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The JKEO4 sampling is almost
same with JKEO2 and JKEO3 based on the m-TRITON of which prototype is TRITON
moorings in the tropical Pacific.
JKEO4
measures winds, sea surface air temperature and relative humidity, barometric
pressure, wave height, pCO2, sea surface temperature and salinity
(SST and SSS), subsurface temperatures and salinity, and short wave and long
wave radiation.
All
data collected from the JKEO4 mooring except barometric pressure, wave
height,and pCO2 are publicly available. Hourly surface and subsurface
data from the JKEO4 mooring are transmitted in near real-time. In addition,
spot values of Argos position data are transmitted opportunistically. Daily
averaged surface and subsurface data from the JKEO4 mooring and higher
resolution data recorded onboard the mooring will be made available in the
data page in this web site.
The
table below describes the sampling schemes for the JKEO4 moorings.
Observation times in data files are assigned to the center of the averaging
interval unless otherwise noted. For example, daily averages are computed
starting at 0000 UTC and are assigned an observation "time stamp"
of 1200 UTC.
Last
Updated on December 23, 2009
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Measurement
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Sample rate
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Sample period
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Sample time
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Data interval recorded in memory
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Transmitted data
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Wind speed and
direction
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Once per minute
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1 min
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2358*-,
0008*-,...
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10 min
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Hourly mean
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Air temperature and
relative humidity
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Once per minute
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1 min
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2358*-,
0008*-,...
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10 min
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Hourly mean
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Short
wave radiation
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Once per minute
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1 min
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2358*-,
0008*-,...
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10 min
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Hourly mean
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Long wave radiation
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Once per minute
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1 min
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2358*-,
0008*-,...
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10 min
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Hourly mean
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Sea surface and
subsurface temperature, conductivity, and pressure
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Once per 10 min
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instantaneous
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0000,
0010,...
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60 min
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Hourly value
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Barometric Pressure
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TBA
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TBA
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TBA
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TBA
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TBA
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Wave height
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TBA
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TBA
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TBA
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TBA
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TBA
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pCO2
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TBA
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TBA
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TBA
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TBA
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TBA
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Vaisalar Weather
Transmitter WXT520
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Default
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Default
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0000-,
0010-, , ,
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10 min
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No
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Sample time with * indicate
that it is the time of sending to sensor a wakeup command, and the end time
of sample is not fixed.
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