Alert, Observation Physics and Node QC Displays are useful for initial checking of the hardware and software configuration. The Alert display remains centrally important to ongoing dredging operations whereas the Observation Physics and Node QC Displays are less important and maybe not active during operations.
Other displays presented here are primary to monitoring operations.
Observation Physics
The Alert Display monitors serial and network data communication but does not concern itself with time tagging and data values. The Observation Physics display is useful for checking data reception and data values during the project setup phase, i.e. the correct driver is being used. It lists observations with their times and values.
When creating the display for the first time the Select Observations dialog is shown first.
Clicking on the double arrow moves all the available observations to the right.
Note this same dialog is shown via the Select Observations icon .
Click on OK and the observations are listed.
Check the time and raw values to make sure that they are as you expect.
Click on View Properties to select columns and formats to display.
Another display that is very useful after defining and/or changing systems in the Database Setup program. It quickly checks that the computations you set up are actually solving. When creating the display for the first time the Select Nodes dialog is opened first.
Click on the Reference Point symbol.
This conveniently moves the Reference Points of all objects to the right pane. These nodes are all you need to ensure that positions are being computed for all objects.
Single arrows move only the highlighted node. Double arrows move all nodes.
Note that the Select Nodes icon also opens the Select Nodes dialog.
Uncheck the Primary Computation tick box if there are multiple computations defined.
Once nodes are defined the display dialog opens. In the example there are three computations: C-NAV, NR203 and Aquarius. If any computation is not solving rows for the failing nodes are highlighted in red and the cause of the failure is displayed in the Status column.
The best approach to solving a computation failure is to disable all objects and systems under Computation Settings - Overview, except for the main object and the primary positioning system. First make sure that combination solves. If it does, enable further Systems on the first Object. If that works add another object and enable the systems used to position it. Check that combination solves.
Keep adding objects and systems one at a time until the computation fails again. This process pinpoints the problem system.
Click on the View Properties button to modify display content.
Use the Alert Display to generate visual and/or audible warnings about failing I/O of interfaced systems, as well as received or calculated values that do not meet user-defined criteria, e.g. upper and lower limits. Alerts for computations that are on Standby show their suspended status.
Dredging Result alerts are only available when Dredging Systems are present in the template database (Online) or the recorded database (Replay). The actual alerting values must be entered in the Controller's Settings - Session Setup - Dredging - Intrusion Detection menu.
An empty dialog is shown when making a new display. If modifying the alerts of an existing display click on in the toolbar.
Click on the add button.
Select a category. Then select the Alert Type.
Select from parameter lists and/or enter parameter values.
Category
Description and Parameters to enter
I/O Alerts
Monitors incoming and outgoing serial and/or network data. All systems can be added at once or individual systems one at a time.
Various parameters require selection or value entry:
Pause storage on fire
Resume storage on OK
The Timeout value
The applicable System
Raw Data Alerts
Various parameters require selection or value entry:
Pause storage on fire
Resume storage on OK
Upper and/or Lower Limit
The applicable System
The applicable Observation
For comparisons:
The applicable System
The applicable Observation
The compare method. This property is available for the following alerts: "Observation comparison", "Observation delta comparison". Absolute - The default method. The absolute value (always positive) will be taken from the difference. Primary - Secondary - This method compares the two values using the following formula: difference = value from primary selection minus value from the secondary selection.
Computation Result Alerts
Computation Result can trigger alerts in two ways:
The criteria set in the alert are reached.
The computation that is being watched has timed out. This time-out threshold can be set in the Computation Setup dialog, under the tab Position Results, in the field Maximum position age. The default value is 5.0 seconds.
Various parameters require selection or value entry:
Pause storage on fire
Resume storage on OK
The Timeout value
Upper and/or Lower Limit
The applicable Node
The applicable Computation. If the priority computation is selected the alert display is automatically updated when the steered node changes
The applicable Waypoint. When the waypoint changes the alert display is automatically updated with this information.
For comparisons:
The applicable System
The applicable Node
The compare method.
