Collaborative users are informed that on the 19th of April 2018 a data hub software update will be performed on all the three access nodes. The maintenance window will start at 7:00 UTC and end at 15:00 UTC.
The maintenance activity on Node 2 and Node 3 might cause short service downtimes or interrupt for few seconds ongoing downloads.
The update on Node 1 will be performed contextually to the scheduled infrastructure maintenance announced here

The update will not affect the currently available API and GUI interfaces towards the users but is meant for improving the data offer synchronization among the centres.

We apologize for any inconvenience this may cause.

Following the maintenance activities on the Data Hubs on 10 and 11 April 2018, two new activities have been scheduled aimed at improving the data access performance and to properly re-balance the traffic load:

• From 06:30 UTC to 17:00 UTC on 18 April 2018
  
• From 06:30 UTC to 17:00 UTC on 19 April 2018
  

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

18 April 2018
During the maintenance window no service downtimes are foreseen, however it is expected that performance will be degraded on the search and download functions on the following data hub services:

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

19 April 2018
During the maintenance window the following Data Hub Services will not be accessible:

• Sentinel-3A Pre-operations Data Hub and GNSS Rinex Pre-operational Hub
  
• Collaborative Data Hub - Node 1
  

We apologise for any inconvenience caused.

Due to a Sentinel-3A ground segment anomaly on 09 April 2018 at 21:38 UTC, NRT products were not available until this issue was resolved on 10 April 2018 at 08:30 UTC.

Users are informed that due to a major power outage in Frankfurt,
the Copernicus Services Data Hub has been unavailable from 19:36 UTC , 9 April 2018, to 09.37 UTC, 10 April 2018.

The incident temporarily suspended the publication of the following products:

• Sentinel-2B L1C
  
• Sentinel-2A L2A
  
• Sentinel-2B L2A
  
• Sentinel-3A All instruments and product levels
  

on all the Data Hub Services including:

• Open Hub and API Hub
  
• Sentinel-3 PreOps
  
• Collaborative Data Hub Node 1, 2 and 3
  
• International Access Hub
  

The publication data flow has been restored and back to nominal operations.
We apologise for the inconvenience this might have caused to your activities.

Infrastructure maintenance activities are scheduled from 13:00 UTC on 10 April to 11:00 UTC on 11 April 2018.
During the maintenance window 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 Pre-operational Hub)
  
• Collaborative Data Hub - Node 1
  
• Copernicus Services Data Hub
  

The International Access Hub and 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.

On 24 April 2018, a campaign will start on the Sentinel Open Data Access Hub and Copernicus Service Data Hub to republish the Sentinel-2 Level-1C products, from their historical format into the ‘Complete Single Tile' format introduced in December 2016.
Users who routinely automate the download of the new products should be aware that a significant volume of historical data will be published, and that these data may be re-downloaded automatically based on their ingestion date unless precaution is taken in the download scripts and workflows.
The affected dataset covers the sensing period from 04 July 2015 to 06 December 2016 (Sentinel-2A only). Approximately 340 thousand existing products will be repackaged creating over 1.3 million new products.
The republishing will cover the reformatting of the historical dataset of Sentinel-2A Level 1C products which do not feature either the Compact naming or the Complete Single Tile packaging characteristics, into their ‘Complete Single Tile' equivalent structure with the Compact naming representation.
The main features of the converted products as compared to their former counterparts are summarised below:

• The radiometric and geometric quality of the products will remain unchanged. Coherently with this, the Processing Baseline identifier (PB) tagging every product will also remain unaltered (i.e. expected between PB 02.01 and 02.04), and will keep tracing the quality of the data outlined in the data quality report, in relation to the processing baseline.
  
• The product formatting will comply with the Sentinel-2 Product Specifications Document (PSD) issue 14.2(*). In line with this format, the repackaging will take care of adding the TCI image inside the new products structure.
  

