Blar i NTNU Open på forfatter "Westerdahl, Harald"
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Estimation of Water Velocity and Tidal Changes Between 4D Seismic Vintages
Teien, Ole Martin (Master thesis, 2017)Between the acquisitions of the vintages used in 4D seismic, both the seismic water velocity and the tidal level can change. These changes will create time shifts that reduce the 4D seismic's sensitivity to real changes ... -
Frequency-depth-dependent spherical reflection response from the sea surface - a transmission experiment
Wehner, Daniel; Landrø, Martin; Amundsen, Lasse; Westerdahl, Harald (Journal article; Peer reviewed, 2018)In academia and the industry, there is an increasing interest in generating and recording low seismic frequencies, which lead to better data quality, deeper signal penetration and can be important for full-waveform inversion. ...