Add dataset README
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README.md
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---
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license: cc-by-4.0
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tags:
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- sentinel-2
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- cloud-properties
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- remote-sensing
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- clouds
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- clouds-decoded
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---
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# Sentinel-2 Cloud Property Retrievals over the UK and India
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Rendered per-scene quicklook layers of cloud optical and microphysical properties
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retrieved from Sentinel-2 (MSI) Level-1C imagery over eight tiles (four in the UK
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and four in India). These images power the interactive report at
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[asterisk-labs-clouds-decoded-rain-check.static.hf.space](https://asterisk-labs-clouds-decoded-rain-check.static.hf.space). Cloud properties are estimated with the [clouds-decoded retrieval code](https://github.com/asterisk-labs/clouds-decoded), developed as part of the [clouds decoded project](https://asterisk.coop/project-pages/project-clouds-decoded.html) funded by ARIA.
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> **Scope.** Rendered **PNG layers only**.
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## Coverage
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| Region | Tiles (MGRS) |
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|--------|--------------|
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| UK | T29VMC, T30UVA, T31UDA, T31VDF |
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| India | T42QYE, T43PDM, T44PNB, T45QWB |
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~8,400 scenes spanning 2015–2026; each tile is ~110 × 110 km.
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## Layers
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Each scene directory holds these per-scene PNGs:
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| File | Description |
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|------|-------------|
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| `true_colour.png` | RGB true-colour composite |
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| `cloud_mask.png` | cloud / clear mask |
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| `cloud_height.png` | cloud-top height (m) |
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| `ice_composite.png` | ice / phase composite |
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| `properties_tau.png` | cloud optical thickness (τ) |
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| `properties_r_eff_liq.png` | liquid effective radius (µm) |
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| `properties_r_eff_ice.png` | ice effective radius (µm) |
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| `properties_ice_liq_ratio.png` | ice / liquid ratio (thermodynamic phase) |
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| `properties_uncertainty.png` | retrieval uncertainty |
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| `overview.png` | combined multi-panel overview |
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## Layout
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```
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figures/<SCENE_ID>/<layer>.png
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```
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`<SCENE_ID>` is the Sentinel-2 L1C product identifier
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(e.g. `S2A_MSIL1C_20150712T111036_N0500_R137_T31UDA_20231010T005751`), which
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encodes the acquisition date, relative orbit and MGRS tile.
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## Retrieval & sources
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Generated with the [clouds-decoded](https://github.com/asterisk-labs/clouds-decoded)
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processing chain applied to Sentinel-2 L1C.
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- Sentinel-2 MSI L1C — Copernicus / ESA
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## License
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CC-BY-4.0.
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