On the length of day with 2008–2010 VLBI observations

Author

Wei, Erhu ; Liu, Jingnan ; Zhang, Qi ; Li, Xuechuan

Author_Institution

Sch. of Geodesy & Geomatics, Wuhan Univ., Wuhan, China

fYear

2011

fDate

9-11 Sept. 2011

Firstpage

2158

Lastpage

2161

Abstract

The analysis of the ΔLOD is of profound significance on climate forecasting, disaster prevention, deep space exploration, geodesy and other fields. With extremely high precision and angular resolution, VLBI plays the irreplaceable role on the analysis of the changes of the length of day. Based on this, in this paper, the ΔLOD sequence and its precision are estimated from VLBI observations during 2008-2010 with comparison with the results published by IVS. The half monthly, monthly, half yearly and yearly periods of the changes of ΔLOD is extracted with spectral analysis. At the same time, the integration curve map of the ΔLOD is made to analyze the seasonal and long-term changes of earth rotation. At last, the causes of the changes of ΔLOD are analyzed.

Keywords

radioastronomical techniques; radiowave interferometry; VLBI observations; climate forecasting; deep space exploration; disaster prevention; geodesy spectral analysis; integration curve map; Accuracy; Atmospheric modeling; Earth; Educational institutions; Geodesy; Interpolation; Spectral analysis; Earth rotation; LOD; OCCAM; VLBI;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Communications and Control (ICECC), 2011 International Conference on

Conference_Location

Ningbo

Print_ISBN

978-1-4577-0320-1

Type

conf

DOI

10.1109/ICECC.2011.6066276

Filename

6066276