Following the recent upgrades to the Data Hub dissemination points we are pleased to announce that the Long Term Archive (LTA) Access interfaces are ready to be operated, part of the nominal regime to ensure the continued access to all Sentinel Data at all time.
As planned, the operations of the data dissemination will soon implement the roll-out of the oldest data from the online access and activation of the interfaces to allow to restore access to historic data from the LTA.
The Data Hub dissemination system continues to provide the unified access to all Sentinel Data: the catalogue will continue to publish all data, the discovery and download interfaces (both the graphical user interface and API) provide additional status information to indicate whether the product are online or offline.
Access to the product URL for data that are no longer available online will automatically trigger the retrieval of the data from the LTA, the actual download may be initiated once the data are restored (within minutes to hours). Full details are available in the updated user guides.
Roll-out of the data will start with the oldest Sentinel-1 RAW data and then proceed to the other Sentinel product types according to the production volumes and usage patterns. At least the latest year of Sentinel data will be kept online at all times.
The retention period for the various different product types will be tuned according to the usage patterns to ensure efficient access to the most recent and frequently downloaded data, the precise retention period (always greater than one year) is subject to change according to the operational experience.