Select the channel to inspect, from the drop-down list. Both single value and array channel may be selected. The data of the current point or array is then displayed on the graph, located at the top-right of the window.

Hotkey: While the channel entry is in focus, use the ↑↓ keys to move up and down through the channels.

From the drop-down list, select the line to inspect.

Hotkeys: While the line entry is in focus, use the ↑↓ keys to move up and down through the line list.

For the current line and channel, the data can be sorted for inspection by the primary transmitter location (default) or by station. Select the grouping of your preference. Once selected, the grouping graph along the bottom of the dialog will show the corresponding grouping (see Grouping graph).

The position of the station/transmitter for the current data point/array, in the active coordinate system.

Use the arrow keys to move through the data, one station/transmitter location at a time.

Only raw data values are displayed. The averaged data values are skipped. The raw & averaged values are flagged respectively in the Type channel as 0 & 1.

In the case of duplicate readings, all samples are displayed. The sample in focus is outlined. The average of the accepted samples is displayed on the graph in grey. The initial state is to accept all values. Accepted values are shown in green.

Hotkeys: Use the → & ← key strokes to move easily in the grouping through the stations/transmitters.

The data displayed on the graph is further grouped by N values. Finally, the data is sorted by A values calculated from the transmitter/receiver separations.

In cases where the N value is undefined, sorting is done solely by station (or transmitter) number.

Hotkeys: Simultaneously use the Ctrl_→ & Ctrl_← key strokes to move through the data points.

Alternatively, when the N entry is in focus, use the H & N keys to move through the N value.

The index of the data element indicated with a cursor on the graph. For normal channels, this is just 1 of 1, but for array channels, it gives the window number, starting with an index of 1 (unlike array indices in the database, which begin at 0).

If multiple samples coincide - that is, if they have the same Station & N values - they will all be displayed. To select any one of the coinciding samples, click on the desired sample in the table located at the bottom of the dialog window. The selected sample will be outlined in black on the graph.

The current value at the displayed index. This entry is editable.

Once the line or channel is changed, changes are committed to the database, even if Cancel is subsequently used to exit the Quality Control Tool.

Two QC mask channels are provided. By default, all values are accepted. It is recommended to use the QC mask channel to reject bad readings. The points on the graph are colour coded according to the selected QC channel. For Zonge Field data (FLD), the recorded QC data is loaded into the QC IP channel.

The data value or entire array in focus can be Accepted, Flagged or Rejected. The selected QC channel value reflects the user choice as:

• Accepted → 1 - These values are used in all calculations

• Flagged → 2 - These are ignored in calculations, but annotated in square brackets on pseudo-sections

• Rejected → * - These values are always ignored

To flag values as [TN], set the data value to –9999 and set the QC to Flag.

Hot Keys: Use A, F and R to Accept, Flag and Reject samples.

Grouped by TX1: This graph displays the N values vs TX1 locations. Use this graph to move the cursor directly to the desired TX1-N combination, and view the corresponding data in the Data graph.

Grouping by Station: This graph displays the N values vs Station locations. Use this graph to move the cursor directly to the desired Station-N combination, and view the corresponding data in the Data graph.

The Grouping graph is linked to the data graph located in the upper-right corner of the dialog, as well as to the database and the open pseudo-section map, should one be displayed.

The Data graph shows the selected data channel values for the current selection of rows displayed in the data table.

The vertical axis scales automatically to the current selection of data. You can fix the scale by checking the Fix box. Both the minimum and maximum values of the data range are editable.

When looking at an IP array, you can select multiple array elements by holding the Ctrl key down. Selected points are highlighted. The same masking can then be applied to all the selected points.