Introduction
Track Query
This query filters tracks through every possible variation, in order to select and display a specific quota of tracks (within the time period and record limitations). The track pathways appear as a white line on the PPI, but multiple tracks can be multi-coloured to differentiate them. The variables are decided by the following categories:
Min. Sightings: minimum number of sightings a track requires before it is recorded as a track. Toggle the 🛇, ≤ and ≥ buttons to define the value.
Min. Speed: the minimum speed value, either a maximum, minimum or equal to value. Toggle the 🛇, ≤, ≥, =, ≠, ⪥, and <> buttons to define the value.
Max. Speed: the maximum speed value, either a maximum, minimum or equal to value. Toggle the 🛇, ≤, ≥, =, ≠, ⪥, and <> buttons to define the value.
Classification: type of moving object:
a. Any
b. Unclassified
c. Vehicle
d. Person
e. Debris
f. Aeroplane
g. Boat
h. Large Vehicle
i. Animal
Travelled (m): how far the tracks have travelled. Toggle the 🛇, ≤ and ≥ buttons to define the value.
Area Covered (m): how far the track has travelled, either horizontally or vertically along the x/y-axis. Toggle the 🛇, ≤ and ≥ buttons to define the value. Whether the value is measured on the x or y-axis depends on which is the larger 'distance'. In the examples below, the Area Covered is defined first by the distance travelled along the x-axis, and second by the distance travelled up the y-axis.
For distance Travelled, it is a minimum value. The results will return tracks any value larger, any values further from zero, whether negative or positive. e.g. Travelled (m): 6 would return 7, 8, 9... and - 6 would return - 7, - 8, - 9...
For Area Covered, it is a maximum value. The results will return tracks of every distance value between a positive, or negative, value and zero. e.g. Area Covered (m): 6 would return 5, 4, 3... and - 6 would return - 5, - 4, - 3..
Lost: select to include Lost tracks in the query.
Areas: select a detection area.
Rules: you may select multiple rules to query at once.
Radars: select a specific radar
Analysis Status:
a. Any
b. System
c. False Alarm
d. Confirmed Alarm
e. Archive
Results: how many results the query has returned.
Results
The results of a Track Query are displayed as a list in the Results Panel:
Id: unique alphanumeric identification assigned to each track.
First/Last Sighting: date and time of when the track record begins and ends.
Duration: track length in time to the nearest second.
Seen: number of sightings of the track. Given the radar rotates four times a second, the number of sightings should be roughly equivalent to x4 the track duration (if the track does not coast.)
Coasts Ratio: value that determines how much of the track period was classed as coasting.
Classification: the type of track.
Show: select this box for the track to appear on the PPI Display. Select the box next to the Show title for all the tracks in the query to appear on the PPI Display.
The selected track appears thicker and its direction is emphasised by a continuous pattern of arrows.
Locate: select this icon to shift the PPI Display and until the selected track's location is visible and zoomed in on.
History: select this icon to open the Track Details window. The Track Details window contains two tabs: Sightings and Classification.
Sightings: this table lists every sighting of the track that makes up the track pathway. Select Show All Details to expand the table columns. Each table column title can be selected to re-arrange the order of the sightings e.g. select Range (m) to order the tracks by their Range value. If the sighting has an alarm icon, a red circle, click on the sighting to reveal the rule(s) this sighting broke. If the track has Show selected and is visible on the PPI Display, individual sightings can be selected and highlighted within the track pathway.
a. Recorded Time: the time and date of each sighting.
i. Speed: the speed of that track per sighting.
ii. Course: the direction of travel per sighting.
iii. Range (m): distance of sighting from radar.
iv. Coasting: specifies if ticked which sightings were Coasting (assumed) sightings.
Classification: this tab is explained under Classification Configs.
Clone Track: create a Playback Track from selected track.
There is a limit to cloning Playback Tracks from track histories: only tracks with fewer than 200 sightings can be cloned.
Export: export track record for posterity.
Create Exclusion: creates an Exclusion Area around the selected track's area covered. Unlike a normal Exclusion Area, tracks can recorded and followed through the Track Query Exclusion Area, but all alarms within the Area are suppressed. Therefore the Area is an exclusion zone for alarms. See Exclusion Areas for further detail.
Status: change the status to draw specific attention to the track, and save from default track data culling.
ATI
This query searches through the Automatic Track Initiation data, which concerns how tracks are acquired. The results display the start point of the tracks pathways - the point at which tracks are first detected, within the time period and record limitations. The ATI points are displayed as coloured squares. The variables are decided by the following categories:
Min. Sightings: the minimum number of sightings a track is required to have been seen to be included in the query - loosely equivalent to track length.
Classification: the type of track.
Areas: specify the area(s) you wish to query. Do not specify if you wish to query all.
Colour: specify the colour the ATI points will appear on the PPI Display.
Lost
This query searches through 'blind spot' data, which concerns tracks that are lost within the detection area. The results display the end point of the tracks pathways that finish before they leave the area of detection, within the time period and record limitations. The Lost points are displayed as squares. The variables are decided by the following categories:
Min. Sightings: the minimum number of sightings a track is required to have been seen to be included in the query - loosely equivalent to track length.
Classification: the type of track.
Areas: specify the area(s) you wish to query. Do not specify if you wish to query all.
Colour: specify the colour the Lost tracks points appear on the PPI Display.
Related Information
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AdvanceGuard® (Witness 4.0)
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FAQs (Witness 4.0)
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Trebuchet Launcher (Witness 4.0)
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Live (Witness 4.0)
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Playback (Witness 4.0)