Analysis
How much do observed rainfall products disagree?
Relative bias against gauges and against each other, monthly anomaly agreement, triple collocation, dry-tercile detection (the anticipatory-action view), trends 1983–2020 and 2001–2025, drift and known breaks, and a per-country explorer.
/report/October 2026Which rainfall product should we trust where?
The products checked against rain gauges that none of them use, AMMA-CATCH in West Africa and TAHMO across Africa, on monthly and 3-month anomalies and dry-period detection. Elsewhere, skill is estimated from how the products agree, allowing for the inputs they share.
/which-product/October 2026Correlation explorer: any two products, any period
Pick two products and a period — calendar year, rainy season, or any 3-month window. A zoomable map shows their year-to-year correlation at every 0.5° pixel; click a pixel, or pick an admin-1 unit or country, for a year-by-year scatter.
/explorer/InteractiveCode