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RAMBØLL started development of a new seismic land streamer in year 2000. They are now using their third generation of streamer and they have acquired more than 200 kilometers of shallow high-resolution seismic data during the last 2 years.
RAMBØLL can choose from a selection of several streamers with different geophone spacings, which can be combined to build an acquisition spread containing 30 to 102 channels. The streamer sections are combined from job to job to optimize the spread to the target.
RAMBØLL's streamers use conventional p-wave geophones. Data are recorded on a 64 channel StrataVisor NZ seismograph combined with two 24-channel Geode recording modules. A 3500 kg Minivib made by Industrial Vehicles provides high frequency source energy up to 550Hz.
Data acquisition has been executed mainly on roads ranging from freeways to dirt roads - some in very bad shape with a soft sandy surface. RAMBOLL does not employ expensive gimbaled geophones, relying instead on 'sledged' which keep the geophones in the desired orientation. The sledges have sharp edges, which cut a small trench into unpaved roads to insure good coupling.
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