Earth-tide measurements with the superconducting gravimeter

1972 ◽  
Vol 77 (5) ◽  
pp. 926-937 ◽  
Author(s):  
W. A. Prothero ◽  
J. M. Goodkind
Keyword(s):  
Earth Tide ◽  
Superconducting Gravimeter

scholarly journals Detection of free core nutation resonance variation in Earth tide from global superconducting gravimeter observations

2018 ◽  
Vol 70 (1) ◽  
Author(s):  
Xiaoming Cui ◽  
Heping Sun ◽  
Jianqiao Xu ◽  
Jiangcun Zhou ◽  
Xiaodong Chen
Keyword(s):  
Earth Tide ◽  
Superconducting Gravimeter ◽  
Free Core Nutation

scholarly journals INVESTIGATION OF THE SOLID EARTH TIDE BASED ON GPS OBSERVATION AND SUPERCONDUCTING GRAVIMETER DATA

GEOMATIKA ◽  
2017 ◽  
Vol 22 (1) ◽  
pp. 29
Author(s):  
Arisauna Maulidyan Pahlevi ◽  
Kosasih Prijatna ◽  
Irwan Meilano ◽  
Ibnu Sofian
Keyword(s):  
Standard Deviation ◽  
Solid Earth ◽  
Earth Tide ◽  
Vertical Component ◽  
Vertical Displacement ◽  
Superconducting Gravimeter ◽  
Gps Data ◽  
Global Models ◽  
Station Data ◽  
Solid Earth Tide

<p class="Abstract"><em>According to Zheng (2006), vertical displacement caused by the solid earth tide often reaches in range 20 cm, and can exceed 30 cm in some stations. To measure solid earth tide we can use satellite system or sensitive gravimeters (Ito et al., 2009). This paper aims to investigate solid earth tide based on Global Positioning System (GPS) data compare with Superconducting Gravimeter (SG) data and solid earth tide global model. Processing GPS data using Kinematic Precise Point Positioning (KPPP) method within a year data from 1<sup>st</sup> January – 31<sup>st</sup> December 2011. We use BAKO GPS Permanent station data and Cibinong SG Station data. The location of BAKO station is close to Cibinong SG station, which is about 50 meters. </em><em>The result of this paper are solid earth tide which is derived from both devices have the same pattern, and it is dominated by semi-diurnal components. Applicability global models with SG observations has smaller residue with standard deviation is </em><em>0.0031</em><em> mgal, this result is equivalent with </em><em>0.0098</em><em> meter</em><em>. Comparison between the results of GPS observations to global models which have a standard deviation residue for vertical component is </em><em>0.0360 meters</em><em>.</em><em></em></p>

Global superconducting gravimeter observations and the search for the translational modes of the inner core

2000 ◽  
Vol 117 (1-4) ◽  
pp. 3-20 ◽  
Author(s):  
N. Courtier ◽  
B. Ducarme ◽  
J. Goodkind ◽  
J. Hinderer ◽  
Y. Imanishi ◽  
...  
Keyword(s):  
Inner Core ◽  
Superconducting Gravimeter

One-year long common view measurements with continuous gravimeters

2021 ◽  
Author(s):  
Franck Pereira Dos Santos ◽  
Pierre Vermeulen ◽  
Sylvain Bonvalot ◽  
Germinal Gabalda ◽  
Nicolas Le Moigne ◽  
...  
Keyword(s):  
Geodetic Network ◽  
Cold Atom ◽  
Superconducting Gravimeter ◽  
Common View ◽  
Long Term Stability ◽  
Earth Gravity ◽  
Measurement Session ◽  
One Year ◽  
Metrological Evaluation

