SENTINEL 1C

SENTINEL 1C is an active satellite operated by ESA / Copernicus (ESA (European Space Agency)), launched on 2024-12-05 from Guiana Space Centre, Kourou. It orbits in Low Earth Orbit (LEO) at altitudes between 697 km and 699 km with an inclination of 98.2°. It travels at approximately 27,033 km/h (7.51 km/s), completing one full orbit every 99 minutes — that’s roughly 14.59 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 SENTINEL 1C in real time using the latest two-line element set (TLE) data, providing live position, altitude, speed and orbital path updated continuously.

SENTINEL 1C orbits at an average altitude of 698 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 SENTINEL 1C’s average altitude, there are currently 272 active payloads and 1,433 tracked debris or rocket body fragments — notable neighbours include TERRA, AQUA, LANDSAT 9. With an inclination of 98.2°, SENTINEL 1C passes over latitudes between 98.2°N and 98.2°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. ESA (European Space Agency) operates approximately 93 active satellites in total, of which 8 share a similar altitude band with SENTINEL 1C.