Horwath, M, Dietrich, R, Barthelmes, F, Förste, C & Schwintzer, P 2007, '
CHAMP normal equation analysis for assessing sensitivities and parameter correlations.', Beitrag in Proceedings of the Joint CHAMP/GRACE Science Meeting, Potsdam, Deutschland,
6 Juli 2004 -
8 Juli 2004. <
https://media.gfz-potsdam.de/gfz/sec12/GSTM-2004/Horwath-etal_jcg.pdf>
Wiehl, M & Dietrich, R 2005,
Time-variable gravity seen by satellite missions: on its sampling and its parametrization. in C Reigber, H Lühr, P Schwintzer & J Wickert (Hrsg.),
Earth Observation with CHAMP: Results from Three Years in Orbit. Springer Link, Berlin, S. 121-126.
https://doi.org/10.1007/3-540-26800-6_19