How accurate is
Atmosphera?
Our UV and solar radiation models are trained on NASA satellite measurements and independently validated on held-out 2023 data — never seen during training.
Predicted vs actual UV Index — test year 2023
Model predictions against NASA satellite measurements. Training used 2019–2022 data only — 2023 was never seen.
Solar radiation accuracy — test year 2023
Predicted vs measured solar radiation (W/m²) across diverse global conditions.
Performance across climate zones
Validated across diverse climates. The model generalises well — it has never been tuned to a specific region.
What powers the model
Each prediction combines satellite-derived training data with real-time local inputs.
NASA MERRA-2 satellite data
Training data sourced from NASA's Modern-Era Retrospective Analysis — the same dataset used by climate and atmospheric researchers worldwide.
Real-time solar geometry
Solar zenith angle is computed live from coordinates and UTC time. It changes every minute — no approximation or lookup table.
Live weather from OpenWeatherMap
Current cloud cover, temperature, humidity and wind are fetched in real time and passed as inputs to the model on every request.
Elevation-aware predictions
UV increases significantly with altitude. The model accounts for local elevation — critical for high-altitude cities across Central Asia, Africa, and Latin America.
Model trained on 2019–2022 · Validated on independent 2023 test set
Satellite reference: NASA POWER / MERRA-2 · Weather inputs: OpenWeatherMap