Atmospheric ties in the geodetic combinations: Implications for a global terrestrial reference frame

Dhiman Ranjan Mondal1, Pedro Elosegui1, James L Davis2 and Virgilio Brito Mendes3, (1)MIT Haystack Observatory, Westford, MA, United States, (2)Columbia University of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States, (3)Univ Lisbon, Lisboa, Portugal