Dredging Results Alerts
Various parameters require selection or value entry:
Design state:
Above Design - Dredge head is located above selected design.
On Target - Dredge head is located on selected design.
Over Dredge - Dredge head is located beneath selected design.
Not Used - No design selected or grid data is not available.
Intrusion Detection Error (Emergency Hoist):
If the horizontal distance or the vertical distance between the avoidance object and the dredgehead are smaller than the entered distance, the Intrusion Detection Error Alert is raised.
Usually a Warning corridor is set first to indicate that you are nearing the Error corridor.
OK - No cables or pipe lines within range of dredge head.
Hoist - Dredge head is within range of cables and / or pipe lines. The dredge head is automatically be hoisted (depending on the interface with QINSy) or must be hoisted manually.
Not Used - Intrusion Detection Error is disabled.
Poor Mixture Overboard (PMO):
OK - Mixture is OK.
Spilling - Mixture is not OK, PMO valve is open.
Intrusion Detection Warning:
If the horizontal distance between the avoidance object and the dredgehead is smaller than the entered distance, the Intrusion Detection Warning Alert is raised. Usually the Warning corridor is set around the Error corridor.
Pressing the View Properties button opens this dialog:
After set up the dialog might look similar to this:
In this example:
Rotation of the backhoe is limited to +100 deg. and -100 deg, with zero being straight ahead.
The Trimble positioning system has dropped out of RTK Fixed mode.
The bucket is above the design depth and no intrusion alerts are raised.
Create a Navigation Display to visualize 2D positioning of one or more objects superimposed on background imagery, including ENCs, ECW files, CAD/GIS files, Line files and Sounding Grids. Many functions are straight forward and do not need explaining in a Quickstart. A few less obvious functions are briefly addressed.
The main functions are all available from the toolbars:
Toolbar
Description
Direct access to each of the individual layers (see below). Note that View Properties also opens the same layers dialog box.
Quick re-scaling of the display to user-defined precise scales. Click on the button to enter a preset scale for each alphabet character.
The usual tools for navigating around the display.
The Main toolbar provides various tools:
Pick Report - provides information about the ENC.
Range and Bearing measurement - click once at the location from which measurements originate. A range circle and direction line are displayed.
Geodetic Computation - The coordinates of a mouse-picked location are shown together with the distance along the active mainline (KP) and the offset from that line (DX). The location is shown in the Navigation screen as a small yellow marker:
Range Markers - range and bearing indicators between user selected points.
Waypoint Planning - creation of points, lines, polylines and areas in the display window itself.
Anchor Planning - drag and drop of planned and dropped anchor locations.
Target Selection - drag and drop of ARPA/AIS targets.
Favorite displays. You can create and store particular views and quickly revert to any one of them using these tools.
Vessel tracking button. When active all objects designated to be tracked are kept in view; the display re-scales automatically. When inactive, you are free to move the focus of the display to anywhere and/or zoom in and out without automatic re-scaling.
To set up the display click on the View Properties toolbar icon .
This dialog opens:
The image below shows a summary of all the buttons available in the left pane. View, Layers and Objects are the main buttons, each with a number of secondary buttons. Setting up the display is simply a matter of working from top to bottom.
BHD - Navigation Display provides more details about the setup as it pertains to dredging. Refer to the Help pages for complete descriptions of all these primary and secondary buttons.
The Profile Display provides a slice view of the dredger Objects and Terrains (e.g. sounding grid) displayed from four different angles (starboard, port, aft and front).
IMPORTANT: In order to display objects in the profile display at least a longitudinal profile through the CoG of the vessel is required. A lateral profile supports Aft and Front viewing options. These profiles are defined in the Database Setup program when creating Object Shapes.
As the Profile Display opens the program reads the active layer of the sounding grid and the design layer as set under Session Setup - Dredging - Design.
So the initial display may look something like this:
Of course the display can be customized.
Click on the View Properties task bar button .
Note that options in the Select menu open the same dialog as does the View Properties option.
