Clarification on the Type of Example Data Used in ./resources/airfoil-self-noise.continuous.txt

[miaomiao-alt]

I am currently working with the Tetrad package and using the example data file located at ./resources/airfoil-self-noise.continuous.txt. I need some clarification on the nature of this dataset. Could you please let me know if this example data represents cross-sectional data, time series data, or repeated measures data?

Thank you for your assistance!