The ADQA evaluates the effect of the data marked invalid on the computed discharge using the total discharge estimated for all invalid ensembles and the discharge estimated in consecutive invalid ensembles. The resulting messages are preceded by GGA- or VTG- and the filter resulting in the warning message and by gga- or vtg- and the filter resulting in the caution message. For example, GGA All (GGA-All), GGA Original (GGA-Original), GGA Differential Correction Quality (GGA-DGPS), GGA Altitude (GGA-Altitude), GGA Other (GGA-Other), GGA HDOP (GGA-HDOP), VTG All (VTG-All), and VTG Original (VTG-Original).
Good (Green)
Check—No filters exceeded prescribed thresholds.
Caution (Yellow)
Check—More than 10 percent of the discharge is interpolated for ensembles with an invalid GGA or VTG velocity due to specified filter.
Message—gga- or vtg-filter: T Interpolated discharge for invalid ensembles in a transect exceeds 25 percent.
Check—More than 3 percent of the discharge is interpolated for consecutive ensembles with an invalid gga or vtg velocity due to specified filter.
Message—gga- or vtg-filter: Interpolated discharge for consecutive invalid ensembles exceeds 3 percent.
Warning (Red)
Check—More than 25 percent of the discharge is interpolated for ensembles with an invalid GGA or VTG velocity due to specified filter.
Message—GGA- or VTG-filter: Interpolated discharge for invalid ensembles in a transect exceeds 25 percent.
Check—More than 5 percent of the discharge is interpolated for consecutive ensembles with an invalid gga or vtg velocity due to specified filter.
Message—GGA- or VTG-filter: Interpolated discharge for consecutive invalid ensembles exceeds 5 percent.