As with other displays, primary and secondary buttons are shown in the left pane.
Work your way from top to bottom. These are the options:
Parameters associated with Setup, Scales and Grid are all fairly self-explanatory.
Setup
Relative motion
When Relative Motion is on, the object remains in the center of the display; only the terrain, e.g. sounding grid, moves. When Relative Motion is off, the terrain is stationary and the vessel moves across the display and may disappear.
Object tracking
Option only available when Relative motion has been activated. But the Object Tracking button in the toolbar can be used at all times while on-line. When Object Tracking is on, the object sails to the edge of the display and is then placed back in the middle of it. When Object Tracking is off, the terrain is stationary and the vessel moves across and off the display. When the vessel has sailed outside the display and you can not find it with the zoom functions, turn Object Tracking on to retrieve it.
Orientation
The object can be viewed relative to a line heading or to the heading of any of the calculated objects/nodes.
Origin
This is the side from which the object is viewed, projected onto the line if Orientation was set relative to a line heading.
Scales
Scaled Display
When enabled this option scales the display while maintaining the aspect ratio. By entering a new vertical scale the horizontal scale changes to maintain the aspect ratio.
When disabled scales are set manually.
Scale Objects
When Scaled Display is disabled Objects are scaled on one axis or both axes:
Both Axes -
The Object is scaled according to the scales set for both the vertical and the horizontal legends, i.e. the object can be stretched in either direction.
Horizontal Axis -
The Object maintains its true aspect ratio but is scaled according to the scale of the horizontal legend. The vertical is scaled according to the values entered. Enter a wide range for the horizontal axis and the object becomes smaller.
Vertical Axis -
The Object maintains its true aspect ratio but is scaled according to the scale of the vertical legend. The horizontal is scaled according to the values entered. Enter a wide range for the vertical axis and the object becomes smaller.
Zoomlock vertical or horizontal range
Locks the vertical or horizontal range so it will not change when zooming in or out.
Use line as reference
Selected to show object relative to a line. KP values are shown at the horizontal axis instead of distances in meters.
Line
Choose an existing line from the drop down menu. Different mainlines can be selected, but need to have been activated in the Session Setup - Planning first. These Additional mainlines were defined in the program Line Data Manager or in the online Navigation Screen with the button named Waypoint planning.
Left/Right
The range shown to the left and right of the center of the display. The center of the display corresponds to the reference point of the active object.
This opens the View Properties dialog with the focus on the Objects button.
Select which Object to use as the Reference Object for the display.
Select a Node on that Object and the Computation in which the node coordinates are calculated. Using this Object a longitudinal or a cross profile is drawn with the selected Node in the center of the screen.
The Objects are displayed in the reverse order that they are added, i.e. the bottom one in the list is displayed on top of earlier entries.
Set up legend Symbols and Colors for each of the Objects.
Multiple symbols may be shown at one time. Symbols along the Horizontal and Vertical Legends point to the selected Node. All other available Objects are drawn around this Object and Node.
In our example, indicator Symbols along the Horizontal and Vertical Legends are used to indicate the location of the selected Node for each Object.
Click here to expand...
Properties
Object
Color
Select a color for the object highlighted in the panel above.
Fill object shape
Select if you want to fill in the object shape with its set color.
Show legend indicators
Small indicator symbols in the legend indicate the horizontal and vertical positions of the object in the Profile Display.
Horizontal legend
When switched on the following parameters are shown:
Symbol
The selected symbol is placed at the bottom of the display indicating the horizontal position of the object.
Use large symbol
For ease of recognition.
Use object color
Switched on: use the color as set for the object above. Switched off: select a color in the line below.
Color
Select a color for the legend indicator symbol.
Vertical legend
When switched on the following parameters are shown:
Symbol
The selected symbol is placed at the right side of the display indicating the vertical position of the object.
Use large symbol
For ease of recognition.
Use object color
Switched on: use the color as set for the object above. Switched off: select a color in the line below.
