Sentinel-3 is an Earth observation heavy satellite series developed by the European Space Agency as part of the Copernicus Programme. As of 2024, it consists of 2 satellites: Sentinel-3A and Sentinel-3B. After initial commissioning, each satellite was handed over to EUMETSAT for the routine operations phase of the mission. Two recurrent satellites, Sentinel-3C and Sentinel-3D, will follow in approximately 2026 and 2028 respectively to ensure continuity of the Sentinel-3 mission. thumb|305x305px|Model of Sentinel-3 Each Sentinel-3 satellite is designed to operate for seven years in a sun-synchr
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Sentinel-3 is an Earth observation heavy satellite series developed by the European Space Agency as part of the Copernicus Programme. As of 2024, it consists of 2 satellites: Sentinel-3A and Sentinel-3B. After initial commissioning, each satellite was handed over to EUMETSAT for the routine operations phase of the mission. Two recurrent satellites, Sentinel-3C and Sentinel-3D, will follow in approximately 2026 and 2028 respectively to ensure continuity of the Sentinel-3 mission. thumb|305x305px|Model of Sentinel-3 Each Sentinel-3 satellite is designed to operate for seven years in a sun-synchronous low-Earth orbit. The satellites use multiple sensors to measure topography, temperature, marine ecosystems, water quality, pollution, and other features for ocean forecasting and environmental monitoring.
==Overview== The Sentinel-3 satellites travel in a sun-synchronous orbit at an altitude of approximately , with an inclination of 98.6° and orbit cycle of approximately 100 minutes. The local time of descending node is 10:00 a.m. and nominal duration is 7.5 years.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).