The IRGASON is measured and controlled by the EC100 electronics, which synchronizes gas and
wind data, essential for valid flux calculations using the eddy-covariance method. The EC100
electronics also uses inputs from an included temperature thermistor probe and a barometer.
“IRGASON” and “EC100” are often used interchangeably in this manual.
The IRGASON has been optimized for remote eddy-covariance flux applications, addressing
issues of aerodynamics, power consumption, spatial displacement, and temporal synchronicity.
Specifically, its unique design contains no obstructions surrounding the sample volume; it
operates with only 5 W of power at room temperature; it has no spatial displacement between
the sample volumes of the gas analyzer and the sonic anemometer; and the EC100
synchronously samples data from the gas analyzer and sonic anemometer.
5. Specifications
5.1 Measurements
Features
l
To compute carbon dioxide and water vapor fluxes using the eddy-covariance method, the
IRGASON measures:
o
absolute carbon dioxide
o
water vapor densities
o
three-dimensional wind speed
o
sonic air temperature
o
air temperature
o
barometric pressure
These measurements are required to compute carbon dioxide and water vapor fluxes using the:
l
Standard outputs:
o
u
x
, u
y
, and u
z
orthogonal wind components
o
sonic temperature (based on the measurement of c, the speed of sound)
o
sonic diagnostic flags
o
CO
2
density, H
2
O density
IRGASON® Integrated CO
2
/H
2
O Open-Path Gas Analyzer and 3D Sonic Anemometer
3
Summary of Contents for IRGASON
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