ADCP Navigation Method
A reference table for codes that describe the navigation method for an Acoustic Doppler Current Profiler (ADCP) discharge measurement.
United States Geological Survey, Surface Water User Group
| Code | Sort Order | Valid Flag | Name | Description |
|---|---|---|---|---|
| UNSP | 1 | true | Unspecified | The navigation method was not specified. |
| GGA | 2 | true | DGPS unit using position | NMEA-0183 output from DGPS unit using position differentiation by latitude and longitude. |
| VTG | 3 | true | DGPS unit using velocity | NMEA-0183 output from DGPS unit using velocity output from the DGPS unit. |
| BT | 4 | true | Bottom tracking | bottom tracking doppler shift used to compute boat speed over ground. |
| NONE | 5 | true | No velocity references | no velocity references therefore velocities represent both boat and water movement. |