The OGS collects more seismic data around the world. In the last years I
collaborated in several project for collecting high resolution seismic data in
water. The acquisistion system is a
boomer system composed by a power
unit (Pulsar2002-CEA), an electro-dynamic transducer (UWAK-NAUTIK) and a
mono-channel streamer (EG&G and GEO-RESOURCES). The maximum impulse rate was 8
pulses per second at 150 Joule but I use only 2 pulses/s. The source is mounted
on a catamaran frame that allows the plate to be suspended at a constant depth
of 30 cm, leading to a strong reduction of dragging turbulence.The active
section of streamer (8 hydrophones) is 2.8. A navigation system (Navpro-COMMUNICATION
TECHNOLOGY) was used together with a DGPS. The acquisitor is a SB-Logger (TRITON)
a 24 A/D, in the past I used a Delph2.
Signature I measured the boomer signature
with
8103 Bruel & Kjaer.
It's not bad. The signal is a good spike and has a good repeatibility.
Portability The Pulsar is not light
(70kg) but all system can be put in little boats.
Note: All these seismic data was collected and
processed by luca
baradello in OGS