Resources Contact Us Home
Method for cascading sweeps for a seismic vibrator

Image Number 2 for United States Patent #5410517.

A method for cascading or linking seismic vibrator sweeps to form a cascaded sweep sequence. According to the method, a first cascaded sweep sequence is generated containing N sweep segments linked end-to-end. The N sweep segments are substantially identical, except that the initial phase angle of each sweep segment within the sweep sequence is progressively rotated by a constant phase increment of about 360/N degrees. A second cascaded sweep sequence is generated consisting of (i) N consecutive sweep segments linked end-to-end which correspond to said first cascaded sweep sequence and (ii) an additional sweep segment linked to the N consecutive sweep segments which is positioned and phased so as to substantially suppress harmonic ghosts during correlation. One of these cascaded sweep sequences is used for the vibrator sweep sequence and the other is used for the correlation reference sequence. Any type of sweeps may be cascaded or linked according to the method, and any amount of padding (listen time) may be inserted between the individual sweep segments.

  Recently Added Patents
Composition comprising a mixture of dextro- and levo-amphetamines complexed with ion-exchange resin particles to form drug resin particles
Method and system for establishing enhanced key when terminal moves to enhanced universal terminal radio access network (UTRAN)
Restore software with aggregated view of content databases
Method for producing SOI substrate and SOI substrate
Information processing apparatus, information processing method, and program
Single-chain variable fragment (scFv) able to recognize and bind CD99 human protein
Light-source control device, light-source control method, image reading device, and image forming apparatus
  Randomly Featured Patents
Apparatus for protecting a fuel system component for an engine
Sanitary insert for drain
Meter prover apparatus and method
System and method for turbine engine anomaly detection
Pressure sensitive adhesive tape with central release liner and its use on a jacket portion of insulation member
Method of positioning of plugs or screens by horizontal drilling
Method of fabricating a magnetic write transducer
Permeable material compacting method
Methods and apparatus for hiding data in halftone images
Radio frequency identification device with movable antenna