Campbell Scientific Open Path Eddy Covariance (OPEC) - Manual (Page 33)

OPEC Open-Path Eddy-Covariance System
• Spatial separation correction or maximum covariance.
• Coordinate rotation (mean vertical wind = 0 or planar fit).
• Spectral analysis.
• Wavelet analysis.
• Webb et al. (1980) term for latent heat flux and CO
2
flux. This term is
separated into its components due to temperature and to vapor density
fluctuations.
• Wind direction and wind speed from the sonic anemometer.
• KH20 Krypton Hygrometer oxygen correction.
There is a certain level of complexity inherent in any software package with
EdiRe’s flexibility. At the University of Edinburgh ftp site you will find an
online user forum (http://www.geos.ed.ac.uk/abs/research/micromet/
EdiRe/EdiReForum/), FAQ (http://www.geos.ed.ac.uk/abs/research/
micromet/EdiRe/Help_information.html), and tutorials (http://www.geos.ed.
ac.uk/abs/research/micromet/EdiRe/Tutorials/).
Along with the information on the University of Edinburgh’s ftp site, see the
EdiRe online help and the Campbell Scientific Application Note on using
EdiRe. EdiRe lends itself to experimentation. The best way to learn how to
use EdiRe is to experiment with it.
EdiRe is not a Campbell Scientific product. Campbell Scientific
provides limited support of EdiRe, specifically in reading in
TOB1 data files. If further support is required, contact the
support personnel listed at http://www.geos.ed.ac.uk/
abs/research/micromet/edisol/edicontact.htm. NOTE
4.2.2.1 Creating Raw File Format and Processing Lists
Start EdiRe, select the Processing | Interpreter menu. Fill out the Interpreter
screen as shown in FIGURE 4-15. In the “Sample file” pull down menu,
navigate to the folder that contains the raw time series data and select one of
the TOB1 files (FIGURE 4-16). Do the same for the “Format list file name”
and “Processing List file name”. After the Interpreter screen is filled out, it
should look something like FIGURE 4-17. Now click on the “Create” button.
EdiRe will estimate the data collection frequency and display this estimate in a
pop-up window. The estimate will be wrong because EdiRe includes the
header information as data records in the file. Enter the correct data collection
frequency (FIGURE 4-18). Now, click on “OK” and then “OK” again. EdiRe
will create and load the format and processing lists.
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