Xylem Sontek River Surveyor RS5 - Page 146

SonTek RS5 User Manual (August 2020) 146
GPS Structure
Processing Structure
RawGPSData Structure (This structure contains 5 columns per sample because the instru-
ment samples the GPS port at 5 Hz)
Parameter Name
Description
Size
GgaAltitude
$GPGGA altitude above sea level for each high frequency GPS
sample (m)
NS x 5
GgaLatitude
$GPGGA latitude for each high frequency GPS sample
NS x 5
GgaLongitude
$GPGGA longitude for each high frequency GPS sample
NS x 5
GgaQuality
$GPGGA fix quality for each high frequency GPS sample
(4 = RTK, 2 = Differential, 1 = Standard, 0 = Invalid)
NS x 5
GgaTimeStamp
$GPGGA time stamp for each high frequency GPS sample
NS x 5
GgaUTC
$GPGGA UTC for each high frequency GPS sample
(HHMMSS.S)
NS x 5
Raw_GPS_Strings
Contains the full raw GPS string for each sample
NS x 1
VtgMode
$GPVTG active mode for each high frequency GPS sample
NS x 5
VtgSogMPS
$GPVTG speed over ground for each high frequency GPS
sam-ple (m/s)
NS x 5
VtgTimeStamp
$GPVTG time stamp for each high frequency GPS sample
NS x 5
VtgTmgMag
$GPVTG magnetic course made good for each high frequency
GPS sample (degrees)
NS x 5
Parameter Name
Description
Size
Altitude
Altitude
NS x 1
DBT_DGPS
Ratio of bottom track distance to GGA track distance
NS x 1
GC_BC
Angle of average GPS course since start of transect
minus ADP bottom-track course (if valid)
NS x 1
Gps_Age
Age of GPS data record
NS x 1
Gps_Geoid
Geoid separation
NS x 1
GPS_Quality
GPS quality (4=RTK, 5=float, 2=Diff, 1=no correction,
0=no GPS)
NS x 1
HDOP
Horizontal dilution of precision
NS x 1
Latitude
Latitude
NS x 1
Longitude
Longitude
NS x 1
Satellites
Number of satellites
NS x 1
Utc
Time in UTC
NS x 1
Utm
UTM Easting and Northing value
NS x 2
Units
Units used
NA
Parameter Name
Description
Size
Screening
User-applied minimum SNR filtering settings, in dB
NA
Corrections
User-applied heading correction, in degrees
NA