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Sentinel-4 is a European Earth observation mission under development to support the European Union Copernicus Programme.It will focus on monitoring of trace gas concentrations and aerosols in the atmosphere to support operational services covering air-quality near-real time applications, air-quality protocol monitoring, and climate protocol monitoring.
Each Sentinel mission is based on a constellation of two satellites to fulfill and revisit the coverage requirements for each mission, providing robust datasets for all Copernicus services. The Sentinel missions have the following objectives: Sentinel-1 provides all-weather, day and night radar imaging for land and ocean services. [17]
Sentinel-1 is the first of the Copernicus Programme satellite constellations conducted by the European Space Agency. [4] The mission was originally composed of a constellation of two satellites, Sentinel-1A and Sentinel-1B , which shared the same orbital plane.
Cornerstone 4 – Herschel, launched May 2009, completed – Infrared space observatory mission for general astronomy. [6] [8] Medium-sized missions. Medium 1 – Huygens, launched October 1997, completed – Titan lander component of the Cassini–Huygens mission; first landing in the outer solar system. [9]
Dr. Marc Buie, Sentinel Mission Scientist. Dr. Marc W. Buie (b. 1958) is the foundation's Sentinel Mission Scientist, and as well a U.S. astronomer at Lowell Observatory in Flagstaff, Arizona. Buie received his B.Sc. in physics from Louisiana State University in 1980 and earned his Ph.D. in Planetary Science from the University of Arizona in 1984.
Sentinel-1A is a European radar imaging satellite launched in 2014. It is the first Sentinel-1 satellite launched as part of the European Union 's Copernicus programme . The satellite carries a C-band Synthetic Aperture Radar which will provide images in all light and weather conditions.
The Sentinel Space Telescope was [1] a space observatory to be developed by Ball Aerospace & Technologies for the B612 Foundation. [2] [3] The B612 Foundation is dedicated to protecting the Earth from dangerous asteroid strikes and Sentinel was to be the Foundation's first spacecraft tangibly to address that mission.
The Sentinel-6 program includes two identical satellites, to be launched five years apart, Sentinel-6 Michael Freilich, which launched on 21 November 2020, [3] and Sentinel-6B, which will launch in 2025. [4]