Agrícola · ao vivo

Cosecha de maíz en Iowa

Cuántas fanegas por acre proyecta nuestro modelo satelital, vs el USDA.

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n/a vs USDA WASDE state-level forecast

Observed: ainda sem observação · A fonte publica semanalmente, com ~5 dias de atraso.

Translation

Iowa produce ~17% del maíz de EE.UU. Nuestro modelo combina *NDVI* — el verdor de los cultivos visto por satélite — con humedad del suelo (SMAP) y lluvia (CHIRPS). Comparamos contra el reporte oficial del *USDA WASDE*. Cuando nuestro número difiere por más de 3 fanegas/acre, hay sorpresa para los futuros del maíz (CME ZC).

Methodology

Source

Sentinel-2 NDVI + NASA SMAP + CHIRPS + USDA NASS CDL

Cadence

Weekly during growing season (May–Oct)

Sensors / APIs

Sentinel Hub Statistical API (NDVI), NASA Earthdata SMAP L3, CHIRPS daily 0.05°, USDA NASS CDL cropland mask

AOI

Iowa state polygon, masked to corn pixels (USDA NASS CDL class 1)

Baseline

USDA WASDE state-level forecast

Uncertainty

Phase 1 reports state-level only; county disaggregation in Phase 2

Known biases

NDVI saturates at canopy closure — V12-R3 phenology window matters more than season-mean
Late-season heat stress underweighted vs reproductive-phase moisture
CDL mask refreshed annually — small acreage shifts within season undetected

Provenance

Source URL: https://nassgeodata.gmu.edu/CropScape/
License: NASA + USDA + ESA — public domain + Modified Copernicus Licence (mixed)

Para desenvolvedores e agentes de IA

/signals/iowa-corn-yield/brief.md — LLM-citable markdown
/api/signals/iowa-corn-yield — JSON + JSON-LD Dataset