products publication delay might occur.

8 January 2019 - From 08:30 to 17:00 UTC UTC
Collaborative Data Hub Node 1
During the maintenance activity two service interruptions of about 30 minutes will occur at 08:30 and at 14:00 UTC. The publication of new products will be temporarily suspended during the whole maintenance period.

The Collaborative Data Hub - Node 2 will continue to be accessible to their registered users.

We apologize for any inconvenience this might cause to your activities.

Collaborative Data Hub users are informed that, due to some isolated cases of products download failure, an investigation activity on Collaborative Hub Node 2 will be performed until 20 December 2018.

During the investigation no downtime is foreseen and the publication of new products will be guaranteed.

With reference to the news published on 07 December, we are pleased to inform users of the successful dissemination of the Copernicus Sentinel-2 Level-2A products worldwide on the data hubs as of 13 December, starting from Sentinel-2B sensing orbit 9243 and Sentinel-2A sensing orbit 18152.

Due to the transition to Level-2A global distribution, the availability of Level-2A products on 12 December sensing over Europe was delayed and completed on 14 December.

Following successful completion of the Copernicus Sentinel-3B Commissioning Phase, the Level 1 (OL_1_EFR and OL_1_ERR) both Near-Real-Time (NRT) and Non-Time-Critical (NTC) production of the Ocean and Land Colour Instrument (OLCI) instrument will be published on the Collaborative Data Hub starting from 17 December 2018.

The Product Notices related to the current release are available to download:

* https://sentinel.esa.int/documents/247904/2702575/Sentinel-3-OLCI-Product-Notice-Level-1B

As previously announced in the news of 12 November 2018 (https://scihub.copernicus.eu/news/News00415) the obsolete Sentinel 3A SRAL NTC products L1 (SR_1_SRA) and L2 (SR_2_LAN) overlapping in sensing the reprocessed ones just published, will be deleted starting from 12 December 2018.

Copernicus Sentinel-1A was unavailable from 9 December 2018 18:53 UTC to 10 December 2018 08:57 UTC, due to a SAR anomaly.

No data were generated during this period.

Following the transition of Copernicus Sentinel-3B into operations after a successful Commissioning Phase, the L1B and L2 Near-Real-Time (NRT) and L1B, L1A, L1BS and L2 Non-Time-Critical (NTC) and Short-Time-Critical (STC) production of the SAR Radar Altimeter (SRAL) instrument will be published on the Collaborative Data Hub starting from the 11th of December 2018.

The Product Notices related to the current release are available to download:

• Level-1 Product Notice
  
• Level-2 Land Product Notice

We are pleased to announce that the operational Sentinel-2 Level-2A product distribution will extend its coverage to the entire globe on 13 December 2018.

Due to a network infrastructure issue, a product publication delay has occurred on all the Copernicus Data Hub Services from 2018-12-06 at 01:00 UTC to 2018-12-06 at 12:00 UTC.

The publication backlog has been recovered and the service is back to its nominal operations.

The Data flows affected by the issue are provided in the following list:

• Sentinel-1A NTC
  
• Sentinel-1A NRT
  
• Sentinel-3A OLCI NTC
  
• Sentinel-3A OLCI NRT
  
• Sentinel-3A SLSTR NTC
  
• Sentinel-3A SLSTR NRT
  
• Sentinel-3A STM NRT
  
• Sentinel-3A SYNERGY
  
• Sentinel-3B SLSTR NTC
  
• Sentinel-3B SLSTR NRT
  

We apologise for any inconvenience this might have caused to your activities.

Copernicus Sentinel-1A was unavailable from 5 December 2018 23:45 UTC to 6 December 2018 09:29 UTC, due to a SAR anomaly.
No data were generated during this period.

Due to an issue occurred at Payload Data Ground Segment level on 2 December 2018, Copernicus Sentinel-3A SRAL Level 1 and Level 2 Short Time Critical products from sensing time 01-12-2018T01:50:23 UTC to 01-12-2018T23:50:00 UTC will be delayed.

Infrastructure Security Maintenance activities are scheduled on:

• Wednesday, 28 November
  
• Thursday, 29 November
  
• Tuesday, 11 December
  
• Wednesday, 12 December
  

The maintenance will affect the Data Hub Services according to the following programme:
28 and 29 November from 07:00 to 16:30 UTC
Activities on security are foreseen on the following data hub instances, causing the publication delay of all Copernicus Sentinel-1, Copernicus Sentinel-2 and Copernicus Sentinel-3 products:

• Scientific Data Hub (including SciHub, API Hub and Sentinel-3 Pre-operations Data Hub)
  
• International Access Hub
  
• Copernicus Services Data Hub
  
• Collaborative Data Hub
  

Tuesday, 11 December from 07:00 to 16:30 UTC
Affected Data Hub Services:

• Copernicus Open Access Hub (also including API Hub, Sentinel-3 Pre-operations Data Hub and GNSS Rinex Pre-operational Hub)
  
• Collaborative Data Hub - Node 1
  

The Collaborative Data Hub - Node 2 and Node 3 will continue to be accessible to their registered users.

