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Sweden's first satellite, Viking, was successfully launched on February 22, 1986, at 01:44 UT. It was carried into orbit with the French remote sensing satellite SPOT by an Ariane 1 booster, launched from French Guiana. Viking's perigee boost motor placed this relatively small satellite (∼520 kg) into a final 817 km×13,527 km polar orbit, where it is conducting scientific observations of complex plasma processes in the magnetosphere and ionosphere of the earth. The satellite carries experiments to measure electric fields, magnetic fields, charged particles, waves, and auroral images.