SonTek, a Xylem brand
136
RiverSurveyor S5/M9 System Manual (February 2013)
minimum of 2 valid cells and that the SNR profile plot shows the beams are measuring similar
depths and are not obstructed by something below the water surface.
Figure 122. Raw Sample Display
Once the M9/S5 is in position, enter all relevant information into the appropriate field. On the far
right side of the station dialog is the graphical display of the vertical water column for the Sta-
tion. This graphical display is known as the
Station Window
and is visible for all stations.
The following is a brief description of each field in the station dialog:
Location:
Distance measured from start bank using tagline.
User Depth:
Only required if M9/S5 depth measurement is not available.
Transducer Depth:
Depth of instrument below water surface
Screening Distance:
Screens velocity cells near surface that may be contaminated due to in-
terference from large boat hull.
Coordinate System:
ENU or XYZ. ENU enables compass and references measurements from
magnetic north. XYZ disables compass and references measurements from the internal system
axis. Coordinate reference can be changed on a station by station basis if required.
Averaging Time:
Time data will be collected and averaged for each station. Longer averaging
times in general tend to better represent a true mean discharge in the river. For example -
USGS recommends minimum 40-seconds.
Velocity Correction Factor:
0 – 1. Value of 1 is most common. Please refer to your agencies’
guidelines for reducing this factor.
Gauge Height:
Observed water level from a known datum at your measurement location. Not
required for data collection.
Auxiliary Gauge Height:
Second water-level reference measurement from a similar datum.
Not required for data collection.
Water Surface Type:
Open Water, Ice Cover or Ice with Slush. Open Water is the only option
available in this release.
Ice thickness:
Available in future release.
Water Surface to Bottom of Ice:
Available in future release.
Water Surface to Bottom of Slush Ice:
Available in future release.
Содержание SonTek River Surveyor M9
Страница 10: ......
Страница 118: ......
Страница 150: ...SonTek a Xylem brand 140 RiverSurveyor S5 M9 System Manual February 2013 Figure 126 Island Edge...
