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Reef Specifications


 General

Depth of Measurement

  • 8 in (20 cm)

Telemetry

  • Iridium SBD with Iridium  9602 Modem

Positioning

  • Multi-constellation GNSS receiver supports GPS and other GNSS constellations depending on receiver configuration.
  • GNSS acquisition windows are optimized for low-power operation and may be extended upon request to improve fix reliability or enable augmentation features where available, with a corresponding reduction in battery life.

Standard Battery Pack

  • 12 V; 8S8P alkaline AA cells; estimated 24 Ah capacity 

Battery Lifespan

  • Operating life: 1–24 months with standard 24 Ah battery pack, depending on sampling/transmission rate and field conditions. Harsh weather or rough seas can increase GPS acquisition time and transmission retries, reducing battery life.

Standard Status Sensors

  • Battery Voltage
  • GNSS Positions (GPS, GLONASS, Beidou, Galileo)
  • Deployment Status (Float in/out of water)

Optional Status Sensor

  • Internal Temperature

Optional Sensors


  • Sea Surface Temperature (SST)
  • High Accuracy Sea Surface Temperature (SST)
  • Water Quality

Sampling Period

  • Variable: 5 minutes to 12 hours
  • Commandable: Change the period after deploying

Power Mode Switch

  • A magnet, held in place with a hook-and-loop strap, switches the drifter from low-power mode to deployment mode when removed.

Diameter

  • 18" (45 cm)


Environmental Sensor Details

Sea Surface Temperature (SST)

Accuracy 0.1 °C, Range -5 to 40 °C

High Accuracy SST

Accuracy 0.05 °C, Range -5 to 40 °C