Wednsday, 12 December 2018 from 07:00 to 16:30 UTC
Affected Data Hub Services:

• Copernicus Services Data Hub
  
• Sentinel-3 Pre-operations Data Hub
  

During the maintenance windows service interruptions might occur. The publication of new products will be temporarily delayed for all Copernicus Sentinel missions.
We apologize for any inconvenience caused.

Collaborative users are informed that on Thursday, 22 November 2018 a maintenance activity will be performed on Access Node 1.
The maintenance will start at 8:00 UTC and will end at 12:00 UTC.
During the maintenance activity two short service interruptions will occur and the publication of new products will be temporarily suspended.
We apologize for the inconvenience that this might cause to your activities.

On 21 November 2018, a new Processing Baseline (02.11) will be deployed for Copernicus Sentinel-2 Level-2A products.

This new Processing Baseline features a sole change, which consists in the improvement of the terrain correction algorithm in mountainous areas, in order to avoid artefacts for pixels under semi-transparent clouds.

Processing Baseline 02.11 remains compliant with the current version of the Product Specification Document (PSD v.14.5).

Collaborative users are informed that, following the positive results achieved on Collaborative Node 1 (Sentinel-3A OLCI: publication on ColHub Node 1 on the 1st of October) the publication of Sentinel-3A OLCI NRT and NTC products will also be initiated on the Collaborative Hub Access Node 2 and Node 3 on 5 November.

S-3A OLCI publication on ColHub Node2 and ColHub Node 3 will be started with products ingested on 1st November 2018 at 00:00:00 UTC.

As a consequence of different contingencies at ground segment level, the availability in the Data Hubs of several Sentinel-2 products with sensing time between 30 October morning and 02 November morning is delayed.

The recovery of the missing products is ongoing and expected to be completed by next week.

We apologise for any inconvenience this may cause.

An unavoidable maintenance activity on the core infrastructure hosting the data hub service, involving replacement of switches interconnecting the servers to the rolling archive storage, is scheduled from 13:30 UTC on Monday 5 November to 11:00 UTC on 6 November 2018.

During the whole duration of the maintenance the following Data Hub Services will not be accessible:

• Copernicus Open Access Hub (also including API Hub, Sentinel-3A Pre-operations Data Hub and GNSS Rinex Hub)
  
• Copernicus Services Data Hub
  
• Collaborative Data Hub - Node 1
  

The publication of Copernicus Sentinel-5P products on the respective Pre-operations Data Hub will not be affected by the maintenance.
The Collaborative Data Hub - Node 2 and Node 3 will continue to be accessible to their registered users, however the publications of the NTC products will be suspended for the whole duration of the maintenance window. The Sentinel-1 NRT products will continue to be published on the Collaborative Data Hub Node 2.

A temporary access hub will be activated for providing access to the last two weeks of Sentinel Data without registration. The temporary data hub will be available at the following address:
https://tmphub.copernicus.eu/dhus

We apologize for any inconvenience caused

A routine decontamination activity of the Copernicus Sentinel-2B MSI is planned to take place over a continuous period of 24-hours between 12:00 UTC on 12 November and 12:00 on 13 November (corresponding approximately to the period between absolute orbits 8801 to 8815).
During this temporal window no MSI acquisition will take place.

Correlated calibration activities will be performed around the decontamination period that will further affect the nominal acquisition plan from 17:30 UTC on 11 November to 08:00 on 14 November.

ESA is pleased to inform users of the forthcoming update of Copernicus Sentinel-2 L1C and L2A products featuring an improved data quality thanks to the following evolutions:

1. The crenellation effect at the edge of Sentinel-2 images will be significantly reduced by estimating the inverse locations for grid points lying just after the edge of the acquisition.
2. The accuracy of the tile sensing time reported in the tile metadata will be improved, by computing for each tile the average acquisition time of all relevant pixels. The new tile sensing time will be reported in the field General_Info/SENSING_TIME of the Tile Metadata without format change.
3. The detector footprint vector files will provide the precise location of the boundary between detectors, without overlap. Such improvement will allow the users to have an accurate estimation of the viewing direction for each pixel.
4. The correlated across-track noise currently visible on very dark images will be significantly reduced thanks to an improved radiometric correction algorithm.

The Sentinel-2 products featuring this update will start being disseminated on 06 November 2018, and will tag the new Processing Baselines 02.07 for L1C products and 02.10 for L2A products.

It is highlighted that the format of the L1C and L2A products generated with the new Processing Baselines remains compliant with the current version of the Product Specification Document (PSD v14.5), while an updated description of the new Tile Sensing time field of the Tile Metadata will be included as part of the next issue of the Product Specification Document.

Please note that the SNAP software is aligned to the new Processing Baselines as well.