Geodetic and geophysical implications of the homogeneous reduction of pole coordinates (1899–1979) |
| |
Authors: | R O Vicente |
| |
Institution: | (1) Department of Applied Mathematics, Faculty of Sciences, Lisbon, Portugal |
| |
Abstract: | The new series ILS (H) of pole coordinates (1899.9–1979.0) computed in a homogeneous system has been employed for the determination
of the period of Chandler's component of polar motion. The comparison with a value derived from a previous series ILS (VY)
shows there is no significant variation in the period in spite of the known systematic errors affecting the ILS (VY) series.
Any high precision geodetic network adjustment has to take account of the pole coordinates defined by the ILS (H) series.
Such long series permitted the identification of another component of polar motion with a period of about 30 years. The polhode
derived from the ILS (H) series shows greater regularity than previously deduced polhodes and, therefore, we can conclude
that past investigations in geodesy and geophysics trying to correlated the irregularities of the polhode with different geophysical
phenomena, for instance, earthquakes, may have to be revised. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|