NEPTUNE

From Wikipedia, the free encyclopedia
Jump to: navigation, search
This article is about the ocean observatory. For the planet, see Neptune. For other uses, see Neptune (disambiguation).

The NEPTUNE Ocean Observatory project is the world’s first regional-scale underwater ocean observatory that plugs directly into the Internet.[1] NEPTUNE is the largest installation on the Ocean Networks Canada network of ocean observatories. Since December 2009, it has allowed people to "surf" the seafloor while ocean scientists run deep-water experiments from labs and universities around the world. Along with its sister project, VENUS, NEPTUNE offers a unique approach to ocean science. Traditionally, ocean scientists have relied on infrequent ship cruises or space-based satellites to carry out their research, while the NEPTUNE project uses a remotely operated crawler.[1]

Overview[edit]

NEPTUNE Canada Overview Map

NEPTUNE is an acronym for North-East Pacific Time-series Undersea Networked Experiments. The North-East Pacific is home to the Juan de Fuca plate—smallest of Earth’s 12 tectonic plates. Its small size and close proximity to the coast gives NEPTUNE Canada a unique opportunity to observe tectonic processes. NEPTUNE Canada is built to provide continuous observations for 25 years. The time-series data gathered will allow scientists to study long-term changes over the life of the project. Instruments comprising the undersea observatory will operate at depths ranging from 17 to 2,660 m. Hundreds of instruments have been connected to the Internet by way of shielded cables carrying both power and fibre-optic communication lines. A database will archive and provide networked access to all archived data. Taking advantage of this platform, scientists collaborating with NEPTUNE are expected to conduct thousands of unique experiments over the life of the project.

Status[edit]

  • The NEPTUNE project was selected as one of the five most significant science projects of the year in 2008 from The Economist.[2]
  • In June 2008, the NEPTUNE project received and successfully tested the world's first “Internet-operated deep sea crawler,” created by a team of ocean scientists at Bremen's Jacobs University, will help researchers measure conditions such as temperature, salinity, methane content and sediment characteristics at the seafloor. The crawler “crawls” on dual tractor treads, which allow a full range of forward, backward and turning movement. Including its titanium frame, drive motors, sealed electronics chambers, wiring, lights, HD video camera, and sensors, the unit's out-of-water weight is 275 kg. With syntactic foam floatation blocks attached, this is reduced to an in-water weight of 40 kg. One unique feature is its control interface, which plugs directly into the Web. Interested people will be able to tune in to a live sea floor crawl on the NEPTUNE website.
  • Late September 2008 NEPTUNE Canada's first fully instrumented instrument platform was deployed by ROPOS from the Canadian Coast Guard Ship John P Tully in Saanich Inlet and connected to the VENUS Saanich Inlet node. This platform was recovered in early 2009 and reconfigured for deployment at Endeavour Ridge during the summer of 2010.
  • 8 December 2009, NEPTUNE Canada's official operational launch was celebrated with a Go-live Event.
  • March 2010, Robert Gagosian, president and chief executive officer of the Consortium for Ocean Leadership in Washington, D.C., and Martin Taylor, president and chief executive officer of Ocean Networks Canada (umbrella organization for both NEPTUNE Canada and VENUS), signed a memorandum of understanding pledging to work closely together as they manage and operate ocean observing systems.
  • These components are connected on a backbone of thick and insulated cable called a spur cable that has two separated lines for transmitting the data in opposite directions. The instruments transmit the data either clockwise or counter clockwise within a 2 by 2 Gbit/s data flow. Since the primary purpose of the system is data collection and analysis, the available instruments generate data of various size and nature. The collected data is then transmitted on the spur cable passing through all the routers that are on one of the best alternative paths of the data flow.[3]

Data Channels and Connections[edit]

In NEPTUNE Canada network traffic, there are 4 different type of network channels that are defined in the network description file based on the data provided. The first channel provides 10 Gbit/s data rate between UVIC (University of Victoria) DMAS (Data Management and Archive Station) and shore station in Port Alberni. This channel has the largest volume in the system, and is located in between the edge of the network of the system and the main receiver UVIC DMAS.

The shore station is linked to the first branching unit as followed with 5 other branching units that are also linked to other branching units. This solid connection spur cable|forms a ring-shaped SONET network that has two cables in order to control the network traffic in two directions. A 2 by 2 Gbit/s data channel is implemented on the spur cable. Furthermore, each branching unit is connected to a regional node station. And the connection between node stations and branching units provide 1 Gbit/s data rate using a fiber-optic cable. 6 Node stations split the back-haul into 6 separated regions and the network behavior in between each regions' devices is identical. Similar to the connections between node stations and branching units, node stations are linked to junction boxes with 1 Gbit/s data rate.

Junction boxes can be linked to both instruments and other junction boxes with different data channels. All the network channels transmit the data with 0.1 delay rate. Junction box to junction box and instrument to instrument connections are implemented with either 1 Gbit/s or 100 Mbit/s data rates. An important connection limit on the junction boxes is that more than 10 components cannot be connected to a single junction box. Instruments can also be linked to either junction boxes or any other instrument with either 1 Gbit/s data rate or 100 Mbit/s data channel. The instruments are the final spot of the each regional network branches. The data flows from the instruments where the edge of each regional branch is located towards UVIC (University of Victoria) DMAS (Data Management and Archive Station) by following a secure and the shortest path as configured by the network configurator used by NEPTSim.[4]

See also[edit]

External links[edit]

References[edit]

  1. ^ a b $2 Million Supports Ocean Observatories NEPTUNE Canada: News. Apr 06, 2007
  2. ^ Visiting Neptune’s kingdom by Geoffrey Carr, The World in 2008, The Economist
  3. ^ MARTONALTI, BURAK; Yvonne Coady; Sudhakar Ganti; Yağız Onat Yazır (August 2012). NEPTSim: Simulating Neptune Canada using Omnet++. 
  4. ^ MARTONALTI, BURAK; Yvonne Coady; Sudhakar Ganti; Yağız Onat Yazır (August 2012). NEPTSim: Simulating NEPTUNE Canada Using OMNeT++.