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Tools \ Let It Snow

Let It Snow
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Code implementing a snow detection algorithm on various satellite products and temporal synthesis on time series of snow products.

Source code

Maturity : Maintained | Categories : Processing Chains (pipelines) | License : | Producer : CNES

Overview

This code implements :

  • Snow Cover extent detection algorithm LIS (Let It Snow) for Landsat-8 and SPOT4-Take5 data.
  • Fractional Snow Cover (FSC) for Sentinel-2 (which includes snow coverage)
  • Temporal syntheses based on time series of snow products (snow cover and/or FSC).

The algorithm documentation with examples is available here:

DOI

Access to Theia Snow data collection (L2B and L3B):

DOI:10.24400/329360/f7q52mnk

The input files are Sentinel-2 or Landsat-8 level-2A products from the Theia Land Data Centre or SPOT-4/5 Take 5 level-2A products and a Digital Terrain Model (DTM). The output is a Level-2B snow product.

The syntheses are temporally aggregated (level-3A) products derived from individual snow products after gapfilling. The three products are: the snow cover duration, the snow disappearance date and the snow appearance date. These products are typically computed over a hydrological year (more details : Snow cover duration map).

Usage

See usage page.

Installation

See installation page.

At CNES

Available as a module on Trex. Also as Docker/Singularity image on artifactory.

Resources

Tutorials

There is no available tutorial for this tool.

Contacts