Color
Select a color for the legend indicator symbol.
Dredging Object
This option is only visible when a dredging object is highlighted in the top panel of the screen.
Show dredge head at deepest
Choose to show the dredge tool at its deepest point.
Color
Select a color for the dredge tool at its deepest point, if activated.
Fill dredge head at deepest
Fill dredge tool with the selected color at its deepest point.
Show dredge head cutting point
Show where the dredge tool cuts the design. A dot is placed at the exact point.
Color
Select a color for the dredge tool where it cuts the design.
Fill dredge head cutting point
Fill dredge tool with the selected color at its cutting point.
By default the first layer defined in the active Sounding Grid is loaded as a Terrain. So too is the Design Model if it has been defined as a layer and contains data.
If further Terrains are required, the following terrain types are supported:
Sounding Grid - Select the sounding grid to use from the standard Windows browse dialog. Then select the correct layer in the next column. If a sounding grid was selected in the 'Controller's Session Setup - Storage', the first defined layer will automatically be shown here, named Sounding Grid <Storage>. When Under and Over Dredge Tolerances are used, these are also shown. If necessary remove the sounding grid chosen in the Session Setup here by using the button.
Echosounder - Single observations from echosounders can be displayed in real-time. This enables you to analyze the depth readings in comparison to a previously created terrain. When selecting a Multibeam system, the swath must be set. Using direction starboard or port, the readings will show as a measured Terrain when drawn as lines.
Safety Line - It is possible to add a nominal safety line. A line is displayed at the manually entered depth (in survey units). This line can be used in case no design is available and a depth needs to be displayed.
QPD Processing - Select *.qpd processed files. Multiple files can be selected.
QINSy Mapping - Select a *.pro file. (This is the old format. It can still be used, but will be phased out. Use the *.qgf format instead.) It is only possible to select one file at a time, but you can add more.
QGF Design Model -Select a *.qgf file. (This is the new QPS CAD format.)
Safety Line <Design> - This line was designed in the Dredging Design dialog when Design Method was set to Manual Depth. A Storage - Sounding Grid does need to be set to show this line.
Sounding Grid<Design> - If a sounding grid with a design layer was selected in the Controller's Session Setup - Dredging - Design it will be shown here.
Sounding Grid <Storage> - If a sounding grid was selected in the 'Controller's Session Setup - Storage' it will automatically be shown here.
Water Level - Mean Actual Water Level, i.e. water surface, is shown.
Additional Terrain <Session> - A terrain from the Controller's Session Setup menu 'Additional Terrains' can be selected here.
The Terrains are displayed in the reverse order that they are added, i.e. the bottom one in the list is displayed on top of earlier entries.
Other settings are cosmetic and self-explanatory, except perhaps the fill type Color Banding.
Color banding - Only available when the layer type is Sounding Grid. Depths in the Profile Display are shown in their own color ranges, similar to depths in a sounding grid shown in the Navigation Display.
Measurements are calculated from a node to a profile; they are not raw measurements.
Add a Measurement, select an Object Node and Computation, and then the Terrain to which the measurement is made. Enter the properties of each Measurement added.
The current active survey line is listed as well as any additional mainlines defined and activated in Session Setup - Planning. Adjust the properties for each line separately in the Properties pane.
Similar to Objects, the position of the selected line can be shown using indicators (an open dot). The line can only be seen when sailing perpendicular to it. Use Settings - Origin - Front/Aft/Starboard/Port to get it in view. When the line has not been given a height, it will be shown at 0 meters.
Sounding Grid
If a Sounding Grid is used as a Terrain, enter parameter values and make selections to determine how to show it.
The Generic Display is enormously powerful in that it can display virtually every parameter used in software with design of the layout completely in the hands of the operator.
This display is intended to replace the Alphanumeric Display.
When first created an empty dialog pops up. Click on the toolbar icon.
This opens the Generic Layout Editor focused, by default, on the Display secondary button located under the primary Overview button. Enter values and make selections.
To begin with, click on the Setup primary button.
