scholarly journals High Frequency Variations of Earth Rotation Parameters from GPS and GLONASS Observations

Sensors ◽  
2015 ◽  
Vol 15 (2) ◽  
pp. 2944-2963 ◽  
Author(s):  
Erhu Wei ◽  
Shuanggen Jin ◽  
Lihua Wan ◽  
Wenjie Liu ◽  
Yali Yang ◽  
...  
Keyword(s):  
Earth Rotation ◽  
High Frequency ◽  
Earth Rotation Parameters ◽  
Rotation Parameters ◽  
Frequency Variations

Estimating variations in Earth rotation using GPS, GLONASS, and Galileo

2021 ◽  
Author(s):  
Radosław Zajdel ◽  
Krzysztof Sośnica ◽  
Grzegorz Bury ◽  
Kamil Kazmierski
Keyword(s):  
Earth Rotation ◽  
High Frequency ◽  
Low Frequency ◽  
Earth’S Rotation ◽  
Earth's Rotation ◽  
The Earth ◽  
Earth Rotation Parameters ◽  
Space Geodetic Techniques ◽  
Rotation Parameters ◽  
Frequency Variations

<p>Variations in the Earth's rotation can be examined in the low-frequency and high-frequency temporal scales. The low-frequency variations are dominated by the annual and Chandler wobbles, while the high-frequency variations are primarily caused by tidal effects and mass redistributions within the system Earth. Depending on the purpose, the Earth Rotation Parameters (ERPs) can be estimated in different time resolutions using space-geodetic techniques, especially using GNSS. However, the residual signals between different space geodetic techniques or satellite constellations indicate system-specific differences, which have to be correctly identified.</p><p>This research provides the daily, and sub-daily series of Earth Rotation Parameters (ERPs) estimated using GPS, GLONASS, and Galileo observations. We test different sampling intervals of estimated ERPs from 1h to 24h. The GNSS-based sub-daily estimates have been compared with the external models of variations in ERPs induced by the ocean tides from the IERS 2010 Conventions, a new model by Desai-Sibois, and the VLBI-based model by Gipson.</p><p>Any system-specific ERPs are affected by the orbital and draconitic signals. The orbital signals are visible in all system-specific ERPs at the periods that arise from the resonance between the Earth's rotation and the satellite revolution period, e.g., 8.87h, 34.22h, 3.4 days, 10 days for Galileo; 7.66h, 21.29h, 3.9 days, 7.9 days for GLONASS; 7.98h (S3 tidal term), 11.97h (S2 tidal term), 23.93h (S1 tidal term) for GPS. In the Galileo and GLONASS solutions, the artificial non-tidal signals' amplitudes can reach up to 30 µas. The GPS-derived sub-daily ERPs suffer from the overlapping periods of the diurnal and semidiurnal tidal terms and the harmonics of the GPS revolution period. After recovery of 38 sub-daily tidal terms, the Galileo-based model is more consistent with the external models than the GPS-based model, especially in the prograde diurnal band. The results confirmed that the Desai–Sibois model is more consistent with GNSS observations than the currently recommended model by the IERS 2010 Conventions. Moreover, GPS-based length-of-day (LoD) is systematically biased with respect to the IERS-C04-14 values with a mean offset of −22.4 µs/day, because of the deep resonance 2:1 between the satellite revolution period and the Earth rotation. The Galileo-based and GLONASS-based solutions are almost entirely free of this issue. Against the individual system-specific solutions, the multi-GNSS solution is not affected by most of the system-specific artifacts. Thus, multi-GNSS solutions are clearly beneficial for the estimation of both daily and sub-daily ERPs.</p>

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.

scholarly journals Recent improvements in the U.S.N.O. combined solution for Earth rotation parameters

1988 ◽  
Vol 128 ◽  
pp. 241-245
Author(s):  
A. K. Babcock
Keyword(s):  
Earth Rotation ◽  
High Frequency ◽  
Time Intervals ◽  
Data Smoothing ◽  
Noise Characteristics ◽  
Earth Rotation Parameters ◽  
Core Solution ◽  
Combined Solution ◽  
Rotation Parameters ◽  
The Individual

The USNO combined solution for Earth rotation parameters, commonly known as CORE has recently been made more sensitive to high-frequency signals in the various types of input data. This is particularly important in the estimation of the variation in UT1—UTC which has recently been shown to have real fluctuations over time intervals of less than a week. A second modification was introduced to tailor the data smoothing to the particular noise characteristics of the individual techniques. This has resulted in a redistribution of the weights of these techniques, and in improved time-resolution and accuracy of the CORE solution.

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.

Sign in / Sign up

Export Citation Format

Share Document