| ERS-2 Mosaic of different ERS-2 results 1995, 21 April (after launch) Various imaging systems ESA - European Space Agency ESA, ID number: ESAHSSUTYWC LL/37418 Like its predecessor ERS-1 (launched in July 1991 by an Ariane 4 and successfully operational in-orbit at an altitude of some 780 km), the ERS-2 satellite launched on 21.04.95 by an Ariane 4, is monitoring the Earth day and night under all weather conditions thanks to its powerful sharp-eyed, cloud-piercing radars. ERS-2 carries on board an instrument to help monitor the ozone layer around the Earth.
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