TY - RPRT TI - An Experimental Kalman Filter Approach to the International Terrestrial Reference Frame Realization AU - Wu, Xiaoping AU - Abbondanza, Claudio AU - Altamimi, Zuheir AU - Chin, T. Mike AU - Gross, Richard AU - Heflin, Mike PY - 2012 UR - https://ntrs.nasa.gov/citations/20130000215 ID - 20130000215 ER -