Stokes Drifter

The NEW Stokes Iridium drifter is a revolutionary compact drifting buoy that tracks water currents at the surface.

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Product Description

The Stokes Drifter is a compact drifting buoy that tracks water currents at the surface. The small light-weight buoy is equipped with Iridium satellite telemetry, GPS positioning, and a sea surface temperature sensor. Iridium satellite telemetry enables the buoy to provide vital sensor and geo-positional location data in real-time.
Iridium also allows the buoy to have bi-directional capabilities. This is a critical ability, for example, if the buoy enters a region of interest the end-user can communicate with the unit by sending it a command to change reporting intervals or request essential time-sensitive data.
The applications for the Stokes Drifter are endless due to its compact size, however, the buoy is ideal for purposes ranging from mapping large-scale ocean currents, spill monitoring, environmental monitoring, and aiding in search and rescue operations.

• User-serviceable
• Low profile surface tracker
• Real-time and bi-directional data via Iridium satellite

The Stokes Drifter uses Iridium Short Burst Data (SBD) mode for transmitting data. The configuration of the Stokes Drifter may be changed using Over-The-Air (OTA) commands. These commands may be issued by MetOcean LiNC web-based platform or customized solutions could be developed.

Iridium is a network of commercial communication satellites in low earth orbit. Unlike geosynchronous satellites, Iridium satellites constantly move between the North and South poles, relaying connections from one satellite to the next. This configuration results in the most complete coverage of any satellite communications provider.

The Stokes Drifters are equipped with an Iridium 9603N transceiver that utilizes the Iridium Short Burst Data (SBD) service. Iridium SBD Service is an efficient network protocol designed for short sized data messages. SBD uses a proprietary network protocol to transfer data messages to and from the remote device.

MECHANICAL SPECIFICATIONS
Outer Diameter 24 cm
Height 4 cm
Weight 920g

POWER CONSUMPTION
Shelf Life 5-year shelf life (before battery replacement required)
Deployment Life Typical +4 months (1-hour sample interval and 2-hour reporting interval)
Battery 10 AA batteries (comes installed and replaceable)

INTERFACES
Bluetooth BLE 5.0
Satellite Iridium SBD
GNSS +/- 2.5M accuracy and cold start fix <29s

INTERNAL SENSORS
Temperature Sensor 0.1°C Accuracy (-5°C to 40°C)

ENVIRONMENTAL
Operating Temperature -20°C to +65°C
Storage Temperature -40°C to +65°C
Ingress IP68
Test Approvals IEC 60945 Section 8.5 (Thermal Shock), SAE J1455 Thermal
Cycling, SAE J1455 Section 4.9.3
(Low Pressure), SAE J1455
Temperature Cycling

REGULATORY APPROVALS
IC (ISED) [Pending]
EC [Pending]
FCC [Pending]