Seafloor Data Loggers. Phase 1.

The current demand for large spatial armys of seafloor instruments and deployment times of up to 12 months can be best fulfilled by inexpensive, low-power data loggers with modern commercial magnetic disk drives for on-board mass storage. We recently designed, constructed, tested, and used 6 seafloo...

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Bibliographic Details
Main Authors: Orcutt, John, Constable, Steve
Other Authors: SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA
Format: Text
Language:English
Published: 1996
Subjects:
Physical and Dynamic Oceanography
Computer Hardware
*OCEANOGRAPHIC DATA
*DATA ACQUISITION
*OCEAN BOTTOM
*MAGNETIC DISKS
*MAGNETIC DRIVES
LOW POWER
SPATIAL DISTRIBUTION
DEPLOYMENT
COMMERCE
CLOCKS
RATES
CRYSTALS
FRACTURE(MECHANICS)
COSTS
CODING
SAMPLING
SEISMIC WAVES
DRIVES
INSTRUMENTATION
RECORDING SYSTEMS
DATA COMPRESSION
HYDROPHONES
REFRACTION
ONBOARD
MASS STORAGE
*SEAFLOOR INSTRUMENTS
L CHEAPO(LOW COST HARDWARE FOR EARTH APPLICATIONS AND PHYSICAL OCEANOGRAPHY)
PHYSICAL OCEANOGRAPHY
Antarctic
Australian-Antarctic Discordance
Antarc*
Online Access:http://www.dtic.mil/docs/citations/ADA305982
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA305982
Description
Summary:The current demand for large spatial armys of seafloor instruments and deployment times of up to 12 months can be best fulfilled by inexpensive, low-power data loggers with modern commercial magnetic disk drives for on-board mass storage. We recently designed, constructed, tested, and used 6 seafloor data loggers equipped with hydrophones for seismic refraction experiments on the Clipperton Fracture Zone and Australian-Antarctic Discordance. The instruments are based on Onset's Tattletale microcomputer, weigh only about 70 kg in air, and cost much less than existing instruments of comparable capability. They can be powered for up to one year, using expendables costing as little as $300 for shorter deployments, and record up to 4 Gbyte of data on disk drives using currently available hardware (10 Gbyte are available at this time), which with modest data compression would allow a sampling rate of 256 Hz over a yean Using modern clock crystals, timing can be corrected to 0.1 s/year or better.

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