Overview

These data provide vertical mean profiles of wind and direction (30 min time step and 10 m range gate).

Data Details

Data averaged over an interval of 30 minutes.

Wind Direction is from Geographic North.

Time stamp is included in each data file.

Location: John Day/Rufus Water Treatment Plant (45.690842,-120.745751). Site Elevation: 62 m.

Data Quality

Data quality procedure applied to this dataset is through the Sodar Operation software/firmware (APRun 1.48 by Scintec).

APRun calculates wind speed, temperature, and all other output data from the raw data received from the device server during measurement. Raw data contain raw received signal data (Fourier power spectra) obtained during measurement. The raw data are filtered, preprocessed, and averaged over one full averaging interval (30 minutes). Various corrections and filters are applied, such as ground clutter detection and removal. All signals of the different subcycles, measurement beams, and acoustic frequencies are decoded and combined according to a composition matrix (Composit Construction Table). A pattern recognition and fit procedure obtains primary results for wind components and signal quality scores.

The primary results are checked against local signal quality criteria, combined signal quality criteria, and two-dimensional spatial/temporal consistency tests.

Any data that do not pass all quality control tests are invalidated and removed, i.e., the output files contain error values (e.g., 99.999).

APRun also applies a declination angle correction based on the antenna azimuth angle [deg] provided by the user. The antenna azimuth angle is provided in the header of each data file.

For more details, refer to the Scintec Flat Array Sodar – Software Manual APRun Version 1.27.