Introduction

These are the settings for the tracker function of the radar. 

Contents

Tracker

Open

Time Constant for Clutter Capture: The clutter map time constant used during the clutter floor capture process. This value is only applied during the capture and the current time constant is restored once the capture is complete.

Disconnect Keep Alive: The amount of time the on-board tracker (on-board only) will stay active after the Track Engine has disconnected. If the Track Engine reconnects within this time, the system will immediately resume operation. If the Track Engine does not connect within this configured time, the on-board tracker will restart and everything will reinitialise when the Track Engine reconnects.

Enable Range Lines: Enables range lines for all visible radar. This feature, when enabled, will draw concentric range circles around all radar. It has these additional settings:

Range Line Distance (m): Specifies how far apart the range lines are. For clarity they should not be less than 10m apart.

Colour: Sets the colour of the range lines. 

Hide Range Limit Lines: By default all radar show their maximum range with a single range circle at the radar’s maximum range. This is hidden when this option enabled, leaving only the radar position marker.

Tracker Health Allowances

The Tracker monitors multiple aspects of its internal operation to provide a status of its current health.  This health is output periodically and can produce alarms if the Tracker is not operating within expected boundaries.

Each aspect of the Tracker's health, (for example, its connection to the radar) is checked against an upper and lower boundary value to determine whether that parameter is within its expected range.  

Alarm allowances refer to the periods of time that can elapse before a change in health status is recorded.  These values allow the health monitoring system to be tuned to minimise false-alarms.

Warn Allowance (s): This defines the time in seconds the parameter must be out-of-range before it is flagged as a Warning. A Warning status does not indicate a failure of the operation of the tracker, but information that the system is operating outside of its expected range.

Alarm Allowance (s): This defines the time in seconds before an out-of-range parameter is set to Unhealthy and is no longer within expected boundaries. An Unhealthy status indicates a failure in the system and should be investigated.

Clear Allowance (s): This defines the time in seconds that a parameter flagged as Warning or Unhealthy must be within expected range again before it is considered Healthy.

Fast Start

Whilst the on-board tracker is waiting for a reconnect, Witness freezes the tracking configuration and keeps it fully operational. This means that when the Track Engine reconnects (assuming its within the specified Disconnect Keep Alive period) the system can immediately resume operation and report any alarms which are already in progress. For example, a vehicle that stopped whilst the Track Engine was disconnected from the radar, will immediately generate an alarm once the Track Engine reconnects. There is no time required to re-initialise the system when it reconnects.

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