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| General |
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 METOCEAN developed the M-CAD (METOCEAN Compact Arctic Drifter) in conjunction with the Japan Marine Science and Technology Center to provide polar research scientists with cost-effective, in-site, near real-time environmental information. The M-CAD reports meteorological and oceanographic data via satellite and also stores this data internally as a backup. This system consists of four major elements: underwater sensors, meteorological sensors, a system controller and a data telemetry system -- complete with internal data logger. All of the underwater sensors communicate with the main system controller via inductive coupling telemetry on the underwater strain member. The system controller is microprocessor-based and controls each of the sensor data acquisition and processing modes.
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| Sensor Sampling |
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| The sensor systems and the electronics for data acquisition, processing, formatting and telemetry control have been adapted from METOCEAN's highly successful drifting buoys. Over 3,500 of these buoys have been deployed in open oceans and Polar Regions of the world during the last 20 years. Meteorological sensors include; Wind Speed and Direction (RM Young), Air Temperature (YSI) and Barometric Pressure (Paroscientific). Our Ice Platform is equipped with a GPS receiver to provide highly accurate platform positions. An external test port allows verification of correct buoy function before deployment and also allows data to be downloaded from the internal data logger after deployment.
Underwater conductivity, depth and temperature (CTD) are measured using Sea-Bird SBE 37IM MicroCat sensors. These sensors also use inductive coupling for data telemetry to the system controller in the Ice Platform. Their location can easily be adjusted before final deployment.
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