ERS-2 in testing

Like its predecessor ERS-1 (launched into orbit in July 1991 by Ariane-4 at an altitude of some 780 km), the ERS-2 satellite, launched on April 1995 by Ariane-4, is monitoring the Earth day and night under all weather conditions thanks to its powerful sharp-eyed, cloud-piercing radars. ERS-2 also carries an instrument to help monitor the ozone layer around the Earth