EasyFlux® DL is a free CRBasic program that enables a data logger to report fully corrected fluxes of CO2, latent heat (H2O), sensible heat, and momentum from a Campbell Scientific open-path and closed-path eddy-covariance (EC) system. Final fluxes are processed from raw high frequency time series data by applying commonly used corrections found in scientific literature.
In the past, Campbell Scientific's data logger EC programs roughly estimated fluxes, and PC post-processing software was used to fully correct the flux measurements. Now with the EasyFlux® DL program, fully corrected fluxes are processed by the data logger and reported at the end of each EC averaging interval.
EasyFlux® DL has been tested at several stations in various environments, including irrigated alfalfa, grassland, maize, open water, forest, and desert. The results have shown good agreement with fluxes processed using traditional PC-based software applications.
To download EasyFlux® DL, refer to the Downloads section.Read More
Provides fully corrected outputs of CO2 flux, latent heat flux, and sensible heat flux at a user-defined interval (e.g., 30 minutes). Also provides many other variables of atmospheric properties, instrument diagnostics, intermediate corrections, and other energy balance or biomet sensors. Comparisons of flux outputs have shown good agreement with other common post-processing software packages when applying the same set of corrections.
Main correction and processing procedures:
*It may be possible to add non-standard sensors to the program upon request and for a fee.
CR3000 datalogger program for Campbell open-path eddy-covariance systems.
CR6 datalogger program for Campbell open-path eddy-covariance systems.
CR6 datalogger program for Campbell closed-path eddy-covariance systems.
Note: This version corrects the compile error that the previous version had with the GPS instruction.
CR1000X datalogger program for Campbell open-path eddy-covariance systems.
Number of FAQs related to EasyFlux DL: 8
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EasyFlux® DL has been tested in a variety of landscapes including forest, open water, short crops, and desert. It has been found to work well in all landscapes, assuming the instruments are properly maintained.
EasyFlux® DL samples the eddy-covariance sensors at 10 Hz. It is possible to measure at 20 Hz using EasyFlux® DL C6OP running on a CR6 datalogger.
EasyFlux® DL in its native form only supports Campbell Scientific open-path gas analyzers (that is, IRGASON or EC150). In some cases it may be possible to adapt the EasyFlux® DL program for a particular gas analyzer. Contact Campbell Scientific to discuss the possibility of customization and to request a quote.
In most cases it is possible to adapt the EasyFlux® DL program for other biomet or energy balance sensors. Contact Campbell Scientific to discuss the possibility of customization and to request a quote.
To set up EasyFlux® DL, follow these steps:
EasyFlux® DL in its native form only supports the IRGASON or CSAT3A sonic anemometers. It is possible to adapt the EasyFlux® DL program to support other Campbell Scientific sonic anemometers (for example, CSAT3 or CSAT3B). The program cannot be adapted to other non-Campbell sonic anemometers.
It is the responsibility of the user to ensure data quality and fitness for publication. When the instruments are properly maintained and conditions are well-suited for open-path EC measurements, most likely the flux results are in their final and usable form, but the user should still verify that the corrections were appropriate for the site and that the data are fit for further use. The raw time-series data are always stored on a CompactFlash card, so a user may reprocess raw data with a post-processing software package.
EasyFlux® DL is now available for both the CR3000 and CR6 dataloggers.