Upload
grssieee
View
347
Download
0
Embed Size (px)
DESCRIPTION
Citation preview
IGARSS 2011 Vancouver
Tomographic Profiling (TP)
A Scheme for Vertical Backscatter Profiling of
Biogeophysical Targets at Constant Incidence Angles
Keith Morrison1 & John Bennett2
1Department of Informatics & Systems Engineering, Cranfield University, Shrivenham, UK
2Department of Electronic & Electrical Engineering, Sheffield University, Sheffield S1 3JD, UK
IGARSS 2011 Vancouver
Tomographic Profiling
Vertical backscatter profiles through biophysical and geophysical target volumes:
- snow- ice- vegetation- forestry
From a single pass, it provides:- retrieval of a set of images at different incidence angles- the incidence angle is constant at every point within an image
PRESENTATION - Description of technique- Theory- Experimental examples
IGARSS 2011 Vancouver
IGARSS 2011 Vancouver
IGARSS 2011 Vancouver
IGARSS 2011 Vancouver
xxxxxxx
IGARSS 2011 Vancouver
xxxxxxx
IGARSS 2011 Vancouver
xxxxxxx
IGARSS 2011 Vancouver
xxxxxxx
IGARSS 2011 Vancouver
r1rn
Image region
LD
dx
i
p
i
L - D
d
dx P
z
IGARSS 2011 Vancouver
Vs
Hs
IGARSS 2011 Vancouver
i
R
θsyn
r_res = c 2B
x_res = Θsyn R = λR
2Dcosi
IGARSS 2011 Vancouver
Vs
i
r_resV
x_resV
Vs = r_resV + x_resV
Hs
IGARSS 2011 Vancouver
Vs
r_resV
x_resV
nadir
IGARSS 2011 Vancouver
Vs
r_resV
x_resV
Hs
i
IGARSS 2011 Vancouver
Across-Track Resolution
IGARSS 2011 Vancouver
Vt
F
Vt = { R.(1-cosФ½) +
r_res.cosФ½) }.cosi
Ф
= Ф.R
IGARSS 2011 Vancouver
TP Resolution with Incidence Angle: Airborne
F-SARX-band (9.6GHz, B=800MHz) L-Band (1.33GHz,B=150MHz)
H=3000mD=300m
Ф = 5º
V = argmax {Vs (p) , Vt (p) }
F = 260m
IGARSS 2011 Vancouver
UAVL-band (1.33GHz,B=150MHz)
H=300mD=100m
Ф = 4º
TP Resolution with Incidence Angle: UAV
F = 20m
IGARSS 2011 Vancouver
TP Resolution with Incidence Angle: UAV
UAVX-band (9.6GHz,B=800MHz)
H=300mD=100m
Ф = 4º
F = 20m
IGARSS 2011 Vancouver
Experimental TP Application: Ground-Based
• GB-SAR System
– Forestry– Snowpack
IGARSS 2011 Vancouver
TP Imaging: Forest Canopy
IGARSS 2011 Vancouver
IGARSS 2011 Vancouver
IGARSS 2011 Vancouver
HH
VV
VH
0 20 40 60
IGARSS 2011 Vancouver
TP Imaging: Snowpack
IGARSS 2011 Vancouver
42cm
X-Band TP Image
IGARSS 2011 Vancouver
TP Imaging: Laboratory
IGARSS 2011 Vancouver
Ku-band (17GHz,B=4GHz)
H=2m, D=0.10m, Ф = 10º
IGARSS 2011 Vancouver
SummaryNew Imaging Scheme: Tomographic Profiling (TP)
• Provides vertical backscatter profiles through biophysical and geophysical target volumes:
- snow- ice- vegetation - forestry
• From a single pass, it provides:- retrieval of a set of images at different incidence angles- the incidence angle is constant at every point within an
image
• Provided experimental results from ground-based field and laboratory measurements
• Future work to see airborne demonstration
IGARSS 2011 Vancouver
TP Imaging: Resolution
C-band (5GHz,B=1.75GHz)
H=2-9m, D=0.2m, Ф = 30º