Geosub Prospecção Geomática e Ambiente, Lda has been awarded an study in the Port of Viana do Castello including a geophysical survey. Geosub has rented the SIG boomer system, from our rental pool. The quality of the data was important. On a small boat, a pole can serve as an outrigger to keep the streamer from the turbulence of the propeller's wash.
SIG sparker and multi-channel acquisition has been used during the geophysical campaign CRACK onboard the R/V "Le Téthys II", with international teams of institutes and universities (IUEM/UBO Brest, Ifremer Brest, Univ. of Montpelliers, GEOMAR Kiel, and Univ. Kiel, Univ. Catania, Italia, and Univ. of Malta). The objective of this survey was to identify and quantify the submarine deformation alond the East coast of Sicily, in the coastal region of Etna-Catalane. 600 km of sparker profiles, in water depths of less than 150 m, have led to images of sediments over 100-200 m.
Many sparker users are inclined to boost up the power of the energy source to the maximum possible. This leads to the use of big energy sources, when the penetration obtained is not better, and can even be lesser.
Here between 1000 and 2000 joules no difference in penetration, and even lesser details in the resolution.
Stop increase the power, and start at the lowest possible !
Alex Bastos and his colleagues of the Departamento de Oceanografia, Universidade Federal do Esperito Santo, in Brazil have published the results of their study on the shelf morphology as an indicator of sedimentary regimes : A synthesis from a mixed siliclastic-carbonate shelf on the eastern Brazilian margin.
The seismic data have been acquired with a SIG Pulse S1 boomer system and Meridata multi-frequency acquisition system.
The Pacific Coastal and Marine Science Center of the USGS has been using the SIG mini-sparker for more than 15 years now. During the project on the San Andreas Fault, the sparker has been widely used. "Data from the mini-sparker create an image of the cross section of the fault, revealing the structures of the sediments surrounding it"
The "black box" is now working below the equator line.
Congratulations to the SIG engineers...
"It is just a wonderful machine"
says LAPS, from first trials in Salvador, Bahia, in Brasil.
Meridata has delivered the SIG Pulse S1 boomer system to the Universite Federal de Bahia, and performed training successfully, after the craze of the football world cup !
photos courtesy : Dr Luiz Antonio Pereira de Souza
On board the Ocean Surveyor, the SIG 16.6x4.46 multi-channel streamer is mounted on the drum, and connected through a slip-ring. The good idea is to use a fisherman hydraulic wheel to ease the pulling up, and be gentle to the streamer.
"We will be happy to share more specific information if someone wants to mimic the idea" says Björn Bergman from the Sveriges Geologiska Undersökning (Geological survey of Sweden).
Chesapeake Technology Inc. (CTI), a world leader in real-time sonar acquisition and GIS based processing software for seafloor mapping, is announcing a new 24-bit analog sub-bottom SonarWiz interface (SBP24) for high resolution geophysical surveys. SBP24 provides extremely high resolution 24-bit data at sample rates from 10 to 100kHz per channel for up to 2 channels over a standard USB 2.0 interface. Digitized data is stored in standard SEGY floating point format. The 24-bit data sampling provides greater dynamic range and the increased sampling rates allows for higher resolution of fine scaled sub-bottom reflectors.
Last summer, Geól. Dr. Luiz Antonio Pereira de Souza of the Instituto de Pesquisas Tecnológicas do Estado de São Paulo (IPT), has been conducting a geophysical survey on the Rio Paranà and Rio Paranapanema, downstream of Porto Primavera. LAPS is using an Energos 300 with a boomer plate and streamer SIG 16.8.5, and data acquisition system from Meridata Finland. He says that "despite of the shallow water environment is really not so good environment to make continuous seismic profiling....but yes I got some good profiles."
GMGS (Guangzhou Marine Geological Survey) started to introduce Model 2 Mille Sparker energy source in 2010 from SIG, a French manufacturer, and has benefitted a lot from using it in many field investigation projects such as marine environmental resources survey, engineering geophysical survey and cable route survey, with the accumulated workload up to thousands of kilometers and work date over 6 months. This model energy source is portable to use, easy to operate, good in performance, and can be used for kinds of exploration survey in many water depth conditions.
Considering its good performance and stability, GMGS bought another two sets of same model energy sources in end 2012 and we look forward to their contribution in our future tasks."
"The oil of the SIG 16 Streamers seems to reduce slower than
those of other manufacturers' streamers. JCG likes this very much."
Report from agent TOYO Corporation, Oct. 2012
Japan Coast Guard has adopted the SIG 16 hydrophone streamers to be used with GI gun for their new survey vessel.