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'''Copernicus''' is the [[Earth observation]] component of the [[European Union Space Programme]], managed by the [[European Commission]] and implemented in partnership with the [[Member state of the European Union|EU member states]], the [[European Space Agency]] (ESA), the [[European Organisation for the Exploitation of Meteorological Satellites]] (EUMETSAT), the [[European Centre for Medium-Range Weather Forecasts]] (ECMWF), the [[Joint Research Centre]] (JRC), the [[European Environment Agency]] (EEA), the [[European Maritime Safety Agency]] (EMSA), [[Frontex]], [[European Union Satellite Centre|SatCen]] and Mercator Océan.<ref>{{Cite web |title=About Copernicus {{!}} Copernicus |url=https://www.copernicus.eu/en/about-copernicus |access-date=2023-01-20 |website=www.copernicus.eu}}</ref>
The programme aims at achieving a global, continuous, autonomous, high quality, wide range Earth observation capacity
Since 2021, Copernicus is a component of the [[European Union Space Programme|EU Space Programme]], which aims to bolster the EU Space policy in the fields of Earth Observation, Satellite Navigation, Connectivity, Space Research and Innovation and supports investments in critical infrastructure and disruptive technologies.
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** [[Sentinel-3A]] satellite was launched on 16 February 2016.
** [[Sentinel-3B]] satellite followed on 25 April 2018.
* [[Sentinel-4]], Europe’s first hyperspectral sounding mission in [[Geostationary Earth Orbit|GEO]], will provide data for atmospheric composition monitoring as a payload upon
* [[Sentinel-5 Precursor]], launched 13 October 2017 by a Eurockot Rokot vehicle from the Plesetsk Cosmodrome in Russia.<ref>{{Cite web |title=Copernicus: Sentinel-5P |url=https://www.eoportal.org/satellite-missions/copernicus-sentinel-5p |access-date=2022-12-28 |website=www.eoportal.org |language=en}}</ref> The primary purpose of this mission is to reduce the data gap (especially [[SCIAMACHY]] atmospheric observations) between the loss of [[Envisat]] in 2012, and the launch of Sentinel-5 in 2021.<ref name="ESAsentinels">{{cite web|title=ESA Sentinels-4, -5 and -5P|url=http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Sentinels_-4_-5_and_-5P|access-date=23 February 2015}}</ref>
* [[Sentinel-5]] will also provide data for atmospheric composition monitoring.<ref>{{Cite web |title=Copernicus: Sentinel-5 |url=https://www.eoportal.org/satellite-missions/copernicus-sentinel-5 |access-date=2022-12-28 |website=www.eoportal.org |language=en}}</ref> It
* [[Sentinel-6]] is intended to provide continuity in high precision [[Radar altimeter|altimetry]] sea level measurements following the [[Jason-3]] satellite.<ref>{{Cite web |title=Copernicus: Sentinel-6 Michael Freilich |url=https://www.eoportal.org/satellite-missions/copernicus-sentinel-6-michael-freilich |access-date=2022-12-28 |website=www.eoportal.org |language=en}}</ref>
** [[Sentinel-6 Michael Freilich|Sentinel-6A]], was launched in November 2020 by a [[SpaceX]] [[Falcon 9]] vehicle from [[Vandenberg Space Launch Complex 4|Vandenberg SLC-4E]].<ref>{{cite web|last=Clark |first=Stephen|url=https://spaceflightnow.com/2020/11/29/photos-falcon-9-launches-and-lands-at-vandenberg-air-force-base/|title=Photos: Falcon 9 launches and lands at Vandenberg Air Force Base |publisher=Spaceflight Now|date=29 November 2020}}</ref>
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* '''[[European Remote-Sensing Satellite|ERS]]''': the European Remote Sensing Satellite ERS-1 (1991–2000) was ESA's first Earth observation satellite. ERS-2 (1995–2011) provided data related to ocean surface temperature, winds at sea and atmospheric ozone.
* '''[[Envisat]]''' (2002–2012): launched in 2002, ESA's Envisat was the largest civilian Earth Observation spacecraft ever built. It carried sophisticated optical and radar instruments among which the Advanced Synthetic Aperture Radar (ASAR) and the Medium Resolution Imaging Spectrometer (MERIS). Envisat provided continuous observation and monitoring of the Earth's land, atmosphere, oceans and ice caps. After losing contact with the satellite on 8 April 2012, ESA formally announced the end of Envisat's mission on 9 May 2012.<ref name="missionend">{{cite web|url=http://www.esa.int/esaCP/SEM1SXSWT1H_index_0.html|title=ESA declares end of mission for Envisat|publisher=ESA|date=9 May 2012}}</ref>
* '''[[Living Planet Programme|Earth Explorers]]''': ESA's Earth Explorers are smaller research missions dedicated to specific aspects of
** [[Soil Moisture and Ocean Salinity|SMOS]] (Soil Moisture and Ocean Salinity), launched on 2 November 2009.
** [[CryoSat-2]] (the measurement of the thickness of floating ice), launched on 8 April 2010.
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