V1_0 was a preliminary processing. 93 products were distributed and then 1300 products over a few selected tiles in the Pyrenees, Alps and Atlas mountains from 30/11/15 to 19/06/17. V1_0 was not used in operational context but as a batch processing using LIS software version 1.2.1.
V1_4 between the 20/12/17 to the 16/02/18. Operational production on all Snow tiles produced by Theia. V1_4 was produced with LIS software version 1.2.1 using THEIA’s Sentinel2 L2A product versions V1_4.
V1_5 from 16/02/18 to now. Operational production on all Snow tiles produced by Theia. V1_5 was produced with LIS software version 1.2.1 using THEIA’s Sentinel2 L2A product versions V1_5.
The THEIA L2B Snow product description is available here.
The THEIA’s Sentinel2 L2A product versions are available here.