A SIMPLE METHOD TO RETRIEVE THE COMPLEX EIGENFREQUENCY OF THE EARTHS NEARLY DIURNAL-FREE WOBBLE - APPLICATION TO THE STRASBOURG SUPERCONDUCTING GRAVIMETER DATA

被引:24
作者
FLORSCH, N [1 ]
CHAMBAT, F [1 ]
HINDERER, J [1 ]
LEGROS, H [1 ]
机构
[1] INST PHYS GLOBE STRASBOURG, F-67084 STRASBOURG, FRANCE
关键词
EARTHS ROTATION; EIGENTHEORY; FREE OSCILLATIONS; GRAVITY; TIDES;
D O I
10.1111/j.1365-246X.1994.tb02127.x
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
We have analysed more than four years of data from the Strasbourg superconducting gravimeter to retrieve the period and damping of the nearly diurnal-free wobble (NDFW). The removal of noise spikes is found to be crucial for an accurate determination of tidal-wave amplitudes and phases. A new simple algorithm is derived which allows an analytical solution for the NDFW period and damping using the complex gravimetric factors of three resonant diurnal waves. The results show a huge reduction of the confidence intervals when compared with a previous investigation from a Lacoste Romberg spring meter operated at the same station. Our results are in close agreement with values obtained from two other European superconducting gravimeters. The results are also compared with respect to values inferred from very long baseline interferometry (VLBI) measurements.
引用
收藏
页码:53 / 63
页数:11
相关论文
共 51 条
[1]  
ABOURS S, 1979, 8TH P INT S EARTH TI, P689
[2]  
[Anonymous], B INFOR MAREES TERRE
[3]   NEW COMPUTATIONS OF TIDE-GENERATING POTENTIAL [J].
CARTWRIGHT, DE ;
TAYLER, RJ .
GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1971, 23 (01) :45-+
[4]   CORRECTED TABLES OF TIDAL HARMONICS [J].
CARTWRIGHT, DE ;
EDDEN, AC .
GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1973, 33 (03) :253-264
[5]  
DUCARME B, 1986, 10TH P INT S EARTH T, P113
[6]  
Flather R. A., 1976, Memoires de la Societe Royal des Sciences de Liege. Collection in-8, V10, P141
[7]   PRELIMINARY SPECTRAL-ANALYSIS OF THE RESIDUAL SIGNAL OF A SUPERCONDUCTING GRAVIMETER FOR PERIODS SHORTER THAN ONE DAY [J].
FLORSCH, N ;
HINDERER, J ;
CROSSLEY, DJ ;
LEGROS, H ;
VALETTE, B .
PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 1991, 68 (1-2) :85-96
[8]  
GOODKIND JM, 1983, 9TH P INT S EARTH TI, P569
[9]   GEODESY BY RADIO INTERFEROMETRY - STUDIES OF THE FORCED NUTATIONS OF THE EARTH .2. INTERPRETATION [J].
GWINN, CR ;
HERRING, TA ;
SHAPIRO, II .
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS, 1986, 91 (B5) :4755-4765
[10]   DIURNAL AND SEMIDIURNAL BAROMETRIC OSCILLATIONS, GLOBAL DISTRIBUTION AND ANNUAL VARIATION [J].
HAURWITZ, B ;
COWLEY, AD .
PURE AND APPLIED GEOPHYSICS, 1973, 102 (01) :193-222