And the aspect angle
of antenna is narrow for high frequency band SAR, so the aspect dependence is not prominent.
Its aspect angle
and time-range profiles under the two conditions after translational motion compensation are shown in Fig.
We saw the behavioural pattern of the radar system in the presence of aspect angle
changing from 0 to 270 degrees as well as changing scatterer spacing.
0] - the initial aspect angle
of the target, assumed to be at a distance of 10 Km; [omega] - the constant angular velocity; [gamma] - the angular acceleration, varying for each period; [t.
There are differences in aspect angle
and aspect rate that pilots can discriminate in the air but which cannot be displayed with an adequate number of addressable pixels by the visual display systems of contemporary flight simulators.
In simulations that applied scatters modeled by using the real-sized CAD data of five automobiles, the proposed method yielded high classification results that were insensitive to the range of aspect angle
, the size of training database, and the fluctuation of RPs.
The range and aspect angles
are calculated from the X, Y and Z values.
Then the WC's sensitivity to the aspect angle
is detailedly investigated in Section 4.
Range resolution is guaranteed by transmitting a large signal bandwidth but cross-range resolution depends on variations of the aspect angle
induced, mainly, by target dynamics.
It is affected by the size, shape, material, and surface texture of the object causing reflection - and varies with frequency and aspect angle
d] and the aspect angle
variation [DELTA][theta] of the target.
High range resolution is achieved by transmitting a large bandwidth signal, and high Doppler resolution depends on a large aspect angle
variation of the target during the illumination time (or dwell time) .