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Maximum Theoretical Angular Accuracy of Planer and Linear Arrays of Sensors

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senmeis

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Hello,

I’m a university student in front of my bachelor thesis. My subject is related to the paper „Maximum Theoretical Angular Accuracy of Planer and Linear Arrays of Sensors“ which is old enough:http://dtic.mil/dtic/tr/fulltext/u2/a028054.pdf
The angular accuracies in this paper are given in equations 19 (respect to the x axis) and 20 (respect to the y axis).

My question is: Shall the angle between the incident wave and the normal direction to the planar array also play a role? I mean, the 90 degrees angle (along the normal direction) shall have the greatest accuracy. The angular accuracies are different with different directions of incidence (different elevation and azimuth angle). In example of line array in equation 29 on page 15 this angle (θ = 15 degrees there) is also considered. Do I understand it correctly?

Senmeis
 

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