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  • Dictionary:Array (seismic)
    ...nse of nine geophones equally spaced 5.5 m apart. The solid curves are for harmonic (steady-state) waves, the dashed curves for a transient with a bell-shaped
    3 KB (430 words) - 18:19, 6 June 2020
  • Dictionary:Backus averaging
    ...d to upscale sonic-log data for synthetic seismogram manufacture. Involves harmonic averaging to find the anisotropic elastic parameters that characterize seis
    629 bytes (76 words) - 23:24, 3 October 2020
  • Dictionary:Distortion
    ...sub>''n''</sub> is the rms voltage of the ''n''th harmonic, the <b>percent harmonic distortion</b> is
    2 KB (254 words) - 21:04, 3 April 2017
  • Dictionary:Distortion point
    The input amplitude for which the distortion-generated third harmonic becomes a certain percentage, generally 3% but sometimes 1%. For smaller in
    304 bytes (37 words) - 21:04, 3 April 2017
  • Dictionary:Distortion tail
    ...surface sources produces spurious correlations, especially for the second harmonic (which may be very large). This produces a distortion tail that follows the
    411 bytes (55 words) - 21:05, 3 April 2017
  • Dictionary:Eikonal equation
    .... An equation derived from the wave equation through the substitution of a harmonic wave trial solution into the wave equation. In one form of the eikonal equa
    2 KB (365 words) - 19:12, 8 April 2019
  • Dictionary:Fresnel zone
    ...a plane reflector mainly effective in generating a reflection since, for a harmonic wave, the effects of successive zones generally cancel each other. A nomogr
    1 KB (207 words) - 18:05, 14 November 2017
  • Dictionary:Fundamental
    The lowest frequency of a periodic function. Also called the <b>first harmonic</b>.
    204 bytes (26 words) - 14:48, 2 March 2017
  • Dictionary:Ghost
    ...tionary:correlation_ghost|''correlation ghost'']] (q.v.) that results from harmonic distortion when using vibroseis.
    880 bytes (134 words) - 16:14, 13 June 2018
  • Dictionary:Harmonic
    {{#category_index:H|harmonic}} ...frequency that is a simple multiple of a fundamental frequency. The third harmonic, for example, has a frequency three times that of the fundamental. <b>2</b>
    478 bytes (72 words) - 17:07, 22 July 2017
  • Dictionary:Harmonic analysis
    {{#category_index:H|harmonic analysis}}
    333 bytes (42 words) - 17:10, 22 July 2017
  • Dictionary:Harmonic average
    {{#category_index:H|harmonic average}} The reciprocal of a harmonic average is given by the sum of the weighted reciprocals of the elements to
    521 bytes (75 words) - 17:12, 22 July 2017
  • Dictionary:Harmonic distortion
    {{#category_index:H|harmonic distortion}}
    262 bytes (29 words) - 18:08, 22 July 2017
  • Dictionary:Harmonic function
    {{#category_index:H|harmonic function}}
    255 bytes (30 words) - 18:10, 22 July 2017
  • Dictionary:Harmonic mean
    {{#category_index:H|harmonic mean}}
    175 bytes (19 words) - 18:15, 22 July 2017
  • Dictionary:Helmholtz equation
    The space-dependent form of the wave equation for a wave that is harmonic in time:
    2 KB (271 words) - 15:26, 5 January 2021
  • Dictionary:Logarithmic decrement
    ...ral logarithm of the ratio of the amplitudes of two successive cycles of a harmonic event. Where the amplitude decay is because of absorption, the logarithmic
    366 bytes (51 words) - 17:58, 13 April 2019
  • Dictionary:Modulation
    ...essed as a percentage of the amount which will produce a certain amount of harmonic distortion. <b>3</b>. Sometimes used to imply the number of bits used to re
    711 bytes (102 words) - 14:42, 13 July 2018
  • Dictionary:Noise (seismic)
    ...des microseisms, source-generated noise, multiples, tape-modulation noise, harmonic distortion, etc. Sometimes divided into coherent noise (including nonreflec
    585 bytes (72 words) - 07:32, 31 October 2017
  • Dictionary:Normal magnetic field
    ...es of exploration interest. Ordinarily computed from a low-order spherical harmonic expansion constrained by satellite measurements. The normal field of the Ea
    797 bytes (110 words) - 15:22, 11 December 2017
  • Dictionary:Periodic function
    A function that repeats after successive equal intervals of time; a <b>harmonic function</b>.
    220 bytes (28 words) - 14:56, 7 March 2018
  • Dictionary:Phase curve
    ...a plot of the phase relationship of the component sinusoids determined by harmonic analysis graphed versus frequency.
    274 bytes (38 words) - 18:22, 12 March 2018
  • Dictionary:Q(Quality)
    ...e of amplitude with distance because of absorption; the amplitude of plane harmonic waves is often written as
    3 KB (497 words) - 11:00, 29 November 2020
  • Dictionary:Spherical harmonic
    {{#category_index:S|spherical harmonic}}
    218 bytes (24 words) - 09:52, 6 September 2017
  • Dictionary:Wave
    ...'']]. Wave motion at a point is often described mathematically in terms of harmonic components:
    3 KB (537 words) - 09:42, 30 November 2017
  • Dictionary:Fig D-15
    ...nse of nine geophones equally spaced 5.5 m apart. The solid curves are for harmonic (steady-state) waves, the dashed curves for a transient with a bell-shaped
    845 bytes (128 words) - 00:03, 14 February 2020
  • Yu Zhang
    ...e x-k extrapolator, de-aliasing interpolation, delayed-shot migration, and harmonic-shot migration.
