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(11)    Patent No :    AP 1945   
(21)    Application No :    AP/P/2004/003181   
(22)    Filing Date :    20.06.2003   
(24)    Date of Grant &    03.02.2009   
           
(45)    Publication :

(30)  Priority Data       
(33) Country    (31) Number    (32) Date
AU    PS 3068    20.06.2002

(84)    Designated State

BW    GM    GH    KE    LS    MW  MZ   NA   SL
SD    SZ    T Z    UG    ZM    ZW
 
(73) Applicant(s)

WMC RESOURCES LIMITED, 180 Lonsdale Street,

Melbourne, Victoria 3000,
Australia


(72) Inventors

DUNCAN Andrew Charles, Australia

GOLDEN Howard, Australia

TRESIDDER John Douglas, Australia

et al

(74)    Representative

B. W. KAHARI LEGAL PRACTITIONERS
 

(51)  International  Classification   G01V 1/24 (2007.01)    G01V 11/00 (2007.01)



(54)    Title

A data aquisition unit, system and method for geophysical data

(57)    Abstract

A data acquisition system for gathering geophysical data, a corresponding method, and a data acquisition unit for use with the system and method are disclosed. The system (10) comprises a plurality of data acquisition units (14) for gathering geophysical data, each data acquisition unit (14) being connectable to at least one sensor (15) and being arranged, during use, to gather geophysical data from the at least one sensor (15). Each data acquisition unit (14) comprises time referencing means (48) arranged to generate time reference data usable to control the time at which samples of geophysical data are taken. The system (10) further comprises means for calculating spatial derivatives between samples associated with adjacent sensors (15) connected during use to the data acquisition units (I4),

(56)    Documents Cited :    EP 967494 A   WO 02 073237 A

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