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s
'
O
P
S
ˈ
R
S
L
ʴ
S
R
2
t
2
Fig. 7. Effects of azimuth Ψ
xyz is the position of the geometry center of the two points. ARPʴR2
is then presented as
Here (, , )
OOO
2
2
cos
ˈ
cos
ˈ
(8)
ʴ
=
2( (
l
ˈ
xyz
,
,
))
=
2( ,
l SS
)
R
2
O
O
O
1
2
d
d
V
iii) Effect of
V
The effect of relative approaching speed
is similar to that by the criterion of
V
wave optics and the ARP ʴ R3 involving
in dynamic situation is
ₒₒ
2
||
VN T
||
cos
2( )
d ˈ
(9
ʴ
=ʔ + =
ʴ
ʴ
C
+
l
ˈ
R
3
V
P
2
)
d
C
O
3.3 Method for ARP Determination in Practice
Since the two criteria should be satisfied at the same time for HIS to distinguish two
object points, both of the resolving powers by the two criteria should be calculated to
find the actual resolving power for HIS. However, for most of real imaging systems,
the statuses of the two criteria are not equal. Reviewing formulas for ARP and MDD
calculations, we find that they are similar in structure:
ₒₒ
ʻ
VN T
Dd
||
||
ʴ
=
1.22
+
C
(10)
WO
O
ₒₒ
2
cos
ˈ
||
VN T
||
ʴ
=
2( )
l
ˈ
+
C
R
d
d
O
ʻ
ₒₒ
ₒₒ
1
s
=
(1.22
d
+
||
V
N
||
T
) ||
N
N
||
WO
O
C
s
t
D
(11)
cos
2
ˈ
ₒₒ
ₒₒ
1
s
=
(2 (
l S
,
S
)
d
+
||
VNT
||
) ||
NN
||
R
12
O
C
S
t
d
Difference between formulas by the two criteria is the static item
cos
d ˈ
2
ʻ
J
=
2( ,
l PP
)
d
J
=
1.22
d
;
WO
O
R
12
O
 
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