KTH / EE / Space and Plasma Physics / Research Tools / Spacecraft


Sweden's second satellite with a significant contribution from Germany. Launched on 6 October 1992 from Jiuquan satellite launch centre in the Gobi Desert, People's Republic of China, into a 600 by 1770 km orbit with 63 degrees inclination. It has since been delivering some 200 megabytes' worth of data each day. Freja ceased to operate on 14 October 1996. The seven instruments on board were built by groups in Sweden, Germany, Canada and the United States. As with Viking, the Alfvén Laboratory built the instrument measuring the electric field. The main scientific objective is also here the auroral acceleration processes, but in this case the satellite is observing fields and waves below the acceleration region and particles after they have been accelerated.

The group has authored or co-authored more than 35 refereed publications based on electric field data from Freja.

Freja Data Summary Plots are available online from the Johns Hopkins University.

For more information contact Göran Marklund.

Published by: School of Electrical Engineering

Last updated: 2013-06-18