Dataset description: Data series 856 arc

Chirp 424 data GIS

Keywords	seismic reflection methods, sub-bottom profiling, marine geophysics
Data types	Sub Bottom Profiler
Format	ERSI

Contacts

Contact	Arnell S Forde SPCMSC_data_contact@usgs.gov

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Location of materials and files

Supporting documentation or data
Public files	http://pubs.usgs.gov/ds/856/software/arc/
Digital location	http://pubs.usgs.gov/ds/856/html/ds856_logs.html
Metadata	https://cmgds.marine.usgs.gov/metadata/spcmsc/ds-856.xml Outline - Questions and answers - Text - XML

Activities and equipment

Activity	Equipment
12BIM03	Chirp 424 The EdgeTech 3100-P Portable Sub-Bottom Profiling System is a low cost portable sub-bottom profiler system. It uses Full Spectrum (“chirp”) pulses to create high definition image slices of sub-bottom structure below the bottom. It can be used in rivers, lakes, ponds, and in the ocean. The EdgeTech SB-424 towfish has a frequency range from 4 - 24 kHz. This towfish uses special designed transmitters with low Q- wide band characteristics best suited for “chirp” transmissions. Two multi element line array hydro-phones are installed in the tow vehicle to reduce acoustic scattering from the sides. This results in a narrower across/along track beam pattern.

Activity

Equipment

12BIM03

Chirp 424

The EdgeTech 3100-P Portable Sub-Bottom Profiling System is a low cost portable sub-bottom profiler system. It uses Full Spectrum (“chirp”) pulses to create high definition image slices of sub-bottom structure below the bottom. It can be used in rivers, lakes, ponds, and in the ocean. The EdgeTech SB-424 towfish has a frequency range from 4 - 24 kHz. This towfish uses special designed transmitters with low Q- wide band characteristics best suited for “chirp” transmissions. Two multi element line array hydro-phones are installed in the tow vehicle to reduce acoustic scattering from the sides. This results in a narrower across/along track beam pattern.