You will come back to the Overview primary button when some or all items have been added. Work your way from top to bottom selecting each of the secondary buttons as they appear under the primary buttons.
These are all the buttons available:
To illustrate the process of selecting items you want shown in the final display take the example:
Observation System secondary button under the Raw Data primary button.
Click on . This adds an initially undefined system under System Obs Parent Items.
For that Parent Item choose a System and an Observation.
Under Available Sub Items double click on any of the sub-items you want to appear in the display.
They are added to the Selected Sub Item list.
Click on each Selected Sub Item and modify its Properties as necessary.
Work through all the primary and secondary buttons adding Items and Sub Items you want displayed. Finally return to the Layout secondary button under the Overview primary button.
All the items are listed in the order they were added.
Items can be moved around within the main Generic Display dialog by mouse. The next image illustrates what happens when you click on an Item, in this case Survey Datum Name, and drag to another location; the whole block of text below this item is also picked up and moved.
This means you have to separate blocks of text. Repeating the process is illustrated in the next image where Draft Fore Value was clicked and the block of text below was moved with it as the mouse was dragged to the left.
Of course the idea is to move items around so related data are clustered. In order to accomplish this you may have to separate individual items so each can be moved independently. Once an item is isolated from other items it can be moved individually from then on, even when positioned right under another item.
As an example the display could end up with the layout shown in the next image (after deleting some items and adding others).
Next it might be useful to highlight certain items with larger text and/or different colors. Using the right click menu select Display Properties. Modify one or more of the parameter values and notice that the changes apply to all items in the dialog.
In order to change individual items, either double-click on the item, or right click on the item and select Layout from the menu. Each method takes you to the appropriate page of the Layout Editor.
In the item Properties pane, modify any one or more properties.
The Display and More Properties parameters offer the following options:
If User Defined is selected under More Properties, you can click on the button which opens the User Defined Format Specifiers dialog where all font related items can be changed for the individual item.
Selecting User Defined under Display opens the User Defined Format Specifiers dialog for labeling:
Here you can use predefined specifiers, your own text, spaces and tabs to define the label and position of the item value.
Other Properties to try are Operators and Translations.
The final display could look something like this, although there is probably too much information in this one display.
The 3D Grid Display shows multiple three dimensional objects simultaneously: DTMs, DTM Textures, Static Objects, Water Surface, Range Markers, Cables, Survey Lines, Anchors, and Vessels (pontoon, backhoe, bucket, etc.). Objects are seen moving in real-time updating DTM depths as dredging proceeds, both excavation and dumping.
Orienting the Display
Button
Description
Left button
Hold the left mouse button down. Moving the mouse left and right spins the scene about a pivot point. Moving the mouse up and down rotates the scene vertically about the same pivot point.
Right button
Right click in the scene to set a new pivot point. If the click is on an object the pivot point is located on the object itself. Otherwise the pivot is located on the DTM surface.
Scroll wheel
Zooms in toward and out from the pivot point.
Setup Display
Clicking on any icon in the toolbar....
or clicking on the 3D Objects menu item.... or clicking on the View Properties task bar button ....
...all open the View Properties dialog. Which page of this multi-page dialog depends on which command is selected.
These are all the options:
The best place to start is with Vessels. Once all objects have been enabled and Direct X models assigned, go to Objects. Lastly go to View.
For each Object, decide whether it should be shown. If Yes, select the Computation from which its position is drawn.
Then click on to link the 3D File (*.x) from the standard Windows File Open dialog.
The 3D model can be manipulated as follows:
File offsets
Translation
The origin of the 3D File might not completely match the Reference Point of the vessel, so here it can be shifted in any of the three axes. Leaving the values for Translation and Rotation at zero will result in the visualization of the original 3D File.
Rotation
Sometimes the orientation of the 3D File does not match the orientation used by QINSy. For example, an object may appear rotated 180 degrees. Enter a value in degrees to rotate the model about any of the three axes. For example entering Y=90 rotates the object 90 degrees to starboard. Leaving the values for Translation and Rotation at zero will result in the visualization of the original 3D File.
