Boots – shoes – and leggings
324338, G01V 308, G01V 318
A method for imaging with low frequency electromagnetic fields, and for interpreting the electromagnetic data using ray tomography, in order to determine the earth conductivity with high accuracy and resolution. The imaging method includes the steps of placing one or more transmitters, at various positions in a plurality of transmitter holes, and placing a plurality of receivers in a plurality of receiver holes. The transmitters generate electromagnetic signals which diffuse through a medium, such as earth, toward the receivers. The measured diffusion field data H is then transformed into wavefield data U. The traveltimes corresponding to the wavefield data U, are then obtained, by charting the wavefield data U, using a different regularization parameter .alpha. for each transform. The desired property of the medium, such as conductivity, is then derived from the velocity, which in turn is constructed from the wavefield data U using ray tomography.
patent: 2276974 (1942-03-01), Howard
patent: 4742305 (1988-05-01), Stolarczyk
patent: 4755944 (1988-07-01), Glass
patent: 4875015 (1989-10-01), Ward
patent: 4901023 (1990-02-01), Vail, III
patent: 5068917 (1991-11-01), Stolarczykz
Ki Ha Lee and Gan Quan Xie, "A new approach to imaging with low-frequency electromagnetic fields", Geophysics, vol. 58, No. 6 (Jun. 1993), pp. 780-796.
Ki Ha Lee, Guimin Liu, and H. F. Morrison, "A new approach to modeling the electromagnetic response of conductive media", Geophysics, vol. 54, No. 9 (Sep. 1989), pp. 1180-1192.
V. V. Filatov "Construction of focusing transformation of transient electromagnetic fields", Soviet Geology and Geophysics, vol. 25, No. 5, pp. 89-95 (1984).
G. A. Isaev and V. V. Filatov, "Physicomathematical principles of visualization of nonstationary electromagnetic fields", Soviet Geology and Geophysics, vol. 22, No. 6, pp. 89-95 (1981).
M. Lavrent'ev, V. G. Romanov and S. P. Shishatski, "Ill-posed problems of mathematical physics and analysis", Nauka, vol. 64, pp. 250-252 (1980).
K. H. Lee, "A New approach to interpreting electromagnetic-sounding data", Lawrence Berkeley Laboratory, University of California, Annual Report 1988, Aug. 1989, pp. 24-27.
Lee Ki H.
Xie Gan Q.
Martin Paul R.
McElheny Jr. Donald E.
Moss Kathleen S.
The Regents University of California
Method for imaging with low frequency electromagnetic fields does not yet have a rating. At this time, there are no reviews or comments for this patent.If you have personal experience with Method for imaging with low frequency electromagnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for imaging with low frequency electromagnetic fields will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1197424