Aerospace and Electronic Systems Magazine July 2017 - 41
by computing the object's offset from its known location at various
times in the data collection.
To begin, the entire aperture is divided into overlapped 4-degree subapertures with 1-degree step size between adjacent subapertures (i.e., a 3-degree overlap exists between neighboring
subapertures). The BP imaging method [8] is then used to obtain
subimages of quad-trihedral corner reflectors. Defining (ξx, ξy) as
the quad-trihedral's offset from its true position within the BP subaperture image as shown in Figure 3, the slant-range error Δ at each
subaperture is given by
Δ = ξ x cos (φs ) cos (θ s ) + ξ y cos (φs ) sin (θ s ) ,
quence of operations, including the segmented iterative adaptive
approach (SIAA) [6], the fast IAA (FIAA) [5], [6], and the sparse
learning via iterative minimization (SLIM) method [7].
Let a generic image or target scene be segmented into R × L
potential scatterers pr,l for r = 1,...,R and l = 1,...,L at each subaperture. The returned signal yn p ( f m ) obtained from the npth pulse and
frequency bin fm can be given by
R
L
yn p ( f m ) = α pr ,l e
r =1 l =1
−j
4π
f m τ − pr ,l
c
(
)
+ vn p ( f m ) ,
(2)
(1)
where θs and ϕs are the averaged azimuth and elevation angles for
the subaperture, respectively [9].
After the slant-range errors at each subaperture are obtained, a
robust polynomial regression is conducted to obtain parameters representing the pulse-to-pulse range error. After correcting for the pulseto-pulse slant-range error, well-focused and well-registered images of
the scene may be formed as shown in the right image of Figure 4.
HYBRID HIGH-RESOLUTION SAR IMAGING
After focusing, we segment the entire 360-degree aperture into
overlapped 2-degree subapertures with 1-degree step size. The
hybrid high-resolution SAR imaging method [12] consists of a se-
Figure 3.
A slant-range error Δ at each subaperture.
Figure 2.
A quad-trihedral corner reflector is used to compensate for the slantrange error at each subaperture.
JULY 2017
Figure 4.
Unfocused and focused BP image of the quad-trihedral with 30% missing data.
IEEE A&E SYSTEMS MAGAZINE
41
Table of Contents for the Digital Edition of Aerospace and Electronic Systems Magazine July 2017
No label
Aerospace and Electronic Systems Magazine July 2017 - No label
Aerospace and Electronic Systems Magazine July 2017 - Cover2
Aerospace and Electronic Systems Magazine July 2017 - 1
Aerospace and Electronic Systems Magazine July 2017 - 2
Aerospace and Electronic Systems Magazine July 2017 - 3
Aerospace and Electronic Systems Magazine July 2017 - 4
Aerospace and Electronic Systems Magazine July 2017 - 5
Aerospace and Electronic Systems Magazine July 2017 - 6
Aerospace and Electronic Systems Magazine July 2017 - 7
Aerospace and Electronic Systems Magazine July 2017 - 8
Aerospace and Electronic Systems Magazine July 2017 - 9
Aerospace and Electronic Systems Magazine July 2017 - 10
Aerospace and Electronic Systems Magazine July 2017 - 11
Aerospace and Electronic Systems Magazine July 2017 - 12
Aerospace and Electronic Systems Magazine July 2017 - 13
Aerospace and Electronic Systems Magazine July 2017 - 14
Aerospace and Electronic Systems Magazine July 2017 - 15
Aerospace and Electronic Systems Magazine July 2017 - 16
Aerospace and Electronic Systems Magazine July 2017 - 17
Aerospace and Electronic Systems Magazine July 2017 - 18
Aerospace and Electronic Systems Magazine July 2017 - 19
Aerospace and Electronic Systems Magazine July 2017 - 20
Aerospace and Electronic Systems Magazine July 2017 - 21
Aerospace and Electronic Systems Magazine July 2017 - 22
Aerospace and Electronic Systems Magazine July 2017 - 23
Aerospace and Electronic Systems Magazine July 2017 - 24
Aerospace and Electronic Systems Magazine July 2017 - 25
