qcStat: Quality control tests for eddy covariance fluxes
In domvit81/RFlux: Eddy Covariance Flux Data Processing

Description Usage Arguments Value Note Author(s) References Examples

View source: R/qcStat.R

Returns the test statistics of the quality control routines described by Vitale et al (2019).

1	qcStat(path_rawdata, path_output=NULL, FileName=NULL)

`path_rawdata`	path where raw high-frequency eddy covariance data are stored.
`path_output`	path where the results will be stored. Default is NULL.
`FileName`	a character string naming a file for writing. Default is NULL.

A data frame containing:

`TSTAMP`	ISO timestamp start of averaging period (format: yyyymmddHHMM).
`SADiag`	Diagnostic for the sonic anemometer.
`FMR_X`	Fraction of Missing Records in raw, high-frequency, data used for X flux variable estimation.
`LGD_X`	Longest Gap Duration in raw, high-frequency, data used for X flux variable estimation.
`Skew_X`	Skewness of X variable.
`Kurt_X`	Kurtosis of X variable.
`KID0_X`	Kurtosis Index of Differenced X variable.
`KID1_X`	Kurtosis Index of Differenced X variable excluding the effect of possible low resolution problems.
`HF5_X`	Statistic of the homogeneity test applied on X variable fluctuations (percentage of data exceeding +/- 5σ).
`HF10_X`	Statistic of the homogeneity test applied on X variable fluctuations (percentage of data exceeding +/- 10σ).
`HD5_X`	Statistic of the homogeneity test applied on differenced X variable (percentage of data exceeding +/- 5σ).
`HD10_X`	Statistic of the homogeneity test applied on differenced X variable (percentage of data exceeding +/- 10σ).
`COV_XY`	Covariance between X and Y variables.
`N0_X`	Number of repeated consecutive values affecting X flux variable.
`LSR_X`	Statistic of the Low Signal Resolution test for X flux variable.
`M98_X`	Statistic of the non-stationary ratio test by Mahrt (1988) for X flux variable.

The output of qcStat constiutes one of input files required by the ecworkset function.

Domenico Vitale

Mahrt L (1998) Flux sampling errors for aircraft and towers, J. Atmos. Ocean. Tech., 15, 416-429, https://doi.org/10.1175/1520-0426(1998)015<0416:fsefaa>2.0.co;2.

Vitale, D. Fratini, G. Bilancia, M. Nicolini, G. Sabbatini, S. Papale, D. A robust data cleaning procedure for eddy covariance flux measurements, Biogeosciences Discussions, 2019, pp 1-36, doi: https://doi.org/10.5194/bg-2019-270.

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PATH_RAWDATA <- system.file("extdata", "DE-HoH_EC_201907301200_v01.csv", package = "RFlux")
QC_STAT <- qcStat(path_rawdata=PATH_RAWDATA, path_output=NULL, FileName=NULL)
QC_STAT