Prospects for Precision Active Tracking using a Quadrant Detector

A general model is developed for an active quadrant tracking system constrained to track the nose or leading edge of incoming missiles and aircraft. The basic system consists of a shortpulse Nd:YAG 1.06-micrometer laser transmitter and a laser receiver with a quadrant avalanch photodiode detector in...

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Bibliographic Details
Main Author: Walter,J F
Format: Report
Language:English
Subjects:
AIRCRAFT
ATMOSPHERICS
AVALANCHE DIODES
ERRORS
GUIDED MISSILE TRACKING SYSTEMS
INFRARED TRANSMITTERS
LASER TRACKING
Lasers and Masers
LEADING EDGES
NEODYMIUM LASERS
Neodymium YAG lasers
OPTICAL RADAR
PHOTODIODES
Quadrant detectors
QUADRANTS
SIGNAL PROCESSING
SIGNAL TO NOISE RATIO
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Summary:A general model is developed for an active quadrant tracking system constrained to track the nose or leading edge of incoming missiles and aircraft. The basic system consists of a shortpulse Nd:YAG 1.06-micrometer laser transmitter and a laser receiver with a quadrant avalanch photodiode detector in a direct detection mode. Using the model with carefully selected target, atmospheric, system, and detector parameters, estimates are made of the random tracking errors to be expected under various conditions. The conditions are noted under which tracking errors of 10 micro rad. (maximum) can be expected. (Author)