SonTek – a Xylem brand
FlowTracker2 User’s Manual (January 2019)
211
G
Mean Vy Standard Error is the mean of the Y
velocity standard error of all point velocity
measurements.
D
Mean Vz Standard Error of each station Z velocity
standard error.
G
Mean Vz Standard Error is the mean of the Z
velocity standard error of all point velocity
measurements.
D
Mean Temperature is the mean of all the station
temperature measurements
G
Mean Temperature of all point temperature
measurements
D
Spacing between stations has changed by more
than Max Location Change
D
Station location out of sequence or outside river
edge.
Water_Depth
D, G
Station depth differs from adjacent stations by
more than Max Depth Change %.
Boundary_Interference
D, G
Evaluates the measurement environment for
interference from underwater obstacles
Fractional_Depth
D
Verify ratio between measurement depth and
total depth and this should not >1
Warning if SNR between 4dB and 7 dB
Beam_SNRs_Not_Similar
D, G
Difference in SNR for any 2 beams is > SNR
Threshold
Large_SNR_Variation
D, G
One-second SNR data varies more than expected
during a measurement along a single beam.
SNR_Threshold_Variation
D
SNR more than SNR Threshold different previous
measurements
Velocity_Standard_Error
D, G
σV (standard error of velocity) is a direct measure
of the accuracy of velocity data.
D, G
The percentage of spikes within a point velocity
measurement.
The flow angle towards the ADV.
The angle of the wading rod from the vertical
Station_Discharge
D
Station contains a large portion of the total
discharge.
End_Edge_Location
D
Station location out of sequence or outside river
edge.
Noise_Level
D, G
Shows the electronics noise level for the receiver
of each beam
The physical location of the sampling volume
The shape of the sampling volume
Pre_Calculation_Validation
D, G
Consistency check on station data (e.g. edges,
island edges, etc.)
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