Abstract
In this note we report on the progress of the Canadian geophysics research project known as POLARIS ( P ortable O bservatories for L ithospheric A nalysis and R esearch I nvestigating S eismicity). POLARIS is a multi-institutional infrastructure composed of mobile geophysical observatories that transmit continuous real-time data to research centers using a satellite-telemetry communications system. The major components of POLARIS, when fully installed in 2004, will be 90 seismograph and 30 magnetotelluric (MT) mobile field systems, complementary data-acquisition and satellite-communications equipment, and satellite downlink facilities. The seismograph network is three subarrays of 30 three-component broadband seismographs, sampling at 40 samples/second or 100 samples/second, to be deployed in Ontario, southern British Columbia, and the Northwest Territories. Data acquisition and telemetry are provided by the Nanometrics, Inc. Libra system, while the seismometers are broadband Guralp CMG-3ESP's. This system is ideal for remote installations, requiring no existing infrastructure. All that is needed is a bit of sunshine and a view of the satellite. The POLARIS network complements and works in tandem with the Canadian National Seismographic Network (visit http://www.seismo.nrcan.gc.ca for CNSN locations and data downloads). POLARIS follows an open-data policy, and we invite …
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