<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "STRONG MOTION DATA PROCESSING AND RECORDING \nAT UNIVERSITY OF SOUTHERN CALIFORNIA"^^ . "A brief review is presented of the Los Angeles and Vicinity Strong Motion Network operated by \nthe University of Southern California (USC), consisting of 80 stations deployed in 1978-1980, \nand of software developed and used at USC for digitization of accelerograms recorded on film, \nand for routine and specialized data processing of digitized or digitally recorded accelerograms. \nThe currently used digitization system consists of a flatbed scanner, a PC, and the LeAuto \nsoftware. The films are scanned at 600 dpi optical resolution, which is less than the limit of the \nhardware, but was found to be optimal, considering the limitations of the recorders, and benefit \nversus cost. The standard data processing methods used for further processing are a new \ngeneration of the software developed by Trifunac and Lee [1,2]. Baseline correction is \nperformed by high-pass filtering, with cut-off determined for each component separately using a \nstandard noise spectrum so that the recorded signal-to-noise ratio is greater than unity. The high \nfrequency noise is removed by low pass filtering (with ramp 25-27 Hz for film records). In a \nbatch mode of processing, the low frequency cut-off is determined automatically by the program, \nand is later verified by an operator, who can specify the filter manually if necessary. Filtering is \nperformed in the time domain by Ormsby filter (a non-causal filter that does not introduce phase \ndistortion), after appropriate even extension of the record. Digitally recorded accelerograms are \nalso baseline corrected by high pass filtering, as random piecewise baseline offsets are not \nuncommon in digital accelerograms, even for small accelerations, and permanent displacements \ncannot be computed reliably from recorded three components of acceleration alone."^^ . "2004" . . . . . . . . . . . "Vincent W."^^ . "Lee"^^ . "Vincent W. Lee"^^ . . "Maria I."^^ . "Todorovska"^^ . "Maria I. Todorovska"^^ . . "Civil and Environmental Engineering Department University of Southern California Los Angeles, CA 90089-2531"^^ . . . . . "Invited Workshop on Strong-Motion Record Processing, Organized by Consortium for Strong Motion Observation Programs (COSMOS), May 26-27, 2004, Richmond, California"^^ . . . . . "Richmond, California"^^ . . . . . . "STRONG MOTION DATA PROCESSING AND RECORDING \nAT UNIVERSITY OF SOUTHERN CALIFORNIA (Text)"^^ . . . . . "Todorovska_Lee.pdf"^^ . . . "STRONG MOTION DATA PROCESSING AND RECORDING \nAT UNIVERSITY OF SOUTHERN CALIFORNIA (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "STRONG MOTION DATA PROCESSING AND RECORDING \nAT UNIVERSITY OF SOUTHERN CALIFORNIA (Other)"^^ . . . . . . "preview.jpg"^^ . . . "STRONG MOTION DATA PROCESSING AND RECORDING \nAT UNIVERSITY OF SOUTHERN CALIFORNIA (Other)"^^ . . . . . . "medium.jpg"^^ . . . "STRONG MOTION DATA PROCESSING AND RECORDING \nAT UNIVERSITY OF SOUTHERN CALIFORNIA (Other)"^^ . . . . . . "small.jpg"^^ . . . "STRONG MOTION DATA PROCESSING AND RECORDING \nAT UNIVERSITY OF SOUTHERN CALIFORNIA (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #215 \n\nSTRONG MOTION DATA PROCESSING AND RECORDING \nAT UNIVERSITY OF SOUTHERN CALIFORNIA\n\n" . "text/html" . . . "Method and procesing" . .