Dear SNAP users and developers,
If you are interesting in time-series by far or not, you probably faced the problem of offline products.
As a reminder,
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.
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).
By trying to download an offline image, we trigger its reactivation following the rules :
Access to the product URL for data that are no longer available online will automatically trigger the retrieval from the LTA. The actual download can be initiated by the user once the data are restored (within 24 hours).
A user quota on the maximum number of requests per hour per user is set.
Products restored from the long term archives are kept online for a period of at least 3 days. Quota and keeping time will be fine tuned according to the usage patterns to ensure efficient access to the most recent and frequently downloaded data.
But the very slow quota leads to a very common error message :
The request is not accepted because the number of submitted requested exceeded the allowed user quota
If you play the game and focus on a single past image, the procedure is annoying but still manageable. If you want to do something more serious, it became very painful to work with automatic scripts.
I’m probably not the only one who developed an automatic tool that download and process SAR images using GPT. The Long Term Archive policy is really a pain to work with and I was asking myself how other people are dealing with it ?
Is there a workaround ? Note that I’m working in Antarctica a lot of mirrors are not accessible.
If we are numerous in this situation, is there a way to let ESA know about this issue? Do they plan to do something in the near future ?
All the best,