الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Stealthy aircraft detection attracted a substantial attention in the recent years. The proposes an alternative measures for detecting stealthy aircraft using the operating monostatic radar parameters. This technique is used for detecting and tracking the small cross section area and stealthy aircrafts. The proposed measures are studied with different radar parameters to extend the detection coverage over the monostatic radar used for air surveillance. The simulation is done using Computer Aided Radar Performance Evaluation Tool (CARPET). It is a comprehensive computer program which alleviates the difficult task of designing and evaluating surface based radar systems. The studied parameters are the operating frequency,the transmitted power, pulse width, pulse repetition frequency, antenna polarization and tilt angle. The results show that the optimized parameters achieve a range extension of 100 Kmand 50 % detection probability over the worst case parameters for detecting and tracking stealthy aircraft. This is devoted to model a multistatic radar cross section for army plane stealthy target.The model predict the target aperture area using a scaled model measurements in order to achieve a long scale electromagnetic radar cross section for the modeled aircraft. The target multistatic radar cross section modeled as a function of the electromagnetic wave incident angle, its polarization, target azimuth angle, elevation angle, and the electrical characteristic of the stealthy coating material. The results give accurate radar cross section for the target for all azimuth angles and from 0 to m70 degree of the elevation angles compared with the fixed radar cross section of an army plane target reported as 0.025 m2. Bi- and multistatic radar are expected to benefit from their separation of transmitter and receiver that denies receiver recognition by anti-radiation missile, favors covered operation by their silent receivers, has higher detection possibilities of stealthy objects and is less vulnerable to jamming. The requirements of synchronization in a separated transmitter-receiver system are discussed. The processing in bistatic radar must include the knowledge of geometry dependencies that exist for bistatic radar in range, Doppler and S/N ratio. Different track profiles relative to bistatic radar orientation and the range-Doppler relationships are presented together with examples from the processing in different types of bi- and multistatic radar. The extraction of target parameters, such asposition, velocity and heading could require the combination of data as a function of timeand/or contribution from several systems. A discussion of tracking in bi- and multistatic radar is included to the end that uses simulated input to estimate parameters with comparison of iv different methods of estimating measurement uncertainty and the use of bistatic or multistatic radar input data.Also system geometry with two transmitters and six receivers is used to extends the radar stealthy aircraft detection. Monte Carlo simulation for the stealthy aircraft radar cross sectionused from accurate radar cross section estimation in the literature. The simulation of the geometrical structure is studied with different radars spacing to extend the detection coverage over the monostatic radar used for air surveillance. The radar detection coverage is also studied with all possible stealthy aircraft paths to find the improvement achieved from using this type of radar. The radar detection coverage is also studied with all possible stealthy aircraft paths to find the improvement achieved from using this type of radar.