Which of the following is a source of weather data for pilots?

The Aviation Digital Data Service (ADDS) is specifically designed to provide critical weather information relevant to aviation. It aggregates and delivers data such as real-time weather observations, forecasts, and other atmospheric information necessary for pilots to make informed decisions during flight operations. The service is tailored to meet the needs of the aviation community, ensuring that pilots have access to timely and precise weather data.

In contrast, while NASA does conduct extensive research on weather and climate, it is not primarily focused on delivering operational weather data for aviation purposes. Commercial Weather Services may offer valuable weather information, but they are typically not as widely utilized or specifically tailored as ADDS for immediate aviation use. Flight Training Services are geared towards education and training rather than providing real-time weather information crucial for in-flight decision-making. Thus, ADDS stands out as the optimal source for pilots seeking weather data.