Introduction

This section covers ATI, Lost and Track Queries on the Playback Tab.

Contents

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: 

Id: A unique identifier for each track.

Min. Sightings: The 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.

Open

False Alarm Probability: This enables you to filter by false alarm probability. Toggle the 🛇, ≤ and ≥ buttons to define the value.

Classification Filter: Enables you to filter by one or more track classification types. Just click the required types to highlight them or deselect all to remove the filter. Classification options are:

Person

Vehicle

Large Vehicle

Debris

Animal

Drone

Aeroplane

Boat

Unclassified

Travelled (m): How far the tracks have travelled. Toggle the 🛇, ≤ and ≥ buttons to define the value.

Open

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.

Lost: Select to include Lost tracks in the query.

Tag Preset: A text search for https://navtechradar.atlassian.net/wiki/spaces/TUN/pages/1435500563.

Tag Presets: This will show a drop-down list with Tag Presets which have been configured in System Settings.

Areas: Select a detection area.

Rules: You may select one or more rules to filter tracks that have broken the selected rules.

Radars: Enables you to filter tracks based on the radar that generated them.

Analysis Status:  The status of the recorded track. Once a track has been recorded, retrospectively a status can be applied to help categorise the track, for example it could be labelled as a genuine alarm or a nuisance alarm. This filter allows you to find tracks based on this labelling.

Any

System

False Alarm

Confirmed Alarm

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:

Select: Select the tracks you wish to focus on.

Classification: The type of track.

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. 

Tag Preset: If a tag has been associated with the live track then it will be listed. https://navtechradar.atlassian.net/wiki/spaces/TUN/pages/1435500563

Show: Select the main column option for all of the tracks to appear on the PPI Display. Alternatively, select the Show option next to each track you wish to view. They will appear on the PPI Display, like this example below:

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.

Video Playback: Select the Play Video icon to play back the Videoloft video. This requires the Videoloft Plugin to be enabled and configured. Please refer here: https://navtechradar.atlassian.net/wiki/spaces/TUN/pages/2305163265.

Status: Change the status to draw specific attention to the track, and save from default track data culling.

Track Correlation: This feature searches for previous tracks that have been marked as lost, which are likely to be associated with the selected track. If the system detects such a correlated track, it will highlight it.

On the top left of the Track Query panel there are the following icons to be used with selected tracks:

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 for further details.

Export: Export the track records for posterity.

Analyse: An option to analyse the selected tracks. If selected then the Tracks Analysis panel will be displayed.

Status: Change the status to draw specific attention to the track(s), and save from default track data culling. This will open the Set System Status panel.

Tracks Analysis Panel

This shows an analysis of all of the selected tracks:

Min/Max Date: The earliest and latest dates for the selected tracks.

Min/Max Range: The minimum, maximum and average distance of sighting from the radar for the selected tracks.

Sightings: The minimum, maximum and average number of sightings of the selected tracks.

Speed: The minimum, maximum and average speed of the selected tracks.

Strength: The minimum, maximum and average radar signal strength for the selected tracks.

Weight: The minimum, maximum and average weight for the selected tracks.

Size: The minimum, maximum and average size for the selected tracks.

Area Covered: The minimum, maximum and average value of how far the selected tracks have travelled, either horizontally or vertically along the x/y-axis.

Travelled: The minimum, maximum and average value of how far the tracks have travelled.

Coasts: The minimum, maximum and average number of coasts (assumed sightings) for the selected tracks.

Set Analysis Status Panel

This allows the operator to apply an Analysis Status to all of the selected tracks:

Analysis Status:

System

False Alarm

Confirmed Alarm

Archive

Track Details 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 (Recorded): 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 All Details: When selected this option will display more data the Track Details table:

Deletion Reason: The reason the track was dropped and deleted.

Area Covered (m): How far the track has travelled, either horizontally or vertically along the x/y-axis.

Travelled (m): How far the track has travelled.

Max Area Size (m²): The maximum area that the track has travelled.

ML Classified: If the ML Classification feature has been enabled in the Track Engine configuration, then this will be selected.

False Alarm Probability Min: The system calculates a false alarm minimum probability score for each track.

False Alarm Probability Max: The system calculates a false alarm maximum probability score for each track.

Tag Preset: If a tag has been associated with the live track then it will be listed.

At the bottom of the panel there are the following options:

OK: Closes the Track Details panel.

Clone Track: create a Playback Track from selected track.

Add Track: Select this option to create an ML Truth Track from the recorded Track. It will open an Add Truth Data panel: .

Play Video: This will play the recorded video of the track. This requires the Videoloft Plugin to be enabled and configured. Please refer here: .

Locate: This option will pinpoint the track on the PPI.

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.

Recorded Time: The time and date of each sighting. 

Speed: The speed of that track per sighting. 

Course: The direction of travel per sighting. 

Range (m): Distance of sighting from radar.

Classification: The type of track.

Reclassifying: This will be selected if the track sighting has been reclassified.

Alt (m): Altitude of the track for each sighting.

Area Size (m²): The area covered by the track for each sighting.

Weight: The total number of cells that make up the target for each sighting.

Strength: The radar signal strength for a target, for each sighting.

Adjusted Weight: The total number of cells that make up the track sighting, taking into account cell beam-width increase over range.

Adjusted Strength: The sum of the signal strength for each cell which makes up the track sighting, taking into account cell beam-width increase over range.

False Alarm Probability: The system calculates a false alarm probability score for each track sighting.

Coasting: Specifies if ticked which sightings were Coasting (assumed) sightings. 

Statistics

This table displays the following graphs;

Speed (m/s): The speed of that track per sighting. 

Size: The surface area of the target, calculated using size in range x size in azimuth, per sighting.

Weight: The total number of cells that make up the target for each sighting.

Strength: The radar signal strength for a target, for each sighting.

These graphs can be ordered by:

Sighting: The order by which the track sightings were detected.

Range: Distance of sighting from the radar. This option has a sliding scale, which will adjust the graphs accordingly.

Classification

This is explained in .

Add Truth Data

Clicking on the Add Track button will open an Add Truth Data panel.

This is used within the ML (Machine Learning) Classification feature which uses the first 10 sightings of a track in order to identify the classification of that track.

You can correct the classification of a track, and this will add to our track models which make predictions about future tracks.

Please refer to for more information about this feature.

Classification: Select the correct classification for the truth data track.

Description: A description of the example data track must be added. For example, this could be the reclassification of the track or where it was seen.

Debris: Indicates if the truth data has come from the debris channel.

First Sighting: Sets the first sighting to be used for the truth data. This allows you to ignore the first part of the track if its not useful to be included as part of the truth data.

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