Index of contributors VI
The International Association of Geodesy VII
Telegrams VIII
Resolutions adopted by the Permanent Commission for Earth Tides IX
Opening Session (Chairman: J. Kakkuri) 1
Kakkuri, J.: Welcome 3
Groten, E.: Salutation of the I.A.G 5
Hsu, H. T.: Presidential address 7
Melchior, P.: Report of the International Center for Earth Tides for
the period 1985-1989 9
Groten, E.: Geophysical interpretation of tidal data 23
Session I: Tidal observations, methods and instruments (Chairman:
E. Groten) 39
Mentes, G.: Direct digital transducers for tidal measurements 41
Richter, B.: An automatic LTC-system for superconducting gravimeters 49
Van Ruymbeke, M.: A new feedback system for instruments equipped with
a capacitive transducer 51
Van Ruymbeke, M., Kääriäinen, J., Hennaux, S., Van Wallegem, L. &
d'Oreye, N.: Long baseline watertubes 61
Kääriäinen, J. & Ruotsalainen, H.: Tilt measurements in the
underground laboratory Lohia 2, Finland, in 1977-1989 71
Van Ruymbeke, M., Westerhaus, H. & Fernandez, J.: Temperature
measurements 73
Fernandez, J., Vieira, R., Lambas, F. & Toro, C.: Data aquisition
systems in the "Valle de los Cairos" and "Cueva de los Verdes"
stations 85
Van Ruymbeke, M.: Calibration platforms for gravimeters 95
Session II: Tidal observations, methods and instruments (Chairman:
M. Bonatz) 101
Rydelek, P. A., Zürn, W., Sacks, I. S. & Linde, A.: Tidal measurements
with a Sacks-Evertson korehole strainmeter at Mammoth Lakes,
California 103
Stojanov, T. & Elenkov, S.: Possibility for research on earth tides in
the geophysical observatory "Plovdiv", Bulgaria 113
Xin, Cai Wei, Van Ruymbeke, M., Shilin, Tang, Ducarme, B., Weimin, Du
& Flick, J.: Cooperative projects in geodynamical instrumentation
between the State Seismological Bureau (China) and the Royal
Observatory of Belgium 119
Session III: Tidal observations, results (Chairman: H. T. Hsu) 131
Alms, R., Jahr, T., Jentzsch, G., Melzer, J., Weise, A., Asch, G.,
Kiviniemi, A., Kääriäinen, J. & Ruotsalainen, H.: 3-component broad
band tidal recordings in Metsähovi/Finland 133
Baker, T. F., Edge, R. J. & Jeffries, G.: European tidal gravity 147
Ducarme, B. & Van Ruymbeke, M.: On tidal parameters at Brussels
fundamental station 157
De Mayer, F. & Ducarme, B.: Nontidal gravity changes observed with a
superconducting gravimeter 167
Session IV: Tidal observations, results (Chairman: J. Kuo) 185
Hsu, H. T., Tao, G. Q., Song, X. L., Baker, T. F., Edge, R.J. &
Jeffries, G.: Gravity tidal datum at Wuchang of China 187
Melchior, P., Flick, J., Ducarme, B., Van Ruymbeke, M., De Mayer, F. &
Rasson, J.: Earth tides results obtained with gravimeters, clinometers
and strainmeters in Belgium and in Grand Duchy of Luxemburg 197
Rasson, J.: Results of tidal gravity observations with a conical
pendulum 211
Vieira, R., Fernandez, J., Toro, C. & Camacho, A. C.: Structural and
oceanic effects in the gravimetric tides observations in Lanzarote
(Canary Islands) 217
Paesalu, J. & Sildvee, H.: Preliminary results of earth tide
observations with modernized gravity meter GS 11 No.147 (GPE) in
Tallinn in the years 1985-1986 231
Session V: Tidal observations, results (Chairman: G. Jentzsch) 241
Bonatz, M.: A new borehole tiltmeter for multiple application 243
Chojnicki, T.: Modulation of some tidal waves of horizontal
constituents 249
Gerstenecker, C.: The Hughes borehole tiltmeter 257
Session VI: Tide-generating potential development and tidal analysis
methods. Earth tides and rotation of the Earth (Chairman: B. Ducarme)
259
Jentzsch, G.: Working group on "High Precision Tidal Data
Processing" - Report 261
Zongyong, Chen: A j v model for tidal harmonic analysis and prediction
265
Varga, P. & Denis, C.: Tidal friction, earth rotation and related
phenomena 267
Zhang, Yuangchong & Kuo, J. T.: Time-domain earth tides for a rotating
earth 273
Session VII: Ocean tides and interactions of the Earth and the oceans
(Chairman: T. Baker) . 285
