Which system broadcasts weather data directly to pilots?

The Automated Weather Observing System (AWOS) is designed to collect, process, and disseminate weather data directly to pilots. AWOS stations provide real-time weather observations, including critical information such as wind speed and direction, visibility, temperature, and other meteorological data essential for safe flight operations. The system typically broadcasts this information continuously or at regular intervals, ensuring that pilots have access to the latest weather conditions, which is crucial for flight planning and in-flight decision-making.

Other systems mentioned also serve important roles in weather data reporting, but they do not primarily focus on direct broadcast to pilots in the same manner as AWOS. The Automated Surface Observing System (ASOS) collects and disseminates similar data but is primarily used for aviation and meteorological purposes rather than direct pilot broadcasts. The Automated Flight Service Station (AFSS) provides pilots with weather briefings and flight-related information, while the Direct User Access Terminal System (DUATS) allows pilots to access weather data via the internet or telephone, but is not a broadcast system directing information specifically to pilots.