Scale
It may be necessary to re-scale the object, sometimes because the units used in the original file are not real world units, or to convert meters to feet or vice versa.. Leaving the Scale value at 1 will result in the visualization of the original 3D File.
Under DTM - Additional Terrains select the data to be used to build a 3D Wireframe.
A wireframe model represents the shape of a solid object by its characteristic lines and points.
The currently active Sounding Grid is loaded by default.
Up to 10 Additional Terrains can be loaded - see Controller's Session Setup - Planning.
Alternatively, when no data from the other selected DTM files is available, choose Create Flat Surface DTM which adds an infinite horizontal plane.
In the Settings pane below select one of the layers from the DTM terrains list and set the properties of this layer.
DTM Textures
Click on .
DTM files selected in the DTM page are already visible in this list.
Click the to add a geo-referenced image file (e.g. *.ECW) to drape on the DTM surface. Create Texture Outside DTM adds an infinite horizontal plane where no data from the other selected DTM files is available. This is meant as a visual aid only.
For the sounding grid use these options to set the colors and textures for the selected DTM files.
When Use DTM Settings is checked you are electing to use the same layer and attribute that was set in the DTM dialog.
When unchecked additional options are added to the dialog to allow definition of an alternative Layer, Attribute, and Reference Layer if applicable.
The latter could be the design layer used to show the difference between two layers in a selected color scheme.
There may be a need to display objects within the 3D scene that do not move. For example, offshore structures like wind turbines or pipelines. If 3D models of Static Objects are available, they can be added to the scene.
Click on .
Use the button to add an object.
Select object model Direct X meshes (*.x) and/or *.pro / *.qgf files, i.e. designs created with Terramodel or in the QINSy graphical format.
Make selections under Settings.
Link to
Select whether the object should be linked to:
Manual - a manually entered position, which is entered in the Offsets fields.
Fixed node - this node must be predefined in the Database Setup program.
Waypoint - a predefined point in a Line Database file.
The parameters displayed depend on which 'Link to' option is chosen. In case of Manual enter the coordinate set. In case of a Fixed node, select the fixed node from the drop down list that shows all the fixed nodes defined in the template database. In case of a Waypoint first select the relevant Line Database file and the appropriate waypoint.
Drop on DTM
The Object origin receives the height of the DTM at that location. This overwrites the manually entered Z value. However, if the object origin is not located at the base of the object, it may be necessary to uncheck this box and use Offsets to place the bottom of the object on the DTM surface.
Offsets
These values shift the *.x file relative to the selected location, or they set the absolute position when Link To is set to 'Manual'.
Rotation
The object is rotated around its own pivot point.
Scale
The object can be re-scaled if the original model is not created in real world coordinates. Using only Z scaling a vertical exaggeration of the scale is possible.
Choose whether to show a water surface and define how the water plane is set up.
Select either a Horizontal Plane or a Boundary. The Boundary option uses a DTM from a *.PRO / *.QGF file. For the Boundary option use the browse button to select the *.PRO / *.QGF file which contains the DTM.
Note that in the Line Db file, you must use the DTM Link check box in order to create a proper DTM file.
The height of the Water Plane is determined by either a Manually entered height relative to Vertical Datum or by an Object height. In the latter case link the Water Plane to the height of the reference point of a selected object. The plane can be offset if that point is not at water level.
Make visible any Lines set in Controller-Settings-Session Setup-Line Planning.
Line heights are the same as those heights entered for each line when creating the Line Database file in the Processing Manager or Line Database Manager.
A Range Marker is a line between two selected points drawn with or without a label which indicates the range and bearing of the line, plus the height difference between the two points.
Click on .
Click on to create a new marker.
Label content depends on the Setup selection made, as depicted in the following image.
Select which Type of marker and then make the appropriate selections.
Setup
Description
Range marker between two nodes on different objects. This type could be used to show the distance between two vessels. Type A label.
