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the latest NeMO Net site:
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A near-real-time system which links instruments located in the caldera of
an active submarine volcano, 1 mile underwater and about 250 miles off Oregon's
coast, to the Internet.
NeMO Net 2001 was deployed on July 27 with ROPOS. Instruments include 2 temperature probes and a Remote Access Sampler for obtaining chemical samples. The 2001 system stopped transmitting data on August 5 due to failure of the bottom-mounted acoustic modem. However, sampling should proceed weekly and data will be analyzed when the system is recovered in 2002. |
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Temperature data | ||||
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Temperature was measured once an hour by both probes. Every 24 hours the resulting 72 temperature measurements were transmitted to the laboratory. Tides were displayed for comparison. |
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Chemical sensors | ||||
Sampler system test deployment image | In July, 2001, a time-series sampler capable of collecting vent fluid and particles directly from a seafloor vent was installed. The core of this system is the McLane 48-500 Remote Access Sampler, with hardware and software enhancements done at PMEL. Measurements of pH and H2S will be monitored daily. The sampler will be programmed to take a water/particle sample once per week and collect chemical sensor data twice per week. | |||
Background | ||||
is a breakthrough in ocean engineering utilizing an acoustic modem to relay data from three temperature probes and a camera to a moored buoy, which in turn send the data to NOAA's Pacific Marine Environmental Laboratory via a GOES satellite. The prototype system, operational for one month in 1999 was succeeded in July 2000 by a more advanced system. The new system uses an ORBCOMM satellite system to send and receive commands and data from shore to the seafloor. | ||||
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