Provisional HLS Version 1.5

[LP DAAC - afriesz]

Data products from the HLS version 1.5 collection are consider provisional. What does it mean when a data product is provisional?

[LP DAAC - afriesz]

The HLS version 1.5 collection has been labeled as provisional because the data products continue to go through incremental product improvements and have not yet been validated for their science quality. These data should not be used in science research or applications. HLS version 1.5 will soon be replaced by a new version that will meet science quality standards. However, by making these provisional data products available, the science community has a unique opportunity to provide feedback on the data prior to a vetted, science quality, data release. Users are encouraged to submit feedback or questions to the LP DAAC User Services or post to the Earthdata Forum.

[spkearney]

Do you know if there is any estimated date for when the 'science-quality' dataset will be made available? Also, I see on EarthData that while there is very little provisional data available prior to October 2020, the provisional dataset appears to be complete (every 2-3 days) starting in October 2020. Do you know if the plan is to continue providing this provisional data stream going forward until the new 'science-quality' data is available?

Any info you have is much appreciated! Thank you.

[LP DAACx - lien]

Hi,
The plan right now is April for the V2.0 science quality stuff and yes they will continue to process up until a release date is set in stone for the provisional stuff. The only caveat being I'm not sure how spotty that might be..................we have had them dump data at one time quite often into our test environment and I would anticipate it may come in like that for a bit. Please let me know if you have any questions.
Thanks,
Brett

[LP DAAC - afriesz]

Adding to @lien's comments... The HLS team and the LP DAAC are targeting a spring 2021 release for the official 'science-quality' S30 and L30 data products. The target timeframe may shift pending science reviews and any changes in production code.

Provisional data streams (S30 currently; L30 beginning ~ January 2021) will continue until the official 'science-quality' data products are made available.

[sidharth94]

Hi , thank you for this amazing dataset!

I would be glad if anyone could clarify why in this dataset there are 2 images per date?
I have also seen the same pattern in AWS Sentinel-2 L2A COGs too.

Is there some difference between the images? They do seem to have slightly different timestamps in the hour and minutes part.

Thank you in advance ! :)

[spkearney]

Are there any updates on when the full v1.5 dataset might be available?

[LP DAAC - afriesz]

@sidharth94 ,

I can't speak toward what you're seeing with the AWS Sentinel-2 L2A COGs.

With he HLS collection there will be occasions when Landsat 8 and Sentinel-2 capture observations on the same day for the same area. The HLS L30 and S30 COG files will have the same date stamp but will have a different hours:minutes:seconds stamp.

[LP DAAC - afriesz]

@spkearney

Users are encouraged to use the HLSL30 V2 (https://lpdaac.usgs.gov/products/hlsl30v002/) and HLSS30 V2 (https://lpdaac.usgs.gov/products/hlss30v002/) data products which were released on August 24, 2021 and have achieved stage 1 validation. Provisional HLS V1.5 data have not been validated for their science quality and should not be used in science research or applications. Historical and forward processing of HLS V2 will continue into 2022, with completion of the historical archival processing expected in mid- to late-2022

[spkearney]

Got it - thank you for the update.