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 US06/636,232external-prioritypatent/US4591791A/en
Priority claimed from US06/854,147external-prioritypatent/US4757262A/en
Application filed by Univ TexasfiledCriticalUniv Texas
Priority to IN200/MAS/90ApriorityCriticalpatent/IN171957B/en
Priority to IN199/MAS/90Aprioritypatent/IN172128B/en
Publication of IN167451BpublicationCriticalpatent/IN167451B/en
G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
G01V3/087—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices the earth magnetic field being modified by the objects or geological structures