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The sensors on JKEO4 are as same as on JKEO2, JKEO3 and TRITON buoy. The table below identifies the types of sensors used on JKEO4 moorings and lists their specifications. JKEO4 has additional meteorological sensor, Vaisala Weather Transmitter WXT520, as a backup system.

Last updated on December 23, 2009

Measurement	Sensor type	Manufacturer: Model #	Resolution	Range	Accuracy	Ref.
Wind speed	R.M. Young 5103 wind monitor	Star Engineering:　 ASIMET Propeller and Vane Wind Module (WND)	0.01 m s^-1	0 to 60 m s^-1 (threshold ca. 1 m s^-1)	±1 %	[1]
Wind direction	R.M. Young 5103 wind monitor	Star Engineering:　 ASIMET Propeller and Vane Wind Module (WND)	0.1 °	0 to 360°	3°	[1]
Air temperature	Rotronic MP-101A sensor	Star Engineering:　 ASIMET Relative Humidity & Air Temperature Module (HRH)	0.02°C	-40 to 60°C	±0.05 °C	[1]
Relative Humidity	Rotronic MP-101A sensor	Star Engineering:　 ASIMET Relative Humidity & Air Temperature Module (HRH)	0.01 % RH	0-100 % RH	±1 % RH	[1]
Downwelling shortwave radiation	Eppley Precision Spectral Pyranometer (PSP)	Star Engineering:　 ASIMET Shortwave Radiation Module (SWR)	0.1 W m^-2	0 to 2800 W m^-2	2 W m^-2	[1]
Downwelling longwave radiation	Eppley Precision Infrared Radiometer (PIR)	Star Engineering:　 ASIMET Longwave Radiation Module (LWR)	0.1 W m^-2	0 to 700 W m^-2	2 W m^-2	[1]
Sea surface and subsurface temperature	ultra-stable aged thermistor	Sea Bird Electronics: SBE37-SM (MicroCAT), SBE39-IM, SBE37-IM	0.0001°C	-5 to 35°C	±0.002°C	[2] [4] [3]
Sea surface and subsurface Salinity	ultra-precision Wien-Bridge oscillator	Sea Bird Electronics: SBE37-SM (MicroCAT), SBE37-IM	0.00001 S m^-1	0 to 7 S m^-1	±0.0003 S m^-1	[2] [3]
Water pressure	Druck sensor	Sea Bird Electronics: SBE37-SM (MicroCAT), SBE39-IM	0.002% FS	7000 m 1000 m	±0.1% FS	[2] [4]
Vaisala Weather Transmitter WXT520
Wind speed		Vaisala WINDCAP^®sensor	0.1 m/s	0 ... 60 m/s	±0.3 m/s or ±3%, whichever is greater	[5]
Wind direction						Not available
Air temperature			0.1 °C	-52 ... +60 °C	±0.3 °C	[5]
Relative Humidity			0.1 %RH	0 ... 100 %RH	±3 %RH within 0 ... 90 %RH	[5]
Barometirc pressure			0.1 hPa	600 ... 1100 hPa	±0.5 hPa at 0 ... 30 °C	[5]
Precipitation		Vaisala RAINCAP^® Sensor	0.01 mm		5%	[5]

References

[1] http://frodo.whoi.edu/asimet/asimet_module_specs.html,
　　 http://www.whoi.edu/instruments/viewInstrument.do?id=12827,
　　 http://www.whoi.edu/instruments/viewInstrument.do?id=14686#15228

[2] http://www.seabird.com/products/spec_sheets/37smdata.htm

[3] http://www.seabird.com/products/spec_sheets/37imdata.htm

[4] http://www.seabird.com/products/spec_sheets/39imdata.htm

[5] http://www.vaisala.com/files/WXT520_Datasheet_in_English.pdf

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Home/Overview | Technical Info | Data

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Kuroshio Transport and Surface Flux Group, Ocean General Circulation Observational Research Program, Institute of Observational Research for Global Change (IORGC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC) 2-15 Natsushima-cho Yokosuka-city,Kanagawa, 237-0061, Japan

JKEO web master OGCORP IORGC JAMSTEC