    8 KB (1,270 words) - 12:41, 20 June 2016
  • Gilles Hennenfent
    harmonic analysis (read wavelets) was worthwhile. Gilles
    5 KB (814 words) - 19:47, 14 February 2014
  • Mostafa Naghizadeh
    analysis, signal estimation theory, and modern concepts in harmonic analysis to develop robust and
    5 KB (719 words) - 14:56, 17 October 2016
  • James Martin
    and vibroseis. He published on vibrator efficiency, harmonic
    4 KB (646 words) - 11:12, 18 October 2016
  • Justus Rozemond
    ...erate in 1998. A few years later, most contractors had developed their own harmonic distortion-reduction algorithms, making Justus’ vision of a large number
    5 KB (717 words) - 15:25, 17 October 2016
  • Introduction to compressed sensing
    ...c data]]. In our simple example, let us assume that we know the signal has harmonic content and is therefore sparse in the Fourier domain.
    9 KB (1,356 words) - 16:40, 16 February 2016
  • Dictionary:Fig D-15/en
    ...nse of nine geophones equally spaced 5.5 m apart. The solid curves are for harmonic (steady-state) waves, the dashed curves for a transient with a bell-shaped
    799 bytes (122 words) - 22:49, 16 March 2017
  • Dictionary:Distortion/en
    ...sub>''n''</sub> is the rms voltage of the ''n''th harmonic, the <b>percent harmonic distortion</b> is
    1 KB (236 words) - 21:05, 3 April 2017
  • Dictionary:Distortion point/en
    The input amplitude for which the distortion-generated third harmonic becomes a certain percentage, generally 3% but sometimes 1%. For smaller in
    245 bytes (31 words) - 21:05, 3 April 2017
  • Dictionary:Distortion tail/en
    ...surface sources produces spurious correlations, especially for the second harmonic (which may be very large). This produces a distortion tail that follows the
    352 bytes (49 words) - 21:07, 3 April 2017
  • Dictionary:Q(Quality)/en
    ...e of amplitude with distance because of absorption; the amplitude of plane harmonic waves is often written as
    3 KB (457 words) - 11:01, 29 November 2020
  • Dictionary:Harmonic/en
    {{#category_index:H|harmonic}} ...frequency that is a simple multiple of a fundamental frequency. The third harmonic, for example, has a frequency three times that of the fundamental. <b>2</b>
    419 bytes (66 words) - 17:08, 22 July 2017
  • Dictionary:Harmonic analysis/en
    {{#category_index:H|harmonic analysis}}
    274 bytes (36 words) - 17:10, 22 July 2017
  • Dictionary:Harmonic average/en
    {{#category_index:H|harmonic average}} The reciprocal of a harmonic average is given by the sum of the weighted reciprocals of the elements to
    404 bytes (61 words) - 17:12, 22 July 2017
  • Dictionary:Harmonic distortion/en
    {{#category_index:H|harmonic distortion}}
    203 bytes (23 words) - 18:08, 22 July 2017
  • Dictionary:Harmonic function/en
    {{#category_index:H|harmonic function}}
    196 bytes (24 words) - 18:11, 22 July 2017
  • Dictionary:Harmonic mean/en
    {{#category_index:H|harmonic mean}}
    116 bytes (13 words) - 18:15, 22 July 2017
  • Dictionary:Spherical harmonic/en
    {{#category_index:S|spherical harmonic}}
    133 bytes (16 words) - 09:53, 6 September 2017
  • Dictionary:Spherical harmonic/es
    {{#category_index:S|spherical harmonic}}
    133 bytes (19 words) - 09:55, 6 September 2017
  • Dictionary:Noise (seismic)/en
    ...des microseisms, source-generated noise, multiples, tape-modulation noise, harmonic distortion, etc. Sometimes divided into coherent noise (including nonreflec
    526 bytes (66 words) - 07:32, 31 October 2017
  • Dictionary:Fresnel zone/en
    ...a plane reflector mainly effective in generating a reflection since, for a harmonic wave, the effects of successive zones generally cancel each other. A nomogr
    1 KB (201 words) - 11:13, 21 November 2017
  • Dictionary:Fundamental/en
    The lowest frequency of a periodic function. Also called the <b>first harmonic</b>.
    145 bytes (20 words) - 14:49, 2 March 2017
  • Dictionary:Helmholtz equation/en
    The space-dependent form of the wave equation for a wave that is harmonic in time:
    336 bytes (47 words) - 23:25, 23 January 2017
  • Dictionary:Backus averaging/en
    ...d to upscale sonic-log data for synthetic seismogram manufacture. Involves harmonic averaging. <b>2</b>. Calculating the anisotropic elastic parameters that ch
    360 bytes (44 words) - 08:25, 24 January 2017

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