Francis, O. & Mazzega, P.: What we can learn about ocean tides from
tide gauge and gravity loading measurements? 287
Vincent, P., Le Provost, C. & Mazzega, P.: Topex/Poseidon opportunity
to get a new generation of ocean tide model 299
Jahr, T., Jentzsch, G., Andersen, N. & Remmer, O.: Ocean tidal loading
on the shelf areas around Denmark 309
Kaczorowski, M.: Seasonal variations of the ocean indirect effects 321
Ruihao, Li, Heping, Sun & Xianhua, Jiang: Investigations of ocean
loading effect on earth tidal observations in the mainland of China
335
Scherneck, H.-G.: Regional ocean tide modelling 345
Qinwen, Xi: The evaluation of the precision of the development of the
tidal generating potential 355
Zahel, W.: Assimilating data into ocean tide models 361
Session VIII: Perturbations. Geophysical interpretation of tidal
observations (Chairman: P. Melchior) 373
Alms, R., Asch, G., Jahr, T., Jentzsch, G., Melzer, J. & Weise, A.:
Tilt measurements near Bla sj0 in Southern Norway 375
Berrino, G., Coppa, U. & Corrado, G.: Tidal field and volcanic
activity in Southern Italy 387
Delcourt-Honorez, M.: Water-levels fluctuations in a borehole at the
Royal Observatory of Belgium: effects on local gravity, earth tidal
and barometric responses 389
Gerstenecker, C.: Application of borehole tiltmeters for engineering
purposes 413
Edge, R.J. & Oldham, M.: The investigation on gravity variations near
a pumped-storage reservoir in North Wales 415
Hinderer, J. & Legros, H.: Gravity perturbations of annual period 425
Melchior, P. & Ducarme, B.: A study of the observed tidal residue
vectors B versus oceanic tidal load vectors L 431
Melchior, P. & Ducarme, B.: Tidal gravity anomalies and tectonics 445
Session IX: Perturbations. Geophysical interpretation of tidal
observations (Chairman: R. Vieira Dlaz) 455
Mäkinen, J. & Tattari? S.: The influence of variation in subsurface
water storage on observed gravity - 457
Camacho, A. G., Vieira, R. & de Toro, C.: Least square prediction
applied to gravimetric tides in Europe 473
Wahr, J. & de Vries, D.: Possible aspherical structure in the core and
its effects on diurnal tidal resonance 491
Xiao, Q. & Hsu, H. T.: The impulse response of a PREM-Zschau Earth 493
Hsu, H. T. & Hua, Zhou: Investigation of the nearly diurnal resonance
of the liquid core 509
Zürn, W. & Rydelek, P. A.: Investigation of the "nearly diurnal free
wobble"-resonance in individual tidal records 521
Session X: Earth models (Chairman: J. Wahr) 531
Dehant, V., Ducarme, B., Jentzsch, G., Kääriäinen, J., Li, G. Y.,
Molodensky, S. M., Okubo, S., Wahr, J., Qin-Wen, Xi & Zschau, J.:
Report of the working group on Theoretical Tidal Model 533
Hinderer, J., Zürn, W. & Legros, H.: Interpretation of the strength of
the "nearly diurnal free wobble"-resonance from stacked gravity tide
observations 549
Legros, H. & Hinderer, J.: On some perturbations of diurnal tidal
waves and related notations 557
Pagiatakis, S. D.: The effect of anisotropy in the Earth's mantle on
body and ocean load tide 565
Sato, T.: Fluid core resonance measured by quartz tube extensometers
at the Esashi Earth Tides station 573
Savin, I., Schwahn, W. & Rukavishnikova, T. A.: Narrow band spectrum
analysis of gravity time series comparison of Bad Homburg, Brussels
and Potsdam observations 583
Li, G.-Y. & Hsu, H. T.: The tidal modelling theory with a lateral
inhomogeneous, inelastic mantle 601
Additional papers: 613
Katona, G.: Use of the tidal analysis in hydrogeology 615
Dittfeld, H.-J.: Tidal results of the gravimetric observatory Potsdam
623 Elstner, C. & Schwahn, W.: Some remarks on the S3 gravity and air
pressure variations 637
Schwahn, W., Elstner, C. & DittLeld, H.-J.: Third degree effects
producing temporal variations of the gravimetric tidal parameters for
the N2 and L2 wave groups 645
Simon, D., Kaczorowski, M. & Fleischer, W.: On strain and tilt
movements of the Earth's surface induced by atmospheric pressure
variations 655
