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license: cc-by-4.0
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## Dataset

**Aiice** benchmark dataset for Arctic sea ice concentration (SIC) forecasting, 
based on [OSI-SAF](https://osi-saf.eumetsat.int) satellite products (CC BY 4.0).

### Coverage
- **Period:** October 1978 – April 2026
- **Resolution:** 25 km spatial, daily temporal
- **Grid:** 432×432 (Lambert Azimuthal Equal Area, EPSG:6931)

### Source products
| Product | Source | Period |
|---|---|---|
| OSI-450-a | SMMR, SSM/I, SSMIS | 1978–2020 |
| OSI-430-a | SSMIS | 2021–Oct 2025 |
| OSI-438 | AMSR2 | Oct 2025–present |

### Processing
Raw NetCDF files were downloaded from `osisaf.met.no` and converted to 
NPY matrix format. The `ice_conc` variable (fully filtered SIC with 
atmospheric correction) was extracted for each timestep, yielding 
432×432 matrices in the 0–100 value range.