(*) It is highlighted that PSD 14.2 used for the repackaging will provide continuity with the format introduced on 06 December 2016 and used up until the end October 2017. Consequently, the generated products will not embed the subsequent evolution of the product format introduced on 23 October 2017, starting with PB 02.06.
The intended strategy for the replacement; is to publish the re-packaged data in batches. A list of the replacement data and the corresponding new re-packaged data will be available, prior to the publication of each batch. Once the batch has been published, the old format data will be removed, subsequently.
Please stay tuned for more news, before the commencement of the campaign.

With reference to the news published on the 21st of March,
users are informed that the start of Maintenance 2 has been postponed to the 3rd of April 2018, 13:00 UTC.
The maintenance activity will be completed at 11:00 UTC of the 4th of April 2018.

During the maintenance window 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 Pre-operational Hub)
  
• Collaborative Data Hub - Node 1
  
• Copernicus Services Data Hub
  

The International Access Hub and 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

Due to an anomaly on 17 March 2018, all NRT/NTC/STC Level-1 and Level-2 user products are missing from sensing time 2:49:54 UTC to 14:39:44 UTC (absolute orbits impacted 10834-10835, relative orbits 81-82 of cycle 29). The issue is currently under investigation and further notifications concerning the nature of the anomaly will be released afterwards.

As follow-up of the infrastructure maintenance activities performed at the beginning of March for upgrading the storage facilities, a new set of activities has been scheduled for improving the data access performances:

• Maintenance 1: from Monday, 26 March 2018 to Wednesday, 28 March 2018
  
• Maintenance 2: from Wednesday, 28 March 2018 to Thursday, 29 March 2018
  

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

Maintenance 1: from Monday, 26 March 2018, 7:30 UTC to Wednesday, 28 March 2018, 14:00 UTC
During the maintenance window no service downtimes are foreseen, however it is expected a performance degradation on the search and download functions on the following data hub services:

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

Maintenance 2: from Wednesday, 28 March 2018, 14:00 UTC to Thursday, 29 March 2018 11:00 UTC
During the maintenance window 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 Pre-operational Hub)
  
• Collaborative Data Hub - Node 1
  
• Copernicus Services Data Hub
  

The International Access Hub and 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
The date of Maintenance 2 could be moved to the 3rd of April 2018 if the completion of Maintenance 1 goes beyond the scheduled window.

We apologize for any inconvenience caused.

Due a planned out-of-plane orbit manoeuvre for Sentinel-3 on 14 March 2018, NRT/STC/NTC L1 and L2 user data could be degraded or missing in the following time interval:

• SRAL: User products could be degraded from sensing time 08:35 to 09:10 UTC (absolute orbits 10788-10789, relative orbits 35-37 of cycle 29).

A third node of the Collaborative Data Hub is now available at the following URL:
https://colhub3.copernicus.eu/dhus

This node offers the same data offer for the collaborative ground segment as the other nodes, including Sentinel-1 NRT data, with a three week rolling window. The node is operated in the GRNET centre and has access via standard internet and Geant. The node operates with a MTU 9000 (jumbo frames).

The third node is intended to replace Node-1 on the TSYS infrastructure, so we would like to advise all users of Node-1 to update their scripts/workflows to access this new node (or Node-2 on the OVH infrastructure). We would note additionally that the Sentinel-1 NRT data on Node-3 is synchronised with copy from the Node-1 so the unique identifier (UUID) for these data are the same on Node-3 as on Node-1 thus facilitating the transfer to this new node.

Pending the confirmation of overall performances for the collaborative data access, the Node-1 is intended to be dismissed at the end of March. A further news will be published to confirm the date.

Sentinel-1 Level-1 and Level-2 products generated from 13th March 2018 will be processed with the new IPF version 2.90 and made available following the new product format, as announced on 12 June 2017 and on 13 October 2017.

The extended planned maintenance of the Data Hub infrastructure on 5 and 6 March 2018 has been closed, and all services have been resumed as of 09:00 CET today.

Unfortunately the upgrade of the storage infrastructure in view of the upcoming Sentinel-5P production, Sentinel-2 L2 global production and Sentinel-3B was not completed as planned, and a subsequent maintenance will be announced following the anomaly root cause analysis review with the infrastructure vendor.

