UWE-2

UWE-2 is an active satellite operated by Germany, launched on 2009-09-23 from SRI. After 17 years in orbit, it continues to be tracked by global surveillance networks. It orbits in Low Earth Orbit (LEO) at altitudes between 689 km and 696 km with an inclination of 98.4°. It travels at approximately 27,043 km/h (7.51 km/s), completing one full orbit every 99 minutes — that’s roughly 14.60 orbits per day. Its near-polar, sun-synchronous orbit means it passes over any given point on Earth at approximately the same local solar time, ideal for consistent Earth observation lighting conditions. Its near-circular orbit (eccentricity close to zero) means it maintains a very consistent altitude throughout each revolution. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~10–25 years. Orbital Radar tracks UWE-2 in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

UWE-2 orbits at an average altitude of 693 km in a sun-synchronous orbit (SSO), a specialised subset of LEO where the orbital plane precesses to maintain a constant angle relative to the Sun. This provides consistent lighting conditions on every pass — essential for Earth observation, weather monitoring and environmental science. Within ±50 km of UWE-2’s average altitude, there are currently 283 active payloads and 1,362 tracked debris or rocket body fragments — notable neighbours include TERRA, AQUA, LANDSAT 9. With an inclination of 98.4°, UWE-2 passes over latitudes between 98.4°N and 98.4°S, providing near-global coverage including the polar regions. Polar and near-polar orbits are used for reconnaissance, weather monitoring and Earth-observation missions that need to image every part of the planet. Germany operates approximately 80 active satellites in total, of which 8 share a similar altitude band with UWE-2.