Graphics Programs Reference
In-Depth Information
In order to calculate the total clutter RCS given in Eq. (6.11), one must first
compute the corresponding clutter areas for both the main beam and the side-
lobes. For this purpose, consider the geometry shown in Fig. 6.7. The angles
represent the antenna 3-dB azimuth and elevation beamwidths,
respectively. The radar height (from the ground to the phase center of the
antenna) is denoted by , while the target height is denoted by . The radar
slant range is , and its ground projection is . The range resolution is
and its ground projection is . The main beam clutter area is denoted by
and the sidelobe clutter area is denoted by
θ
A
and
θ
E
h
r
h
t
R
R
g
∆
R
∆
R
g
A
MBc
A
SLc
.
θ
E
R
θ
e
a
n
tenna boresight
θ
r
h
t
h
r
R
earth surface
R
g
∆
R
g
sidelobe
clutter region
∆
R
g
main beam
clutter region
θ
A
sidelobe
clutter region
Figure 6.7. Clutter geometry for ground based radar. Side view and
top view.
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