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This adjustable time period is called the Follow Time, and can be configured in the Timeshare Group settings. There is a Min. Follow Time and a Max. Follow Time.
Below are a series of examples of how cameras assigned to the Timeshare mode, or in a Timeshare Group, can monitor Tracks.
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Timeshare Group Settings
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Group Type: The type of camera group; in this case Timeshare camera group.
User ID: A user friendly ID.
Name: The name allocated to the camera group.
Enabled: The option to enable this group, which is selected by default.
Use Priority: This controls which targets are selected to be followed, and some examples are shown in the Priority section: https://navtechradar.atlassian.net/wiki/spaces/TUN/pages/501579784/Timeshare#Priority.
Target Expiry Time: This specifies how long a target will be kept alive whilst the system waits for an update.
Min Follow Time: The minimum length of time spent following targets before looking for another suitable target to follow.
Max Follow Time: The maximum length of time spent following targets before looking for another suitable target to follow.
Classification: Select what type of targets should be followed. By default this is set to all classification models.
Priority: Select the priority level to restrict all cameras in the Timeshare Group to only follow targets of the selected priority or higher. Any targets of a lower priority will be ignored. By default this is set to High.
Camera Coast: Select this option if you want the camera to continue to follow in the target’s last known direction when it is no longer being tracked.
Coasts Allowed: How many times the camera should follow a coasted track before giving up.
Minimum Sightings: The minimum number of sightings a target should have before it is followed by a camera.
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Priority is set as part of the alarm configuration. Please refer to https://navtechradar.atlassian.net/wiki/spaces/TUN/pages/307232849/General#Alarm-Settings for ClearWay™ and Rules for AdvanceGuard® alarm configuration. |
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Default
Single Camera:
Each Track track is viewed for the Follow Time, before the Camera camera switches to the next Track. e.g. 10 seconds.
The Tracks tracks are viewed in order of their age: from oldest to youngest, and then cyclically. Age is defined by how long the Tracks tracks have been inside the Detection Area.
As Tracks tracks move in and out of the Detection Area, the age and therefore the order of Track track viewings will change.
The Cameracamera's views are labelled numerically in order of viewing.
If a Track track leaves the Detection Area, and then rejoins the Detection Area, its age will be refreshed.
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Double Cameras:
Each Track track is viewed for the Follow Time, before the camera switches to the next Tracktrack. e.g. 10 seconds.
The Tracks tracks are viewed in order of their age: from oldest to youngest, and then cyclically. Age is defined by how long the Tracks tracks have been inside the Detection Area.
As Tracks tracks move in and out of the Detection Area, the age and therefore the order of Track track viewings will change.
The Camerascameras' views are labelled numerically in order of viewing e.g. 1 for 10 seconds, 2 for 10 seconds, 3 for 10 seconds, 1 for 10 seconds etc.
As each Camera camera is in a separate group, they will both perform the same actions, regardless of different Camera camera positions.
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Double Cameras, Single Group
Each Track track is viewed for the Follow Time, before the Camera camera switches to the next Tracktrack. e.g. 10 seconds.
The Tracks tracks are viewed in order of their age: from oldest to youngest, and then cyclically. Age is defined by how long the Tracks tracks have been inside the Detection Area.
The Cameras' views are labelled numerically in order of tracking.
As both Cameras cameras are in the same group, they will not view the same Track track simultaneously. Instead, each Camera camera will view Tracks tracks in order of age and Track track availability:
Camera 1 views the oldest Track track (green),
So Camera 2 views the second oldest (aqua).
When the Follow Time ends, Camera 1 will switch to viewing the next oldest Tracktrack: the third oldest (blue).
So Camera 2 will switch to the fourth oldest (indigo).
This 'alternate Tracktrack' cycle will continue unless a Track track or Tracks tracks move in or out of the Detection Area.
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Priority
Double Cameras, Single Group
Each Track track is viewed for the Follow Time, before the Camera camera switches to the next Tracktrack. e.g. 10 seconds.
When a Detection Area is given Priority, only Tracks tracks within the Priority Area (red) will be viewed.
The Tracks tracks are viewed in order of their age: from oldest to youngest, and then cyclically. Age is defined by how long the Tracks tracks have been inside the Priority Detection Area.
The Camerascameras' views are labelled numerically in order of track viewing.
As both Cameras cameras are in the same group, they will not view the same Track track simultaneously. Instead, each Camera camera will view in order of age and Track track availability.
In this example, there are three Tracks tracks to be tracked by two Camerascameras, so the Tracks tracks cannot be evenly distributed between the two Camerascameras. Therefore:
Camera 1 tracks the oldest Track track (green), so Camera 2 views the second oldest (blue).
When the Follow Time ends, Camera 1 will switch to viewing the second oldest Track track (blue), so Camera 2 will switch to the third oldest (indigo).
When the Follow Time ends, Camera 1 will switch to viewing the third oldest Track track (indigo), so Camera 2 will switch back to the oldest (green).
This 'every two Trackstracks' cycle will continue unless a Track track or Tracks tracks move in or out of the Detection Area.
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Mixed Camera Modes
Mixed
As above, the Timeshare Camera camera views each Track track for a defined amount of time, before the Camera camera switches to the next Tracktrack. e.g. 10 seconds.
The Tracks tracks are viewed in order of their age: from oldest to youngest, and then cyclically. Age is defined by how long the Tracks tracks have been inside the Detection Area.
The Timeshare Camera camera's views are labelled numerically in order of track viewing.
However, whilst the youngest Track track (purple) is the last to be viewed by the Timeshare Camera camera, it is continuously viewed by the Closest camera due its proximity.
You cannot put two Camera's cameras with different modes in the same group.
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Mixed Priority
As above, the Timeshare Camera camera views each Track track for a defined amount of time, before the Camera camera switches to the next Tracktrack. e.g. 10 seconds.
When a Detection Area is given Priority, only Tracks tracks within the Priority Area (red) will be viewed.
The Tracks tracks are viewed in order of their age: from oldest to youngest, and then cyclically. Age is defined by how long the Tracks tracks have been inside the Priority Detection Area.
The Timeshare Camera camera's views are labelled numerically in order of track viewing.
However, whilst the youngest Track track in the Priority Detection Area (indigo) is the last to be viewed by the Timeshare camera, it is continuously viewed by the Closest camera due its proximity.
You cannot put two Cameracamera's with different modes in the same group.
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