Corrections to Section 6.1.3, pp. 6-8.

The references to Nerem and Klosko (1996) and Cheng (1996) were omitted from the final reference list in section six. The references are listed below.


  1. Nerem, R. S., and S. M. Klosko, Secular variations of the zonal harmonics and polar motion as geophysical constraints, in Global Gravity Field and Its Temporal Variations, Vol. 116, IAG Symposia, ed. by R. H. Rapp, A. A. Cazenave, and R. S. Nerem, pp. 152-163, Springer Verlag, Berlin, 1996.
  2. Cheng et al., 1996, should read Cheng et al., 1997:

Cheng, M. K., C. K. Shum, B. D. Tapley, J. Geophys. Res., 102(B10), 22377-22390, October 1997.