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When you use a mono-channel (MC) streamer (composed by an array of hydrophones), the acquisition geometry in boomer surveys is foundamental in shallow water (depth minus MC lenght)! After several tests I found that if you use a the MC streamer in transverse mode (source and MC parallel) you can keep the MC advantages (increment signal/noise). In fact the conventional inline longitudinal deployment of source and MC streamer leads to a strong phase difference along the hydrophone array for nonvertical arrivals and the summed output is attenuated as a result. In transverse configuration, the variation in phase along the array is smaller. The summed output improves because pairs of hydrophones with equivalent absolute offset are stacked in phase as a result of the symmetric configuration.

Details in:
Baradello L., Carcione J.M Optimal seismic-data acquisition in very shallow waters: Surveys in the Venice lagoon doi: 10.1190/​1.2976117 Geophysics, v. 73 no. 6 p. Q59-Q63



Note: All these seismic data collected and processed by luca baradello in OGS

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last modified: 8 06 2012