Great Bay Real-Time Environmental Monitoring Network
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Central Great Bay


Great Bay Monitoring Buoy
The Great Bay sonde is deployed from a buoy in mid Great Bay. In addition to the YSI 6600 sonde that measures depth, dissolved oxygen, oxygen saturation, pH, conductivity, salinity, temperature, and turbidity, a YSI 9600 in-situ nitrate autoanalyzer is deployed from the buoy.

The buoy derives power from an array of 3 solar panels that recharge a set of batteries. An onboard data acquisition system controls and operates the sensors to conduct measurements. A 900 mhz spread spectrum telemetry system transmits the environmental data to the base station at Jackson Estuarine Laboratory.
Site and System
43 04' 20" N
70 52' 10" W
Water depth (MLW)
4.0 meters
(13.12 feet)
Tidal range
2.7 meters
(8.86 feet)
Maximum tidal velocity
0.5 m/s
(1.64 ft/s)
Bottom type
Mud and rock
Telemetry system
Spread Spectrum radio
(900 MHz)

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