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  • 1
    Electronic Resource
    Electronic Resource
    Dynamic magnification of the galitzin seismograph excited by shock motion of the ground (1956)
    Springer
    Czechoslovak journal of physics 6 (1956), S. 22-27 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A reduced dynamic magnification of the first maximum is derived for the seismograph of B. B. Galitzin during shock motion of the ground represented by the expressionAt 3e−λ t
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01698185
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  • 2
    Electronic Resource
    Electronic Resource
    Experimenteller Nachweis äusserst schwacher tektonischer Erschütterungen im Gebiet von Komárno (1957)
    Springer
    Czechoslovak journal of physics 7 (1957), S. 106-108 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01688725
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  • 3
    Electronic Resource
    Electronic Resource
    Vertical electkodynamic seismograph for observing tectonic microtremors (1957)
    Springer
    Czechoslovak journal of physics 7 (1957), S. 112-113 
    Details
    ISSN: 1572-9486
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01688728
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of vibrations on the accuracy of measurements with a CG-2 gravimeter (1974)
    Springer
    Studia geophysica et geodaetica 18 (1974), S. 199-204 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The effect of vibrations on the accuracy of measurements with aCG-2 gravimeter was investigated on a vibrating table with a vertical, harmonic motion of an amplitude range of 0.1–4 µ and frequency range of 10–100Hz (Tabs 1, 2). The error in determining the gravity is a non-linear function of the amplitude and frequency (Figs 1–4), and within the range of motion of the table amounts to as much as tens of milligals. A permanent seismic noise of average intensity does not generate an error in the gravimeter reading. The effect of wind and close sources of vibrations can only be evaluated by means of concurrent seismic observations of ground movement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01614982
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  • 5
    Electronic Resource
    Electronic Resource
    Magnification control of electromagnetic seismographs with standard a I–IV characteristics (1975)
    Springer
    Studia geophysica et geodaetica 19 (1975), S. 245-260 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The values of the amplitude response (Tab. 1) and the calibration constants for the step of acceleration (Tab. 5) have been derived for periods of 0.1, 1 and 2 s and for 4 standard amplitude responses of short-period electromagnetic seismographs, the partial constants of which are defined by polynomials in dependence on the coupling coefficient. With the help of the coefficients given in Tabs 2–4 and 6–8 these standard values may be easily corrected, provided the deviations of the partial constants of the seismograph from the standard constants are smaller than 10%. The maximum errors of the amplitude response and of the calibration constant will not exceed 2.5 and 1.5%, respectively. The tabulated coefficients may also be used to compute the standard and maximum errors of the magnification. The comparison of the magnification values and of their errors, determined by two methods, allows one to disclose possible systematic errors in the calibration and to test the reliability of the seismograph function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01614254
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  • 6
    Electronic Resource
    Electronic Resource
    Seismic noise at the international gravity point in Prague-Ruzyně (Czechoslovakia) (1975)
    Springer
    Studia geophysica et geodaetica 19 (1975), S. 383-388 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The vertical component of ground displacement was measured at the Prague - Ruzyně International Gravity Point in the frequency range of 1–300 Hz. The permanent noise, the vibrations caused by the observers during gravimetric observations and by the wind, as well as those due to normal operations at the airport, display maximum peak-to-peak amplitudes of 0.06 µm in the frequency range of 1–50 Hz; with a CG-2 gravimeter this is not detrimental to the accuracy of the observations. The taxiing of turbo-jet and jet aircraft and engine tests of aircraft generate vibrations in frequency ranges of 75–90 and 190–270 Hz. Their amplitudes, according to the results of laboratory tests published for various types of gravity meters (CG-2, GAK-PT, GVP-3, KVG), are of magnitudes which generate errors in tenths of mgl.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01615813
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  • 7
    Electronic Resource
    Electronic Resource
    The constants of equivalent systems without feedback for computing the responses of electromagnetic seismographs with several galvanometers (1976)
    Springer
    Studia geophysica et geodaetica 20 (1976), S. 133-148 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The amplitude and phase responses of electromagnetic seismographs with an arbitrary number of galvanometers, used to increase the dynamic range of the seismograph or to filter perturbing oscillations, are derived. The fundamental parameters of the system, i.e. the partial periods and the partial constants of damping of the seismometer and of the individual galvanometers, together with the coupling terms, are replaced by other constants. These enable the responses of each channel to be computed with the aid of a combination of elementary responses of the systems of the set with zero couplings between the galvanometers and a zero effect of the motion of the galvanometers on the motion of the seismometer. The elementary responses are defined by 2 types of substitute constants: equivalent constants, determined by the roots of the characteristic equation, or by the partial periods, and reduced damping constants. The possibilities of analysing a system with equivalent constants are demonstrated on the case of a seismograph with 2 galvanometers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01626047
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  • 8
    Electronic Resource
    Electronic Resource
    The effect of the magnetic field on the accuracy of measurements with Worden and Sharpe gravity meters (1976)
    Springer
    Studia geophysica et geodaetica 20 (1976), S. 338-345 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary The effect of an additional homogeneous magnetic field with an intensity of 0–4.5 Oe on the Worden quartz gravity meter No. 961 and on Sharpe quartz gravity meters Nos 173 and 174 was tested. Whereas no effect was observed with the Worden gravity meter, the magnetic field had a measurable effect on both the Sharpe gravity meters. The largest deviation of the reading beam is caused by the horizontal component of the magnetic field which acts in the plane of oscillation of the gravity-meter arm. The Sharpe gravity meter No. 173 is considerably sensitive; a field of 0.2 Oe intensity, corresponding to the magnitude of the horizontal component of the geomagnetic field in mid-latitudes, causes an error in the measurement of gravity of as much as 0.08 mGal. With a view to the different behaviours of the individual quartz gravity meters of the same type in a magnetic field, it should prove expedient to carry out check measurements with all gravity meters and, with regard to the sensitivity of the gravity meter to the magnetic field and the required accuracy of the gravity determination, take into account this perturbing factor in field measurements, as well as laboratory tests of gravity meters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01617646
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  • 9
    Electronic Resource
    Electronic Resource
    Estimate of the effect of vibrations on quartz gravity meters (1978)
    Springer
    Studia geophysica et geodaetica 22 (1978), S. 336-347 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary Relations for computing the minimum amplitudes of ground vibrations which generate oscillations of the gravity meter reading beam at the limit of the resolution of the optical system, have been derived. The minimum amplitudes in the ground displacement period range of0.1 to10 s, for the assumed values of the fundamental parameters of quartz gravity meters (i.e. the periods and damping constants of the pendulum and the mechanico-optical magnification of the pendulum deflections), range from tenths of a micrometre to units of micrometres. Larger displacement amplitudes, due to, e.g., earthquakes and traffic, disrupt gravity measurements.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02179276
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  • 10
    Electronic Resource
    Electronic Resource
    Sensitivity of the Sharpe and Worden gravity meters to vertical motion (1979)
    Springer
    Studia geophysica et geodaetica 23 (1979), S. 122-130 
    Details
    ISSN: 1573-1626
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences , Physics
    Notes: Summary Using the least-squares method the constants of both gravity meters — seismometers — were derived from the amplitude responses, observed under vertical motion on a vibrating table in the 0.3–30 s range. The values of the seismogram amplitudes, above which seismic waves cause an observable displacement of the gravity meter reading beam, were determined for the SKD and Press-Ewing station seismographs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01628837
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