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2. Ch. Reigber, P. Schwintzer, “A Challenging Microsatellite Payload for Geophysical Research and Application,” in: Small Satellites for Remote Sensing, Space Congress ’95, Bremen, May 24–25, 1995, pp. 83–89, European Space Report, Munich, 1995
3. Ch. Reigber, R. Casper, W. Päffgen, “The CHAMP Geopotential Mission,” IAA 2nd International Symposium on Small Satellites for Earth Observation, Berlin, April 12–16, 1999, pp. 25–28
4. Ch. Schmitt, H. Bauer, “CHAMP Attitude and Orbit Control System,” IAA 2nd International Symposium on Small Satellites for Earth Observation, Berlin, April 12–16, 1999, pp. 269–272
5. http://op.gfz-potsdam.de
/champ/systems/index_SYSTEMS.html