EC Raw Binary Format (CH-AWS)
Last update: [last-modified]
See here for more info about the EC raw binary format.
Legend
An overview of used abbreviations can be found here: Abbreviations
Adaptive Setup since 2015
Notes
(1) From the fieldbook: 22.01.2016 (Patrick Koller, remote): “The wrong Licor Head was installed on AWS. Thus, the data acquisition was configured for the Head 72H-0577, but the mounted head is 72H-0585! On the 22.01.2016 9:45 the appropriate configuration file was installed, Thus the fluxdata until 22.01.2016 9:45 is WRONG as it was measured using a wrong calibration. Li7200 string was wrong, after the update, could be fixed within the next two hours.” Comment LH: data also before 22 Jan 2016 looks fine to me.
(2) Sonic anemometer orientation: the spar where the sonic is mounted points exactly to the north. See here for more information.
(3) SA and GA are now containing additional output columns, similar to the extended formats at other sites, e.g. CH-DAV.
(4) ISSUE: WRONG CALIBRATION GAS: There was an issue with the calibration gas used to calibrate the IRGA72. As a consequence, the CO2 concentrations in the raw data files have to be multiplied by 0.974 before flux calculations. This is done directly during the conversion of the raw data binary files to CSV files when using bico and selecting the appropriate IRGAIRGA72-B-GN1
. For more info about this issue see here: Wrong Calibration Gas 2017. Affected time period: all IRGA72 CO2 concentrations between2017101207.A00
and2019112107.A00
.
(5) Data files no longer affected by calibration gas issue.
Mobile Setup 2006-2016
Notes
(1) R2 has additional byte.
(2) During 2012, there were timestamp issues, resulting in raw data files that have e.g. the year 2021 etc. Currently (Nov 2019) these files cannot be used because it is unknown how this timestamp error can be corrected.
(3) IRGA75 data were logged in mV. Needs linear conversion to yield mmol m-3. TODO
(4) Binary info currently refers to the converted raw binary files (WE).
(5) Data logged @20.7 Hz in one file per hour.
(6) Data logged @20.7 Hz in one file per six hours.
(7) Data files now contain more raw data columns than in previous years.
(8) This first data at the site should not be used, the CO2 fluxes fluctuate around zero and look off.
Last Updated on 6 Jul 2023 13:53