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