BHD - Timeplot Display

The Timeplot Display shows raw observation or computed data over a user specified period of time. Observations are displayed scrolling from right to left in a time series pane, with a numerical pane below showing Last, Maximum, Minimum, Count, Mean and SD values (the statistics of the plot view).
Multiple observations of different type can be displayed in one screen, each with its own associated vertical scale and midpoint value, i.e. various scales exist simultaneously. Click on an observation in the lower pane to see what its vertical scale and mid value are set at.
A fix number can also be displayed.

Take the following steps to create and configure a Timeplot Display:

image2016-3-8 11:5:42.png Go to “Options” on the menu bar of the Controller and select “Displays”, or click on the Displays icon .

This opens the Display Manager.

image2016-3-8 11:17:51.png Click on to open the Add Display dialog:

image2016-3-8 11:21:39.png Select type “Timeplot Display” and enter a title name.

Pressing OK opens the Select Observations dialog on top of an empty Timeplot dialog:

image2016-3-21 16:8:49.png Select the type of observation to display.

- System Raw Data: Raw observation values from any one or more of the systems defined in the template database.
- System Results Data: Computed system observations.
- DTM Result Data: Computed echosounder results (primarily multibeam).
- Computation Results Data: Results from the position calculation.
- Node Result: Computed node positions.

For dredging the observations likely of interest are:

- System Raw Data: Dredging Sensors. For example Volume, Weight, Hopper Level, Status and Flag.
- System Raw Data: Draft Sensors, motion sensors, pseudo-USBL, gyro and tide.
- System Results Data: computed tide result.

image2016-3-21 16:9:12.png Expand the tree objects and highlight an observation.

image2016-3-21 16:9:37.png Click on to move the observation from 'Available' to 'Selected'.

	Highlight every nth observation in the list. When is pressed, these observations are deleted. This option can be useful for example, when a large number of beams from a Multibeam echosounder were selected.
	The previously highlighted items are deselected.

Repeat these steps to add observations. Multiple observations from different types may be added to the selection list.

Click here to see a listing of parameters associated with each observation type...

System raw data
Value	Show the actual received raw values.
Quality indicator	Show the quality of the received data.
Delta value	Show the difference between two consecutive system observations. For example System Raw Data - Motion sensor - Roll Observation followed by Delta Roll value. This shows the differences between successive roll observations.

System results data
Status	Show status.
Residual	Show residual.
W-test	Show W-test.
A priori SD	Show a priori standard deviation.
MDE	Show marginally detectable error.
Ext Rel (2D)	Show external reliability.
Age	Show age.

DTM results
Across distance from TD	Show across distance from transducer head.
Along distance from TD	Show along distance from transducer head.
Easting	Show Easting local coordinates.
Northing	Show Northing local coordinates.
Height	Show beam which is corrected for sound velocity and motion.
Horizontal TPE	Show the trend of the horizontal TPE (Total propagated error or uncertainty) values for a selected beam.
Vertical TPE	Show the trend of the vertical TPE (Total propagated error or uncertainty) values for a selected beam.

Computation results
F-test value	Show value for F-test.
F-Test limit	Show limit for F-Test.
Number of iterations	Show number of iterations.
Number of observations	Show number of observations.
Number of unknowns	Show number of unknowns.
Number of rejections	Show number of rejections.

Node results
Easting/Northing/Height	Show Easting/Northing/Height in local coordinates for the selected node.
Latitude/Longitude	Show Latitude/Longitude in local coordinates for the selected node.
SOG/COG	Show the Speed/Course Over Ground of the selected node.
Heading	Show the heading of the object upon which the selected node is located.
Pitch/Roll	Show the pitch/roll of the object upon which the selected node is located.
2D Distance Raw-Filtered	Show the 2D distance between the raw and the filtered observation of the selected node.
Height Diff Raw-Filtered	Show the height difference between the raw and the filtered observation of the selected node.

Select to complete the selection. The Timeplot dialog lists the chosen observations:

The values start to scroll from right to left. Initially vertical scales take on default values which in most cases need modification. Default colors may also need changing.

image2016-3-21 17:47:48.png Double click on an observation to open the Edit Observation Settings dialog.

image2016-3-21 17:48:9.png Modify color, maximum and minimum values appropriately.

Select a Color and check the numerical values for Minimum, and Maximum. The Mean value in the lower panel can be used as a guide to entering Minimum and Maximum values.
The following picture uses a simulated situation but does provide an idea of what to expect.

Button	Description
	Opens the Select Observations dialog where changes are made to add and remove Observations.
	Opens the Observation Settings dialog. Click on an Observation and press Edit.
	Opens the View Properties dialog. All parameters are fairly self explanatory. If not, expand the link below.

Click here for a description of View Properties parameters...

Timeplot View
Draw lines between updates.	Connect points with a line, showing the picture as a graph.
Draw big dots	Show points using more pixels.
Draw grid lines	Draw a grid over the graphical view.
	Adjust vertical scale to fit observation automatically.
	Enter a value. When zooming in, the vertical axis is shown N-times as large of small where N is the entered value.

Grid Definition
	Enter a value for the horizontal axis.
	Number of grid cells overlaying the graph in horizontal direction.
	Number of grid cells overlaying the graph in vertical direction.

Data Corrections
	Apply corrections from the template database to raw data.

Numerical View
Show numerical pane with the following columns	Activate to show the numerical pane.
Name	Name of the selected observation.
Scale	Show vertical axis scale.
Last Value	Show last decoded or computed value.
Count	Show number of values in the graph.
Minimum Value	Show minimum value in the graph.
Maximum Value	Show maximum value in the graph.
Mean Value	Show mean value in the graph.
Standard Deviation	Show calculated standard deviation in the graph.

Format Definitions
Numerical Format	Pull down menu with various resolutions for numerical format.
Time Format	Pull down menu with various resolutions for time format.

Unit Definitions
Rotation Reference	Pull down menu with various rotation units. These units can be adjusted depending on the Selected Observations.
Speed Value Unit	Pull down menu with various speed units. These units can be adjusted depending on the Selected Observations.

Return to: top of page.

Return to: BHD - Online Displays.

Node results