Aerospace and Electronic Systems Magazine July 2017 - 26
Aerospace and Electronic Systems Magazine July 2017 - 27
Aerospace and Electronic Systems Magazine July 2017 - 28
Aerospace and Electronic Systems Magazine July 2017 - 29
Aerospace and Electronic Systems Magazine July 2017 - 30
Aerospace and Electronic Systems Magazine July 2017 - 31
Aerospace and Electronic Systems Magazine July 2017 - 32
Aerospace and Electronic Systems Magazine July 2017 - 33
Aerospace and Electronic Systems Magazine July 2017 - 34
Aerospace and Electronic Systems Magazine July 2017 - 35
Aerospace and Electronic Systems Magazine July 2017 - 36
Aerospace and Electronic Systems Magazine July 2017 - 37
Aerospace and Electronic Systems Magazine July 2017 - 38
Aerospace and Electronic Systems Magazine July 2017 - 39
Aerospace and Electronic Systems Magazine July 2017 - 40
Aerospace and Electronic Systems Magazine July 2017 - 41
Aerospace and Electronic Systems Magazine July 2017 - 42
Aerospace and Electronic Systems Magazine July 2017 - 43
Aerospace and Electronic Systems Magazine July 2017 - 44
Aerospace and Electronic Systems Magazine July 2017 - 45
Aerospace and Electronic Systems Magazine July 2017 - 46
Aerospace and Electronic Systems Magazine July 2017 - 47
Aerospace and Electronic Systems Magazine July 2017 - 48
Aerospace and Electronic Systems Magazine July 2017 - 49
Aerospace and Electronic Systems Magazine July 2017 - 50
Aerospace and Electronic Systems Magazine July 2017 - 51
Aerospace and Electronic Systems Magazine July 2017 - 52
Aerospace and Electronic Systems Magazine July 2017 - 53
Aerospace and Electronic Systems Magazine July 2017 - 54
Aerospace and Electronic Systems Magazine July 2017 - 55
Aerospace and Electronic Systems Magazine July 2017 - 56
Aerospace and Electronic Systems Magazine July 2017 - 57
Aerospace and Electronic Systems Magazine July 2017 - 58
Aerospace and Electronic Systems Magazine July 2017 - 59
Aerospace and Electronic Systems Magazine July 2017 - 60
Aerospace and Electronic Systems Magazine July 2017 - 61
Aerospace and Electronic Systems Magazine July 2017 - 62
Aerospace and Electronic Systems Magazine July 2017 - 63
Aerospace and Electronic Systems Magazine July 2017 - 64
Aerospace and Electronic Systems Magazine July 2017 - Cover3
Aerospace and Electronic Systems Magazine July 2017 - Cover4
http://www.brightcopy.net/allen/aesm/34-2s
http://www.brightcopy.net/allen/aesm/34-2
http://www.brightcopy.net/allen/aesm/34-1
http://www.brightcopy.net/allen/aesm/33-12
http://www.brightcopy.net/allen/aesm/33-11
http://www.brightcopy.net/allen/aesm/33-10
http://www.brightcopy.net/allen/aesm/33-09
http://www.brightcopy.net/allen/aesm/33-8
http://www.brightcopy.net/allen/aesm/33-7
http://www.brightcopy.net/allen/aesm/33-5
http://www.brightcopy.net/allen/aesm/33-4
http://www.brightcopy.net/allen/aesm/33-3
http://www.brightcopy.net/allen/aesm/33-2
http://www.brightcopy.net/allen/aesm/33-1
http://www.brightcopy.net/allen/aesm/32-10
http://www.brightcopy.net/allen/aesm/32-12
http://www.brightcopy.net/allen/aesm/32-9
http://www.brightcopy.net/allen/aesm/32-11
http://www.brightcopy.net/allen/aesm/32-8
http://www.brightcopy.net/allen/aesm/32-7s
http://www.brightcopy.net/allen/aesm/32-7
http://www.brightcopy.net/allen/aesm/32-6
http://www.brightcopy.net/allen/aesm/32-5
http://www.brightcopy.net/allen/aesm/32-4
http://www.brightcopy.net/allen/aesm/32-3
http://www.brightcopy.net/allen/aesm/32-2
http://www.brightcopy.net/allen/aesm/32-1
http://www.brightcopy.net/allen/aesm/31-12
http://www.brightcopy.net/allen/aesm/31-11s
http://www.brightcopy.net/allen/aesm/31-11
http://www.brightcopy.net/allen/aesm/31-10
http://www.brightcopy.net/allen/aesm/31-9
http://www.brightcopy.net/allen/aesm/31-8
http://www.brightcopy.net/allen/aesm/31-7
https://www.nxtbookmedia.com