tracking radar
Post on 04-Jun-2018
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INTRODUCTION
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What is a RADAR
TRACKER?A radar trackeris a component of a radarsystem, or an associated command and control(C2) system, that associates consecutive radar
observations of the same target into tracks. It isparticularly useful when the radar system isreporting data from several different targetsorwhen it is necessary to combine the data from
several different radars or other sensors.
http://en.wikipedia.org/wiki/Radarhttp://en.wikipedia.org/wiki/Track_(navigation)http://en.wikipedia.org/wiki/Targetshttp://en.wikipedia.org/wiki/Targetshttp://en.wikipedia.org/wiki/Track_(navigation)http://en.wikipedia.org/wiki/Radar -
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one that follows automatically a single
target so as to determine its trajectory
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What is a Continuous Wave
Radar?
Continuous-wave radaris a type of radar
system where a known stable frequency
continuous-waveradioenergy is transmitted
and then received from any reflecting objects.
Continuous-wave (CW) radar uses Doppler,
which renders the radar immune to
interference from large stationary objects andslow moving clutter.
http://en.wikipedia.org/wiki/Radarhttp://en.wikipedia.org/wiki/Continuous-wavehttp://en.wikipedia.org/wiki/Radiohttp://en.wikipedia.org/wiki/Doppler_radarhttp://en.wikipedia.org/wiki/Clutter_(radar)http://en.wikipedia.org/wiki/Clutter_(radar)http://en.wikipedia.org/wiki/Doppler_radarhttp://en.wikipedia.org/wiki/Radiohttp://en.wikipedia.org/wiki/Continuous-wavehttp://en.wikipedia.org/wiki/Continuous-wavehttp://en.wikipedia.org/wiki/Continuous-wavehttp://en.wikipedia.org/wiki/Radar -
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RADAR TRACKER
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A radar track will typically contain the following
information
Position (in two or three dimensions)
Heading
Speed
Unique track number
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In addition, and depending on the application or
tracker sophistication, the track will also include:
Civilian SSRModes A, C, S information
Military IFFModes 1, 2, 3, 4 and 5 information
Call sign information
Track reliability or uncertainty information
http://en.wikipedia.org/wiki/Secondary_surveillance_radarhttp://en.wikipedia.org/wiki/Identification_Friend_or_Foehttp://en.wikipedia.org/wiki/Identification_Friend_or_Foehttp://en.wikipedia.org/wiki/Secondary_surveillance_radar -
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There are many different mathematical
algorithms used for implementing a radar
tracker, of varying levels of sophistication.
However, they all perform steps similar to the
following every time the radar updates:
Associate a radar plot with an existing track
(plot to track association)
Update the track with this latest plot (track
smoothing)
http://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_tracker -
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Spawn new tracks with any plots that are not
associated with existing tracks (track
initiation)
Delete any tracks that have not been updated,
or predict their new location based on the
previous heading and speed (track
maintenance)
http://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_trackerhttp://en.wikipedia.org/wiki/Radar_tracker -
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Plot to track association
In this step of the processing, the radar trackerseeks to determine which plots should be used toupdate which tracks.
the first step in the process is to update all of theexisting tracks to the current time by predictingtheir new position based on the most recent stateestimate (e.g. position, heading, speed,
acceleration, etc.) and the assumed target motionmodel (e.g. constant velocity, constantacceleration, etc.).
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Track initiation
Track initiation is the process of creating a
new radar track from an unassociated radar
plot. When the tracker is first switched on, all
the initial radar plots are used to create new
tracks, but once the tracker is running, only
those plots that couldn't be used to update an
existing track are used to spawn new tracks.
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Track maintenance
Track maintenance is the process in which adecision is made about whether to end the life ofa track. If a track was not associated with a plot
during the plot to track association phase, thenthere is a chance that the target may no longerexist (for instance, an aircraft may have landed orflown out of radar cover). Alternatively, however,
there is a chance that the radar may have justfailed to see the target at that update, but willfind it again on the next update
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Track smoothing
In this important step, the latest track
prediction is combined with the associated
plot to provide a new, improved estimate of
the target state as well as a revised estimate
of the errors in this prediction. There is a wide
variety of algorithms, of differing complexity
and computational load, that can be used forthis process.
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Alpha-beta tracker
Kalman filter
Multiple hypothesis tracker (MHT) Interacting multiple model (IMM)
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FIELD APPLICATIONS
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MILITARY APPLICATIONS
- They use tracking radars in surveillance
missions and also in missile tracking system
ANIMAL MIGRATION TRACKING
Most commonly used with migrating birds In Wildlife, they use tracking radar to keep track of
endangered species
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