International Earth Rotation and Reference Systems Service

The International Earth Rotation and Reference Systems Service (IERS) is an organization that monitors Earth's orientation in space. It provides precise measurements of how the Earth spins and wobbles, ensuring accurate positioning for navigation, satellite communication, and scientific research. By observing Earth's rotation and shape, IERS helps maintain standardized coordinate systems, enabling consistent and reliable location data worldwide. It plays a critical role in aligning our reference frames with Earth's actual movements, facilitating advancements in technology and understanding of Earth's dynamics.