EC Raw Binary Format (CH-FRU)

See here for more info about the EC raw binary format.



An overview of used abbreviations can be found here: Abbreviations


Setup since 2005


(1) Raw binary files before 2005070515.b11 contain erroneous data and must not be used.
(2) File extension was changed back to *.X* on 17 Nov 2017, 19:00.
(3) Separation settings estimated from photos and map.
(4) SA orientation is most likely still 342°, although in this table 145° was given previously. With the 145° setting the wind direction is approx. 180° different from previous calculations and from Zeeman et al. (2010).
(5) Calibration gas: There was an issue with the calibration gas used to calibrate the IRGA75. As a consequence, the CO2 concentrations in the raw data files have to be multiplied by 0.974 before flux calculations. This can be directly done during the conversion of the raw data binary files to CSV files when using the FCT Flux Calc Tool. Note the provided EddyPro settings CH-FRU_FRMT-A2 under Downloads at the end of this page: these settings already consider the correction and apply the gain to the CO2 concentration measurements during the conversion from raw binary to CSV. For more info about this issue see here: Wrong Calibration Gas 2017. Affected time period: all IRGA72 CO2 concentrations between 2016113012.b47 and 2019112707.X00.
(6) For this year, multiple months of CH4 measurements are available.
(7) GIN entry 28 Oct 2022: “Measured eddy covariance sensor separation with respect to sonic north, where sonic path is 0/0: Horizontal separation: 0 (+-5) mm, Eastward separation: – 175 (+-5) mm, Northward separation: 288 (+-5) mm, Sonic north: 0 °, Sonic center to north-rod distance: 110 mm”.



EddyPro Settings

File sizes approx. 10 KB.


More Info

Eddy Covariance Raw Data Binary Files