Launch of First Weather Satellite Vanguard 2

On 17/02/1959, the United States launched Vanguard 2 aboard a Vanguard SLV-4 rocket from Cape Canaveral, Florida, marking the deployment of the world’s first weather satellite. Developed as part of the Vanguard program, the satellite was designed to measure cloud cover distribution across Earth using optical sensors. Its mission represented an early effort to apply space technology to atmospheric observation during the early years of the Space Race. Vanguard 2 carried two optical telescopes equipped with photocells to scan Earth’s cloud patterns as the satellite orbited the planet. The data collected was transmitted to ground stations, where it was used to estimate global cloud coverage. Although the satellite encountered limitations due to its orbit and orientation, which reduced the quantity and consistency of usable data, it still demonstrated the feasibility of observing weather systems from space. The spacecraft operated in a highly elliptical orbit and transmitted data for several months. The mission provided early insights into the challenges of space-based meteorological observation, including issues related to satellite stabilization and data interpretation. Despite these constraints, Vanguard 2 established a foundation for future weather satellites, leading to more advanced systems capable of continuous global monitoring.