NASA has a long and successful history of developing, launching and operating Earth-observing missions that have contributed significantly to our understanding of the planet. A coordinated series of polar-orbiting and low inclination satellites for long-term global observations on the Earth's surfaces were invented by scientists from various agencies around the world. By observing the Earth from space, satellites provide essential information on the ocean, ice, land environments, and the atmosphere. It helps us to monitor and protect our environment, manage our resources, ensure the safety and security of the public and understand the Earth as an integrated system. Satellite imagery and expertise are also used to support global humanitarian efforts and sustainable development.

This website offers simplified information on the satellite's launch date, status, main objective, and scientific observations on the mission from the past to future missions. It is hoped that this website can help the public to understand each role of satellites and how it helps our daily life.