Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Vehicle fender
Dual source mass spectrometry system
Therapeutic vitamin D sun-protecting formulations and methods for their use
Categorization of design rule errors
Dual work function recessed access device and methods of forming
Display module
Aromatic amine derivative, organic electroluminescent element employing the same, and process for producing aromatic amine derivative
  Randomly Featured Patents
Seat and back rest for a chair
Biosensor with peroxidase enzyme
Intervertebral disk implant
Concentration control in an absorption chiller
Michelson interferometer for producing optical path differences by rotating corner cube retroreflectors
Thin film semiconductor device, polycrystalline semiconductor thin film production and process and production apparatus
Antiviral poly-and oligonucleotides
Magnetic bubble read/write head
Cells for the production of recombinant adenoviruses
2"-deoxy hygromycin derivatives