Data Quality Indicators during Data Collection in SonTek RSSL

Video Transcript
Download Video
Right-click and save to download

Detailed Description

In this video we will highlight the important data quality indicators in the SonTek RSSL software. Note: Use of trade names is for descriptive purposes only, and does not imply endorsement by the USGS. For additional videos in this series, visit the following link:


Image Dimensions: 480 x 360

Date Taken:

Length: 00:01:31

Location Taken: Augusta, ME, US


Hi my name is Nick Stasulis and I work with the Maine Office of the New England Water Science Center. In this video we will highlight the important data quality indicators in the SonTek RSSL software.

Both during data collection and in the summary for each station there are several important data quality indicators that should be reviewed before moving onto the next station. Obviously, you should be monitoring both the profile plots and the contour plot while data is collecting. The profile plots will indicate large differences in SNR between the four beams, while the contour plot is an easy way to identify possible errors in depth, velocity, and flow angle.

Tabular data on the left of the screen shows information on the number of valid cells, station discharge and flow angle. Since RSSL typically uses the compass to determine flow angles, attention should be paid to the Magnetic Error percent, also found on the left side of the Transect screen under Compass. The time series page allows you to compare depth references, profiling codes, and many other parameters.  Ideally no station should represent more than 5% of the total flow and stationing can be adjusted as needed. Much of this information is summarized in the samples page, as well.

Lastly, the dialog that appears at the conclusion of each station provides some detail on the data for that station. Review the information and recognize that you can reject a station and recollect the data if needed.