XSAT

XSAT is an active satellite operated by Centre for Research in Satellite Technology (CREST) (Singapore), launched on 2011-04-20 from SRI. After 15 years in orbit, it continues to be tracked by global surveillance networks. It orbits in Low Earth Orbit (LEO) at altitudes between 798 km and 818 km with an inclination of 98.3°. It travels at approximately 26,825 km/h (7.45 km/s), completing one full orbit every 101 minutes — that’s roughly 14.25 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. At its current altitude, the estimated orbital lifetime before atmospheric re-entry is ~100–500 years. Orbital Radar tracks XSAT in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

XSAT orbits at an average altitude of 808 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 XSAT’s average altitude, there are currently 441 active payloads and 2,314 tracked debris or rocket body fragments — notable neighbours include NOAA 20, ONEWEB-0179, ONEWEB-0455. With an inclination of 98.3°, XSAT passes over latitudes between 98.3°N and 98.3°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. Singapore operates approximately 14 active satellites in total.