A minor evolution of the Sentinel-1 product format is foreseen, impacting the format of the Level-1 and Level-2 operational user products.
For the Level-1 products, the changes aim at introducing azimuth denoising information (in addition to the range vector already available). The combined usage of the two vectors will allow users to perform a full 2D denoising of Sentinel-1 products.
For the Level-2 products, some minor evolutions are included to improve the operational usage and scientific exploitation of these products.
The format change will take place in Q1 2018. A s1tbx module update will be provided to the users so that SNAP can handle this new product format.
The new product specification can be found behind these links:
https://sentinels.copernicus.eu/documents/247904/1877131/Sentinel-1-Product-Specification
Sample products are already available via the Copernicus Scihub: