FREQCOR_VM_flag.FREQCOR_VM_flag

FREQCOR_VM_flag.FREQCOR_VM_flag(NumberDataFLAGF, FlagVM_sp, FlagVM_do, FlagVM_skh, FlagVM_dh, gss)

Aggregate VM test flags into one global flag per variable.

EddyPro stores VM flags as a multi-digit code per half-hour, where each digit corresponds to a variable (u, v, w, T, CO2, H2O, CH4, …). This function decodes those codes for several VM tests (spikes, dropout, skewness/kurtosis, discontinuities) and sums the digits for each target variable to produce a global flag.

Parameters:

• NumberDataFLAGF (int) – Number of half-hours.

• FlagVM_sp (array-like) – EddyPro VM flag codes (one per half-hour) for spikes, dropout, skewness/kurtosis, and discontinuities.

• FlagVM_do (array-like) – EddyPro VM flag codes (one per half-hour) for spikes, dropout, skewness/kurtosis, and discontinuities.

• FlagVM_skh (array-like) – EddyPro VM flag codes (one per half-hour) for spikes, dropout, skewness/kurtosis, and discontinuities.

• FlagVM_dh (array-like) – EddyPro VM flag codes (one per half-hour) for spikes, dropout, skewness/kurtosis, and discontinuities.

• gss (int) – Gas species selector (1: CO2, 2: H2O, 3: O3, 4: CH4, 5: N2O).

Returns:

• FlagVM_w (numpy.ndarray) – Global flag for vertical wind speed (w).

• FlagVM_T (numpy.ndarray) – Global flag for temperature.

• FlagVM_g (numpy.ndarray) – Global flag for the selected gas.

Notes

The function discards a VM test column if it contains only 8 and 9 digits (a typical pattern indicating the test was not selected in EddyPro).