:orphan:

.. ****************************************************************************
.. CUI//REL TO USA ONLY
..
.. The Advanced Framework for Simulation, Integration, and Modeling (AFSIM)
..
.. The use, dissemination or disclosure of data in this file is subject to
.. limitation or restriction. See accompanying README and LICENSE for details.
.. ****************************************************************************

.. _MTT:

MTT (Multi-Target Tracker)
--------------------------

.. _MTT.Overview:

Overview
========

The Multi-Target Tracker (MTT) is a tracker produced by Fred Keifer of Bogdon & Associates.  It is the tracker included in mission-level simulation SUPPRESSOR, version 7+.  It was recoded in C and integrated into AFSIM.

.. _MTT.Configuration:

Configuration
=============

The following is a summary of valid inputs for the MTT, along with default values.  If no input is provided for a particular configuration input, the default will be used.  Documentation will be added for these inputs as they become available, as there is currently no detailed reference available for the MTT.  These block inputs must be placed within a :command:`track_manager.tracker_type` block of a :command:`track_manager`, and the :command:`track_manager.tracker_type` must be set to **mtt**.

::

 track_drop_times
    embryonic_track               <time-value> (30.0 s)
    candidate_track               <time-value> (30.0 s)
    active_track                  <time-value> (60.0 s)
    vertical_channel_active_track <time-value> (60.0 s)
    report_delay_for_active_track <time-value> ( 0.0 s)
 end_track_drop_times

 process_model_one_sigma_errors_candidate_track
    x_dir_accel <accel-value> (9.0 m/s2)
    y_dir_accel <accel-value> (9.0 m/s2)
 end_process_model_one_sigma_errors_candidate_track

 process_model_one_sigma_errors_and_parameters_active_track
    x_dir_accel_straight_flight_model <accel-value>    (0.09 m/s2)
    y_dir_accel_straight_flight_model <accel-value>    (0.09 m/s2)
    x_dir_accel_turning_flight_model  <accel-value>    ( 8.0 m/s2)
    y_dir_accel_turning_flight_model  <accel-value>    ( 8.0 m/s2)
    vertical_velocity                 <velocity-value> (6.25 m/s )
    decorrelation_time_vert_velocity  <time-value>     (20.0   s )
 end_process_model_one_sigma_errors_and_parameters_active_track

 one_sigma_state_error_thresholds
    velocity_limit_to_promote_embryonic_track  <velocity-value> (700.0 m/s)
    velocity_error_to_promote_embryonic_track  <velocity-value> (150.0 m/s)
    position_error_to_promote_candidate_track  <distance-value> (500.0 m  )
    velocity_error_to_promote_candidate_track  <velocity-value> ( 40.0 m/s)
    position_error_to_promote_vertical_channel <distance-value> (500.0 m  )
    velocity_error_to_promote_vertical_channel <velocity-value> ( 40.0 m/s)
 end_one_sigma_state_error_thresholds

 state_error_covariance_matrix_condition_number_thresholds
    promote_track_in_horizontal_channel <value> (2.0e+4)
    promote_track_in_vertical_channel   <value> (1.0e+10)
 end_state_error_covariance_matrix_condition_number_thresholds

 state_variance_limit_active_track
    max_std_dev_straight_flight_model <distance-value> (800.0 m)
    max_std_dev_turning_flight_model  <distance-value> (800.0 m)
    min_std_dev_straight_flight_model <distance-value> (400.0 m)
    min_std_dev_turning_flight_model  <distance-value> (400.0 m)
 end_state_variance_limit_active_track

 mode_transition_probability_matrix
    straight_to_straight_flight <value> (0.70)
    straight_to_turning_flight  <value> (0.30)
    turning_to_turning_flight   <value> (0.30)
    turning_to_straight_flight  <value> (0.70)
 end_mode_transition_probability_matrix

 probability_of_falsely_rejecting_correlation
    measurement_to_track <value> (1.0e-20)
    track_to_track       <value> (1.0e-20)
 end_probability_of_falsely_rejecting_correlation

 consecutive_single_source_hits_to_promote_track <value> (0)

 track_correlation_cylinder
    cylinder_height   <distance-value> (2000 m)
    cylinder_diameter <distance-value> (2000 m)
 end_track_correlation_cylinder

 mttc_track_fusion <"all_sources" | "initial_source_only"> (all_sources)