Project Alteddy Intro

Introduction Alteddy

Alteddy version 3.90 is a Visual Fortran program developed and used at Wageningen Environmental Research (Alterra) for the processing of raw eddy correlation data.

Changes with respect to version 3.80 are mainly :

Added angle-of-attack correction following Nakai 2012 field calibration
Added parameter AOACOR in *par.txt for selection of AOA correction method
Replaced temperature crosswind correction Schotanus 1983 with Liu 2001
Added Young 81000, Gill HS and ATI K-probe anemometer
old SONTYP 1=R2, 2=WM Pro, 3=R3-50, 4=CSAT, 5=USA-1
new SONTYP 1=R2, 2=WM(Pro) type 1352, 3=WM(Pro) type 1561 and 1590, 4=HS, 5=R3-50, 6=CSAT, 7=Young, 8=USA-1, 9=ATI K
Crosswind correction only for model 1, 2 and 8, for other sonics the firmware correction should be used
Removed sonic path lengths parameters in *Par.txt, now internal
Added parameter UALIGN in *RAW.txt defining alignment of sonic anemometer u-axis
Added rotation of windspeed u and v to conform to right-handed Cartesian for all sonics
Corrected bug in calculation of wind direction for the Gill Windmaster (Pro)
Moved output of raw data file information from log file to new *Raw.csv file
Air pressure is now always output in the *Fmv.csv file, also when daily air pressure is used

Instruments Alteddy can handle:

Gill Instruments R2
Gill Instruments Windmaster Pro type 1352, 1561 and 1590
Gill Instruments R3-50 or R3-100
Gill Instruments HS
Campbell Scientific CSAT3
Metek USA-1
Young 81000
ATI K-probe
Li-cor Biosciences LI-6262/7000 (CO₂ and/or H₂O)
Li-cor Biosciences LI-7500 (CO₂ and/or H₂O)
Li-cor Biosciences LI-7500A (CO₂ and/or H₂O, switch off surface heating correction in parameter file)
Li-cor Biosciences LI-7550 (LI-7500 + data storage)
Li-cor Biosciences LI-7200 (CO₂ and/or H₂O)
Fast response thermocouple
Campbell Scientific Krypton KH2O hygrometer (H₂O)
Campbell Scientific TGA100A TDL (N₂O and NH₃)
Los Gatos Research DLT-100 Fast Methane Analyzer (CH₄)
Li-Cor Biosciences LI-7700 open path methane analyzer (CH₄)
Air pressure (or pressure in cell)

Data formats Alteddy can handle:

ASCII (both comma- and TAB-separated)
binary (2-byte integers, 4-byte integers, 4-byte reals, little and big endian)
Any file size between 30 minutes and 14 days of data. File size can be variable.

examples are included for reading of EddylogP, EddylogW, Edisol, Eddylog, TOB1, TOA1, Carboeurope and GHG raw data files

Alteddy main task :

Process raw data (calculate corrected fluxes, means, variances, etc.).

Alteddy tools:

View raw data (to check for spikes, ranges).

Calculate normalised spectra and cospectra.

Convert raw binary files to ASCII files (for other data analysis).

Calculate planar fit coefficients.

Calculate solar elevation and radiation.

Check the site coordinates in Google Maps.

Rename raw ASCII files (date/time read from first record).

Logging software:

EddylogP is a DOS-based program designed to store serial data from a Gill R2, Windmaster Pro or R3 sonic.
Data are stored at 10 Hz in binary format and can be read by Alteddy.

EddylogM is a Windows Mobile (HP Ipaq) based program designed to store serial data from a Gill Windmaster Pro or R3 sonic.
Data are stored at 5, 10 or 20 Hz in binary format and can be read by Alteddy.

EddylogW is a Windows XP based program designed to store serial data from a Gill Windmaster Pro or R3 sonic.
Data are stored at 5, 10 or 20 Hz in binary format and can be read by Alteddy.

Availability Alteddy and Eddylog(P/M/W):

Freely available for research purposes under the EULA given below, please follow the "Forum" link. Here you can also post your questions / remarks / statements of eternal gratitude.

End User Licence Agreement (EULA):

NOTICE: BY DOWNLOADING AND INSTALLING OR OTHERWISE USING THE SOFTWARE, YOU AGREE TO BE BOUND BY THE TERMS OF THIS EULA. IF YOU DO NOT AGREE TO THE TERMS OF THIS EULA, YOU MAY NOT DOWNLOAD, INSTALL OR USE THE SOFTWARE.

License.
Subject to the terms of this Agreement, we hereby grant You a limited, personal, non-commercial, non-exclusive, non-sublicensable, non-assignable, free of charge license to install and use the Alteddy Software on Your computer for the sole purpose of processing eddy correlation data. For the avoidance of doubt, You are allowed to use Alteddy software at work, in accordance with the terms of this Agreement.

Citing.
You must cite, reference, and/or acknowledge your usage of the Alteddy Software in any publication wherein the Software was used to analyze, process, visualize, or otherwise generate any data or illustrations that were used in the planning, composition, validation, or editing of said publication. Such citation, reference, or acknowledgement shall be performed in a manner that is usual, customary, and appropriate for the publication.

No Granting of Rights to Third Parties.
You will not sell, assign, rent, lease, distribute, export, import, act as an intermediary or provider, or otherwise grant rights to third parties with regard to the Alteddy Software or any part thereof.

No Modifications.
You will not undertake, cause, permit or authorize the modification, creation of derivative works, translation, reverse engineering, decompiling, disassembling or hacking of the Alteddy Software or any part thereof.

Proprietary Notices.
You may not remove any proprietary notices, labels or marks on the Software or Documentation.

Disclaimer of Warranty.
The software is provided on an "as is" basis, without warranty of any kind, express or implied, including, without limitation, the warranties that it is free of defects, virus free, able to operate on an uninterrupted basis, merchantable, fit for a particular purpose or non-infringing. this disclaimer of warranty constitutes an essential part of this license and agreement. no use of the software is authorized hereunder except under this disclaimer.

Limitation of Liability.
to the maximum extent permitted by applicable law, in no event will we be liable for any indirect, special, incidental or consequential damages arising out of the use of or inability to use the software, including, without limitation, damages for lost profits, loss of goodwill, work stoppage, computer failure or malfunction, or any and all other commercial damages or losses, even if advised of the possibility thereof, and regardless of the legal or equitable theory (contract, tort or otherwise) upon which the claim is based.