Which of the following is a source transmitting weather data to aircraft?

The Automatic Terminal Information Service (ATIS) serves as a vital source for transmitting essential weather data to aircraft. It provides pilots with up-to-date information about weather conditions at airports, as well as important operational details such as runway conditions, active runways, and any notices to airmen (NOTAMs). The ATIS broadcasts continuous audio messages which allow pilots to obtain the latest information before they approach or depart from an airport.

This continuous information stream aids pilots in making informed decisions regarding flight operations, enhancing safety and efficiency. While other sources may also play roles in providing weather data, ATIS specifically focuses on timely updates pertinent to terminal operations, directly helping pilots in their pre-flight and arrival preparations.