60 seismometers will be low-power, lightweight instruments with frequency response from 0.016-50 Hz (e.g., Guralp CMG-40T). The remaining 30 seismometers will have higher sensitivity at longer periods (e.g., Guralp CMG3T/ESP), and will be interspersed with the low-power instruments during deployment.
Audio-frequency magnetotelluric coils (frequency range of 20 - 0.1 kHz for high-resolution studies; standard magnetotelluric sensors (frequency range of 300 - 0.01 Hz) to sample the middle and lower crust; ring-core fluxgate systems for deeper mantle investigations.
A single station design incorporating VSAT telemetry will be used at each site. Data will be transmitted direcrtly to the three central station downlink sites using a UDP/IP multicast with high level selective re-transmission error correction.
Most stations will be powered using solar panels, thermo-electric generators (TEG’s) and wind generators. Temperatures as low as -40ºC are a challenge in the NWT.
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