Range marker between a node on a vessel and a fixed node as defined in the Database Setup. Type A label.
Vertical marker between a node on a vessel and the sounding grid DTM below. Type B label.
Vertical marker between a node on a vessel and the water plane as defined under option 'Water' above. Type B label.
Range marker between a node on a vessel and a predefined point in a Line Database File. Type A label.
Range marker between a node on a vessel and the location at which the left mouse button is clicked in the display. A new label is generated at each mouse click. Type A label.
Range marker between an anchor wire and a selected waypoint. Not applicable to Backhoe dredging. This option enables the monitoring of the separation between an anchor wire and any potentially hazardous object. Label shows the range between the wire and waypoint, plus the height separation value.
Height Aiding means to 'aid' the computation of the 'height' of a node position by adding an additional 'height aiding' observation to the adjustment in which the node position is determined. All the resulting heights are still given with respect to the survey datum that has been selected in the Database Setup program.
The Height Aiding Driver Display is launched automatically when the Controller is started. It is useful to check the height aiding components of the various nodes to make sure they are as expected. You cannot close the display so, once values are checked, you are advised to minimize the window to gain screen space.
All the height component values are positive upwards, which means that positive bathy depths are displayed as negative heights. 'N/A' means either Not Applicable or Not Available.
Column
Description
System
System name in case of height aiding observations (black text) and Object name in case of object heights (blue text).
Height Node
Height Node is just a short description for Height Aiding Observation at Object Node. Height aiding observations are computed by the Height Aiding Driver for:
positioning systems and satellite systems that have unreliable heights.
bathymetric depth and pressure observations.
the ‘to node’ with manual layback observations.
Height
Height above Survey Datum, or height above WGS84 Datum in case raw GNSS data are interfaced.
Z Offset
Offset of the node relative to the CoG; for example the node offset of a GNSS antenna or bathymetric sensor.
Attitude
Correction to Z offset to account for pitch and roll according to object attitude priority.
Heave
Heave component according to object height priority.
Squat
Squat component according to object height settings.
Draft
Draft component according to object height settings.
Delta
Delta Height is the height difference between an accurate height, e.g. from RTK and an unreliable height computed using database settings such as the Mean Water Level Model and object height settings as defined in the Computation Setup. Delta Height usually corresponds to a water level correction, i.e. an unknown tide value and/or an inaccurate geoid model height, but it also includes offset errors, attitude errors, ROV depth errors, and/or datum shift errors. Delta Height value can be used to determine a tide value from RTK heights.
Tide
Tide height according to object height settings.
MWLM
Mean Water Level Model height according to Geodetic settings in the template database. In case only a geoid model is selected in the database, this corresponds to Mean Sea Level height.
Depth
Bathymetric depth (or converted pressure) according to computation settings.
SD
1-sigma Standard Deviation of the Height Aiding Observation computed from object settings and component observation SD's.
The object heights are computed for the object Reference Point in order to transfer height differences between objects and computations and in order to transfer object height components to other QINSy modules. The delta height has been implemented in order to be able to combine accurate RTK heights on vessels with bathy depths on towed fish objects, in case accurate tide values (or geoid heights) are not available. More information on the various height component settings can be found on the Help pages of the Database Setup program (Geodetic Parameters, Object Definition) and the Contoller's Computation Setup.
Option
Description
Show
Select type of information to show. In release mode, three options are available: Objects only, no heights - Object heights for reference nodes are shown but no height aiding observations. Objects, active heights - Object heights (blue text) and height aiding observations (black text) are shown. Active heights only - Height aiding observations that are active in at least one computation are shown.
Datum
Select Datum for heights. Currently only the computation datum is available. Survey Datum - Computation datum in case no raw GNSS system has been interfaced. WGS84 - Computation datum in case raw GNSS pseudo-ranges are received.
Unit
Select Unit for height values. Currently only the survey unit is available. Survey Unit - Height unit as defined on Page 1 of the Geodetic wizard in the template database.
