SonTek, a Xylem brand
96 RiverSurveyor S5/M9 System Manual (February 2013)
RawGPSData structure (This structure contains 50 columns per sample because the instru-
ment samples the GPS port at 50 Hz. However, because we require the GPS to output normal-
ly only up to 10 Hz, typically only the first 10 columns contain data, while the remaining 40 are
filled with 0)
$GPVTG time stamp for each high frequency GPS sample
$GPVTG true course made good for each high frequency GPS
sample (degrees)
$GPVTG magnetic course made good for each high frequency
GPS sample (degrees)
$GPVTG speed over ground for each high frequency GPS sam-
ple (m/s)
$GPVTG active mode for each high frequency GPS sample
$GPGGA time stamp for each high frequency GPS sample
$GPGGA latitude for each high frequency GPS sample
$GPGGA longitude for each high frequency GPS sample
$GPGGA fix quality for each high frequency GPS sample
(4 = RTK, 2 = Differential, 1 = Standard, 0 = Invalid)
$GPGGA altitude above sea level for each high frequency GPS
sample (m)
$GPGGA UTC for each high frequency GPS sample
(HHMMSS.S)
Setup structure
Start edge (0 = Left bank; 1 = Right bank)
Magnetic Declination (degrees)
Transect azimuth (Stationary measurements)
Coordinate system (0 = Beam; 1 = XYZ; 2 = ENU)
Track reference (0 = System; 1 = Bottom Track; 2 =
GPS GGA; 3 = GPS VTG)
Velocity reference (0 = System; 1 = Bottom Track; 2
= GPS GGA; 3 = GPS VTG)
Depth reference (0 = Vertical beam; 1 = Bottom
Track)
User input salinity (ppt)
Vertical screening distance (m)
Start Edge: Distance to the bank
Start Edge: Estimated discharge
Start Edge: Method (0 = User input discharge; 1 =
Vertical bank; 2 = Sloped bank)
End Edge: Distance to the bank
End Edge: Estimated discharge
End Edge: Method (0 = User input discharge; 1 =
Vertical bank; 2 = Sloped bank)
User input rated discharge
extrapolation_Top_nFitType
Profile Extrapolation - Top: Fit equation type (0 =
Constant fit; 1 = Power fit)
extrapolation_Top_nEntireProfil
Profile Extrapolation - Top: Fit (0 = Use entire profile;
1 = User selected number of cells)
extrapolation_Top_dExponent
Profile Extrapolation - Top: Power fit exponent