Marine Seismic Display Enhancement Program. Volume I. Results.
NAVAL OCEAN RESEARCH AND DEVELOPMENT ACTIVITY NSTL STATION MS
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The quality of marine seismic profiling data governs the geophysicists ability to interpret the geological character of the ocean sub-bottom structure. This report presents the results of a development program in the areas of data acquisition, processing and display to enhance single channel deep water marine seismic profiling data. A digital data acquisition system with a multi-channel 16 analog input capability has been developed. The system has a sampling rate up to 10 kHz with 72 dB dynamic range. Basic processing software has been implemented for the UNIVAC 1108 or CDC 6600 computers to enhance data quality through signal-to-noise improvement and increased resolution. The software includes time domain filtering, frequency domain filtering, Wiener filtering, spectral analysis and trace stacking. Wiggle traces can be generated through a CalComp or Zeta software routine. A display playback system for the processed data with multi-format capability has been developed. The system generates outputs for the conventional line scan recorder, an X-Y plotter and a fiber optic recorder. Display formats include intensity modulated line scan, wiggle traces and variable area half-wave rectified wiggle traces. Playback rates up to 40 times real time acquisition are possible. Selected sections of the field data are, also, presented in a color format. Recommended field procedures for acquisition of single channel marine seismic profiling data optimized for subsequent data processing are presented.
- Physical and Dynamic Oceanography
- Computer Programming and Software