QRev
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  • 13. Selected Reference

13. Selected Reference

The Select Reference button will only be active if GPS data are available. Clicking the Select Reference button opens a window that allows the user to change the navigation reference and to turn composite tracks on or off.
13. Selected Reference
1

Summary Table

1. Summary Table
The summary table allows the user to select which transect is displayed in the graphs (by clicking on the desired row) and provides information on the number of ensembles referenced to each navigation reference.
 
Filename—Filename of the transect.
# Ensembles—Total number of ensembles in the transect.
# Ref BT—Number of ensembles referenced to bottom track.
# Ref GGA—Number of ensembles referenced to GGA.
# Ref VTG—Number of ensembles referenced to VTG.
# Ref INT—Number of ensembles for which the boat velocity has been interpolated.
Discharge Prev. —Total discharge prior to most recent filter change.
Discharge Now—Total discharge after applying the most recent filter change. If no filters have been changed, the discharge now will equal the discharge previous.
Discharge % Change—The percent difference between the discharge previous and the discharge now due to the last filter change.
 
2

Transect Displayed

2. Transect Displayed
Filename of the transect displayed in the graphs.
3

Referenced Used

3. Referenced Used
The Reference Used time series displays the reference used for each ensemble of the selected transect.
VTG--GPS using VTG data type
GGA--GPS using GGA data type
BT--Bottom track; INT--Interpolated by QRev
INV--Invalid (no data and no interpolation)
4

Boat Speed

4. Boat Speed
The Boat Speed time series shows the boat speed for each of the references. The user can display or hide specific references by clicking on the check boxes (this only effects the display not the reference used).
5

Ship Track

5. Ship Track
The ShipTrack panel allows the GGA, VTG, and BT ship tracks to be compared. Invalid data are identified with a symbol, which is defined in the legend. The water vectors are only graphed on the navigation reference currently selected for discharge computation. The data shown in the graph are controlled by check boxes at the bottom of the panel.
6

Select Reference

6. Select Reference
The Selected Reference panel shows the currently selected reference and allows the user to change the reference by clicking on the radio buttons.
7

Composite Tracks

7. Composite Tracks
Composite tracks is a feature that will automatically substitute one of the other valid navigation references for the selected navigation reference if the selected reference is invalid. The approach used for composite tracks in QRev is summarized in the table below. These settings apply to all transects and cannot be set differently for individual transects. QRev defaults the navigation reference to that used in the raw data. Composite tracks defaults to off.
 
Reference Quality
Reference Used
                                 Bottom Track (BT) Selected
 
BT valid
BT
BT invalid
VTG
BT invalid, VTG invalid
GGA
BT invalid, VTG invalid, GGA invalid
Interpolate from BT data
                                                           GGA Selected
 
GGA valid
GGA
GGA invalid
VTG
GGA invalid, VTG invalid
BT
GGA invalid, VTG invalid, BT invalid
Interpolate from GGA data
                                                           VTG Selected
 
VTG valid
VTG
VTG invalid
GGA
VTG invalid, GGA invalid
BT
VTG invalid, GGA invalid, BT invalid
Interpolate from VTG data
8

Graphics Toolbar

8. Graphics Toolbar
Allows user to zoom, pan, and query the graphs. For more information see Toolbar.
9

Add Comment

9. Add Comment
Allows the user to add a comment. For more information see Comment Button.
10

User's Guide

10. User's Guide
Opens this User's Guide.
11

Close Window

11. Close Window
Closes window and returns control to the main window.