Contents of file Gxx.csv:

 Row 1:  Frequencies in Hz
     2:  Right side, PSD of ax in m²/(s⁴Hz)
     3:  Right side, PSD of az
     4:  Left side,  PSD of ax
     5:  Left side,  PSD of az

Contents of file Gxy.csv:

 Row 1: CSD between right side ax and right side az in m²/(s⁴Hz)
     2: CSD between right side ax and left side ax
     3: CSD between right side ax and left side az
     4: CSD between right side az and left side ax
     5: CSD between right side az and left side az
     6: CSD between left side ax and left side az
