Table 3 GNSS system parameters, survey conditions and control points
Parameter | Specification |
|---|---|
GNSS system | Topcon HiPer L1/L2 receiver |
Horizontal accuracy | 3 mm + 0.5 PPM |
Vertical accuracy | 5 mm + 0.5 PPM |
System frequency | 20 Hz |
Linear units | meters |
Angular units | degrees |
Datum | WGS84 |
Projection | UTM Zone 23 South |
Geoid | MAPGEO 2010 |
Base Reference Point | INCRA “ABE M0693” |
Number of points measured with success | 35 (out of 36 total) |
Points with σ < 1 m (x,y,z) | 30 |
Points with 1 ≤ σ < 2.2 m (x/y/z) | 5 |
Accuracy (RMSE) Easting | 0.006 - 2.130 m; mean = 0.473 m |
Accuracy (RMSE) Northing | 0.006 - 1.876 m; mean = 0.225 m |
Accuracy (RMSE) Elevation | 0.019 - 2.195 m; mean = 0.469 m |