&lt;p&gt;Since a few years, several laboratories, institutes or organizations through the world have acquired marketed quantum absolute gravimeters AQG developed by Muquans. Among their potentialities, these new generations of instruments are expected to complement the existing capabilities of long term monitoring of the Earth gravity field. A metrological evaluation of their performances for long-term measurements is thus a first step.&lt;/p&gt;&lt;p&gt;The LNE-SYRTE gravimetry laboratory in the suburb of Paris, has been designed to accommodate other gravimeters for metrological comparisons, tests and calibrations. Instruments of different classes operate in this well characterized laboratory: a laboratory-based absolute cold atom gravimeter (CAG) and a relative superconducting gravimeter iGrav. Both instruments allow for continuous measurements, Accuracy is guaranteed by the CAG and long-term stability by the iGrav.&lt;/p&gt;&lt;p&gt;We there have performed a more than one-year long measurement session with the initial version of the marketed quantum gravimeter AQG (AQG-A01).&lt;/p&gt;&lt;p&gt;An improved version of this AQG (AQG-B01) designed for outdoor measurement and recently acquired by RESIF (the French Seismologic and Geodetic Network) has been also implemented to close this session with a last month of simultaneous data recording involving all the instruments. Finally, we also performed supplementary accuracy tests, in particular to evaluate the Coriolis bias of the two AQG commercial sensors.&lt;/p&gt;&lt;p&gt;The talk will briefly present the different instruments to rapidly focus on the performances of the AQGs and results of the comparisons.&lt;/p&gt;

Analysis of Superconducting Gravimeter measurements at MunGyung station, Korea

2009 ◽  
Vol 47 (4) ◽  
pp. 180-190 ◽  
Author(s):  
Jeong Woo Kim ◽  
Juergen Neumeyer ◽  
Tae Hee Kim ◽  
Ik Woo ◽  
Hyuck-Jin Park ◽  
...  
Keyword(s):  
Superconducting Gravimeter

scholarly journals Determination of the complex frequencies for the normal modes below 1mHz after the 2010 Maule and 2011 Tohoku earthquakes

2014 ◽  
Vol 56 (5) ◽  
Author(s):  
Hao Ding ◽  
Wen-Bin Shen
Keyword(s):  
Time Series ◽  
Normal Modes ◽  
Power Spectra ◽  
Tohoku Earthquake ◽  
Superconducting Gravimeter ◽  
Width Ratio ◽  
Maule Earthquake ◽  
Attenuation Models ◽  
First Time

<p>Based upon SG (superconducting gravimeter) records, the autoregressive method proposed by Chao and Gilbert [1980] is used to determine the frequencies of the singlets of seven spheroidal modes (<sub>0</sub>S<sub>2</sub>, <sub>2</sub>S<sub>1</sub>, <sub>0</sub>S<sub>3</sub>, <sub>0</sub>S<sub>4</sub>, <sub>1</sub>S<sub>2</sub>, <sub>0</sub>S<sub>0</sub>, and <sub>3</sub>S<sub>1</sub>) and the degenerate frequencies of three toroidal modes (<sub>0</sub>T<sub>2</sub>, <sub>0</sub>T<sub>3</sub>, and <sub>0</sub>T<sub>4</sub>) below 1 mHz after two recent huge earthquakes, the 2010 Mw8.8 Maule earthquake and the 2011 Mw9.1 Tohoku earthquake. The corresponding quality factor <em>Q</em>s are also determined for those modes, of which the <em>Q</em>s of the five singlets of <sub>1</sub>S<sub>2</sub> and the five singlets (<em>m</em>=0, <em>m</em>=±2, and <em>m</em>=±3) of <sub>0</sub>S<sub>4</sub> are estimated for the first time using the SG observations. The singlet <em>m</em>=0 of <sub>3</sub>S<sub>1</sub> is clearly observed from the power spectra of the SG time series without using other special spectral analysis methods or special time series from pole station records. In addition, the splitting width ratio <em>R</em> of <sub>3</sub>S<sub>1</sub> is 0.99, and consequently we conclude that <sub>3</sub>S<sub>1</sub> is normally split. The frequencies and <em>Q</em>s of the modes below 1mHz may contribute to refining the 3D density and attenuation models of the Earth.</p>

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