A weather satellite is a type of satellite that is used to monitor and observe the Earth's atmosphere and climate. Two of the most famous weather satellites are TIROS (Television Infrared Observation Satellite) and ESSA (Environmental Science Services Administration). TIROS was the first successful weather satellite, launched in 1960, and was used to provide real-time images of the Earth's surface and clouds. ESSA was launched in 1966 and was used to measure atmospheric temperature, pressure, and humidity. Both satellites were instrumental in providing data for meteorologists to better understand and predict weather patterns.