How Freyr reads your fields

Freyr uses Sentinel-2 imagery to estimate how green your crops are — a proxy for vigour, not a direct measurement. This reading is called a vegetation index — think of it as a greenness score for each part of your field.

A high score (shown in green) means strong greenness. A lower score (amber or red) suggests the crop may be under stress. NDVI can’t tell you the cause — it highlights where to look on the ground. Freyr checks every few days, so you can catch changes early.