Protecting spectrum for weather, climate and early warnings

From satellites measuring the Earth’s atmosphere to weather radars tracking approaching storms, radio-frequency spectrum is fundamental to understanding our planet.

Meteorological services rely on spectrum both to collect environmental measurements and to transmit the resulting data. This is particularly important for passive sensors, which measure radio-frequency energy emitted naturally by the Earth and atmosphere to provide information on temperature, humidity, precipitation, ocean conditions and other environmental variables.

These observations underpin weather forecasts, climate monitoring, water-resource management and early warning systems that help protect lives and livelihoods.

But as demand for spectrum grows across radiocommunication services, increasing pressure is being placed on frequency bands used for weather, climate, water and Earth system monitoring. Protecting sensitive observations from radio-frequency interference is essential to maintaining the quality, availability and continuity of environmental information worldwide.

Any degradation in the quality or availability of observational data can reduce the reliability of forecasts and warnings. The consequences can extend well beyond meteorology, affecting public safety, economic activity, disaster preparedness and environmental protection.

Reliable and continuous access to interference-free spectrum is therefore essential for maintaining meteorological services and ensuring that critical information reaches decision-makers, emergency responders and communities.

The global observation ecosystem is evolving rapidly.

Major space programmes and coordinated international systems continue to form the backbone of global meteorological observations. At the same time, industry is advancing sensing technologies such as radars and radiometers, while commercial operators are providing additional sources of environmental data through small-satellite constellations.