The backlog of production publication that has accumulated during the maintenance period will be gradually recovered and we expect the nominal timeliness of the publication to be recovered within the next 24 hours.

We apologise for the inconvenience.

The scheduled maintenance of the 5th of March 2018 has been extended to the 6th of March 2018. The maintenance consists in the upgrade of the storage infrastructure in view of the upcoming Sentinl-5p production, Sentinel-2 L2 global production and Sentinel-3B. Infrastructure incidents have occurred during the maintenance slowing down the upgrade process. The root cause has been identified and system engineers are currently working for restoring the situation as soon as possible. We apologise for the inconvenience this may cause to your activities.

Bridging from the initial Level-2A pilot production started in May 2017, we are pleased to confirm the long-term maintenance of the Level-2A as an operational product starting from mid-March this year, as well as its forthcoming evolution with systematic worldwide coverage planned for deployment by the summer.

The operational Level-2A production will remain relying on the Sen2Cor surface reflectance and classification algorithm that will include a set of small evolutions in line with the long-term perspective of this product.

Along this plan, it is highlighted that as of mid-March the Level-2A production (still limited to the Euro-Mediterranean region) will feature an updated product format:

• The naming logic of the files embedded in the L2A product package has been harmonised with that of the L1C product.
  
• The Metadata files (Product, Datastrip, and Tile levels) have been harmonised in structure and contents with that of the L1C.
  

Detailed information on the operational Level-2A product format is provided in the Sentinel-2 Products Specification Document (PSD version 14.4). Corresponding XSD schemas are also provided with the PSD document as attachments. In addition, a sample product is available for download.

Regarding the algorithm, this evolution features the following changes:

• Improvement of cloud screening and scene classification.
  
• Visibility iteration extended from 80 to 120 km.
  
• Exclusion of cloud shadow pixels for Water Vapour retrieval.
  
• Improved aerosol optical thickness retrieval.
  

The transition to the operational production will tag every new Level-2A product with the processing baseline number 02.07 (*). It is highlighted that the Level-2A processing baseline numbering is product specific, i.e. the Level-2A processing baseline number is and will be maintained independently from that of the Level-1C product.

The precise date of the transition will be announced shortly.

Updated versions of SNAP software Level-2A readers and Sen2Cor stand-alone processor will be made available before the release of the products.

Infrastructure maintenance activities are scheduled on Monday 5 March from 07:30 UTC to 19:00 UTC.

During the maintenance window the following Data Hub services will be unavailable:

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

The International Access Hub and the Collaborative Data Hub Node 2 will be available for queries and downloads but the products publication will be suspended until the end of the maintenance period.
Exception is made for the Sentinel-1 Near-Real-Time products that will be regularly published on ColHub Node 2

We apologize for any inconvenience this might cause.

Due to two separate Ground Segment anomalies on 24 and 25 February 2018, NRT/NTC/STC Level-1 and Level-2 user data could be degraded or missing in the following time intervals:

• SRAL: user products impacted from sensing time 22:54:51 to 23:04:51 UTC on 24 February (absolute orbit 10540, relative orbit 172 of cycle 28).

Collaborative users are informed that it has been registered a network incident on ColHub Node 2 on date 25 February 2018.
The incident started at 19:58 UTC for a duration of 3 hours and 54 minutes.
The root cause has been identified and fixed.
We apologise for the inconvenience that this might have caused to your activity.

Referring to the news published on 06 February, users are informed that the ground segment contingency has been solved through specific interventions at the network level and nominal Sentinel-2 product availability has resumed.

All delayed products have been recovered and published on the data hubs.

Due to a Ground Segment anomaly on 15 February 2018, NRT/NTC/STC user data could be degraded or missing in the following time interval:

• SRAL: user products impacted from sensing time 00:57:03 to 01:17:03 UTC on 15 February (absolute orbit 10399, relative orbit 31 of cycle 28).