CONTENTS

Policy on Intellectual Property Right (IPR)
�1���� Introduction
�2���� Overview of TDOA technology
�3���� Strengths and weaknesses of TDOA compared with traditional AOA
�4���� Hybrid systems
�5���� Summary
�6���� References
Annex 1� Factors affecting RF detection range and geolocation coverage area� for monitoring stations
�1���� Introduction
�2���� General considerations
�3���� Simulations of factors affecting RF detection range in TDOA and AOA monitoring stations
3(a)���� Effects of emitter carrier frequency
3(b)���� Effects of monitoring station antenna elevation
3(c)���� Effects of signal bandwidth
3(d)���� Effect of antenna gain
3(e)���� Effects of terrain and LoS
�4���� Simulations of factors affecting geolocation coverage area in TDOA and AOA monitoring stations
�5���� Comparison of simulated and real RF geolocation measurements
�6���� Conclusions
Annex 2� A study of geolocation accuracy and coverage area for� hybrid AOA/TDOA monitoring stations
�1���� Introduction
�2���� Geolocation methods
�3���� Simulation of geolocation accuracy using a specific example
�4���� Specialized software analysis tool
4(a)���� Example of geographic location
4(d)���� Example of miss-distance plot
�5���� Results of simulations
5(a)���� Network of three monitoring stations
5(b)���� Summary of simulation results (3 stations)
5(c)���� Network of four monitoring stations
5(d)���� Summary of simulation results (4 stations)
�6���� Conclusion