PT65090B - Improvement in system and process of processing of seismicdata - Google Patents

Improvement in system and process of processing of seismicdata

Info

Publication number
PT65090B
PT65090B PT65090A PT6509076A PT65090B PT 65090 B PT65090 B PT 65090B PT 65090 A PT65090 A PT 65090A PT 6509076 A PT6509076 A PT 6509076A PT 65090 B PT65090 B PT 65090B
Authority
PT
Portugal
Prior art keywords
seismicdata
improvement
processing
Prior art date
Application number
PT65090A
Other languages
English (en)
Portuguese (pt)
Other versions
PT65090A (en
Original Assignee
Western Geophysical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/576,943 external-priority patent/US3996553A/en
Priority claimed from US05/664,618 external-priority patent/US4092629A/en
Priority claimed from US05/665,151 external-priority patent/US4023140A/en
Application filed by Western Geophysical Co filed Critical Western Geophysical Co
Publication of PT65090A publication Critical patent/PT65090A/pt
Publication of PT65090B publication Critical patent/PT65090B/pt

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/3026—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being discontinuously variable, e.g. controlled by switching
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/22—Transmitting seismic signals to recording or processing apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/24—Recording seismic data
    • G01V1/245—Amplitude control for seismic recording
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
    • H03H19/002—N-path filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
    • H03H19/008—Networks using time-varying elements, e.g. N-path filters with variable switch closing time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/04—Distributors combined with modulators or demodulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/10—Arrangements for reducing cross-talk between channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Geophysics (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Oceanography (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Multimedia (AREA)
  • Geophysics And Detection Of Objects (AREA)
PT65090A 1975-05-12 1976-05-12 Improvement in system and process of processing of seismicdata PT65090B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US05/576,943 US3996553A (en) 1975-05-12 1975-05-12 Seismic data telemetering system
US05/664,618 US4092629A (en) 1976-03-08 1976-03-08 Decentralized seismic data processing system
US05/665,151 US4023140A (en) 1975-05-12 1976-03-08 Seismic data telemetering system

Publications (2)

Publication Number Publication Date
PT65090A PT65090A (en) 1976-06-01
PT65090B true PT65090B (en) 1977-09-14

Family

ID=27416254

Family Applications (1)

Application Number Title Priority Date Filing Date
PT65090A PT65090B (en) 1975-05-12 1976-05-12 Improvement in system and process of processing of seismicdata

Country Status (8)

Country Link
BR (1) BR7602919A (hr)
DK (1) DK207576A (hr)
FR (1) FR2377045A1 (hr)
IT (1) IT1046697B (hr)
NL (1) NL181956C (hr)
NO (1) NO145318C (hr)
PT (1) PT65090B (hr)
SE (1) SE409909B (hr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538194B1 (fr) * 1982-12-16 1985-10-11 Inst Francais Du Petrole Methode pour la commande a distance d'appareils d'acquisition de signaux au moyen d'une voie de transmission a bande passante etroite et dispositif pour sa mise en oeuvre

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2036151A5 (hr) * 1969-03-05 1970-12-24 Sercel Rech Const Elect
GB1465306A (en) * 1973-11-05 1977-02-23 Globe Universal Sciences Transmission line seismic communication system

Also Published As

Publication number Publication date
PT65090A (en) 1976-06-01
NL181956C (nl) 1987-12-01
BR7602919A (pt) 1976-11-23
NO145318C (no) 1982-02-24
SE409909B (sv) 1979-09-10
NO145318B (no) 1981-11-16
IT1046697B (it) 1980-07-31
FR2377045B1 (hr) 1983-01-07
NL7604732A (nl) 1976-11-16
FR2377045A1 (fr) 1978-08-04
DK207576A (da) 1976-11-13
SE7604977L (sv) 1976-11-13
NL181956B (nl) 1987-07-01
NO761572L (hr) 1976-11-15

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