Stability of Determining the Earth Rotation Parameters (ERP) with VLBI

1988 ◽  
pp. 417-420
Author(s):  
Shifang Luo ◽  
Dawei Zheng
Keyword(s):  
Earth Rotation ◽  
The Earth ◽  
Earth Rotation Parameters ◽  
Rotation Parameters

scholarly journals The effect of earthquakes on the ERP during 1977–1985

1988 ◽  
Vol 128 ◽  
pp. 399-404 ◽  
Author(s):  
Richard S. Gross
Keyword(s):  
Earth Rotation ◽  
The Earth ◽  
Time Period ◽  
Earth Rotation Parameters ◽  
Rotation Parameters ◽  
Large Earthquakes

The effect on the Earth Rotation Parameters (ERP) of all the large earthquakes that occurred during 1977–1985 is evaluated. It is found that they cannot have caused the variations observed in the ERP during this time period.

scholarly journals Procedure for VLBI Estimates of Earth Rotation Parameters Referred to the Nonrotating Origin

1991 ◽  
Vol 127 ◽  
pp. 77-84 ◽  
Author(s):  
N. Capitaine ◽  
A.M. Gontier
Keyword(s):  
Earth Rotation ◽  
Partial Derivatives ◽  
The Earth ◽  
Earth Rotation Parameters ◽  
Vlbi Data ◽  
Rotation Parameters ◽  
Derivatives Of ◽  
Rotational Transformation

AbstractThis paper investigates the practical use of the nonrotating origin (NRO) (Guinot 1979) for estimating the Earth Rotation Parameters from VLBI data, which is based on the rotational transformation between the geocentric celestial and terrestrial frames as previously derived by Capitaine (1990). Numerical checks of consistency show that the transformation referred to the NRO is equivalent to the classical one referred to the equinox and considering the complete “equation of the equinoxes” (Aoki & Kinoshita 1983). The paper contains the expressions for the partial derivatives of the VLBI geometric delay to be used for the adjustment of the pole coordinates, UT1 and deficiencies in the two celestial coordinates of the Celestial Ephemeris Pole (CEP) in the multiparameters fits to VLBI data. The use of the NRO is shown to simplify the estimates of these parameters and to free the estimated UT1 parameter from the model for precession and nutation.

scholarly journals Stability of Determining the Earth Rotation Parameters (ERP) with VLBI

1988 ◽  
Vol 129 ◽  
pp. 417-420
Author(s):  
Shifang Luo ◽  
Dawei Zheng
Keyword(s):  
Earth Rotation ◽  
Polar Motion ◽  
Systematic Errors ◽  
Geometric Effect ◽  
The Earth ◽  
Geometric Uncertainty ◽  
Earth Rotation Parameters ◽  
Rotation Parameters ◽  
The Stability

By using the observations of IRIS network, the stability of determinang ERP with VLBI is studied. It is concluded that the uncertainties from initial values of ERP, the errors of other parameters are at the same level as the formal errors in determination of ERP. The geometric effect on determination of ERP is important and appears as systematic errors. Geometric uncertainty on polar motion is greater than that on UT1. and specially much worse for the continenal network. The stability of determining ERP with VLBI can be improved either by increasing new stations at reasonable location in a VLBI network or by increasing new networks.

The International DORIS Service is preparing the future

2020 ◽  
Author(s):  
Pascale Ferrage ◽  
Laurent Soudarin ◽  
Frank Lemoine
Keyword(s):  
Earth Rotation ◽  
International Association ◽  
Tracking System ◽  
Tectonic Plate ◽  
Plate Motions ◽  
The Earth ◽  
Earth Rotation Parameters ◽  
The Future ◽  
Rotation Parameters

<p>The DORIS system recorded its first measurement on February 3rd, 1990, from the SPOT-2 remote sensing satellite. 30 years after, the system is at its best. DORIS has proven greatly valuable for geodesy and geophysics applications: measuring tectonic plate motions, determination of the rotation and the gravity parameters of the Earth, contributing to the international reference system. Technological and methodological improvements have allowed the improvement in the estimates of the positions of the DORIS tracking ground stations, the Earth rotation parameters and other geodetic variables such as the geocenter and the scale of the ITRF.<br>The International DORIS Service (IDS) was created in 2003 under the umbrella of the International Association of Geodesy (IAG) to foster scientific research related to the French DORIS tracking system and to deliver scientific products, mostly related to the International Earth rotation and Reference systems Service (IERS). Since its start, the organization has continuously evolved, leading to additional and improved operational products from an expanded set of DORIS Analysis Centers. IDS is now based on a reinforced structure with two Data Centers, six Analysis Centers, four Associate Analysis Centers, and a Combination Center. Using the experience gained in the preparation of the ITRFs, many improvements were made all along both in data analysis and on technical aspects. After the IDS Retreat held in June 2018, the IDS GB worked on the development of a strategic plan for the IDS. In the coming years, IDS will focus on growing the community, extending the DORIS applications, and improving the technology, the infrastructure and the processing.<br>This presentation addresses the recent achievements made by IDS and how the service is preparing the future.</p>

Rotational-oscillatory variations in the Earth rotation parameters within short time intervals

2013 ◽  
Vol 57 (5) ◽  
pp. 391-399 ◽  
Author(s):  
L. D. Akulenko ◽  
Yu. G. Markov ◽  
V. V. Perepelkin ◽  
L. V. Rykhlova ◽  
A. S. Filippova
Keyword(s):  
Earth Rotation ◽  
Time Intervals ◽  
The Earth ◽  
Earth Rotation Parameters ◽  
Rotation Parameters ◽  
Short Time

The Earth rotation parameters determined with the new IRIS-P VLBI network

1988 ◽  
Vol 31 ◽  
pp. 657-662 ◽  
Author(s):  
K. Yokoyama ◽  
S. Manabe ◽  
T. Hara ◽  
T. Yoshino ◽  
Y. Takahashi ◽  
...  
Keyword(s):  
Earth Rotation ◽  
The Earth ◽  
Earth Rotation Parameters ◽  
Rotation Parameters

scholarly journals The Effects of the Reference Frames and of their Realization on the Earth Rotation Parameters Computed from Different Observational Techniques

1980 ◽  
Vol 56 ◽  
pp. 135-144
Author(s):  
Nicole Capitaine ◽  
Martine Feissel
Keyword(s):  
Reference Frame ◽  
Earth Rotation ◽  
High Frequency ◽  
Reference Frames ◽  
The Earth ◽  
Earth Rotation Parameters ◽  
Rotation Parameters ◽  
Using Data ◽  
Observational Techniques ◽  
Numerical Estimations

AbstractThe inaccuracies in the reference frames actually realized by the different techniques for measuring the Earth’s rotation are theoretically investigated. The intercomparison of the available series of measurements provides numerical estimations of these defects. Using data corrected for reference frame effects high frequency fluctuations of UT1 are detected.

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