SENTINEL 3B
Live Position
Ground Track · Last 90 Minutes
Upcoming Passes · Over Your Location
About This Satellite
Sentinel-3B, launched in April 2018, works in tandem with Sentinel-3A to halve the revisit time of the ocean-monitoring pair, improving sea-level, temperature, and colour measurements for the Copernicus program.
Source: Wikipedia — Sentinel-3B (CC BY-SA 4.0)
SENTINEL 3B is a cataloged satellite tracked under NORAD ID 43437 with international designator 18039A. According to the GCAT master catalog, it was built by THALES, on the Sentinel-3A platform, with a launch mass of about 1250 kg, with a shape described as Box + 1 pan. According to the TLE snapshot used when this page was generated (2026-08-18), its LEO orbit had an apogee of about 811 km and a perigee near 809 km, with an inclination of 98.62° and a period of roughly 100.9 minutes; at apogee its speed was about 7.45 km/s. Positions on this page are near-real-time SGP4 predictions propagated from the latest two-line element (TLE) data.
In the TLE snapshot used to generate this page, SENTINEL 3B's apogee was 811 km, where its speed was about 7.45 km/s, completing about 14.3 orbits of Earth per day. Track it live on the map above or in the JOT orbital map.