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GISMO Radar Review

GISMO Processor and ResultsAugust 7, 2007

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GISMO Interferometry Processor

Raw dataGPS data

Motion dataAccelerometer data

Calibration data

PreprocessorRange

compressorRange

compressed data(channel, waveform)

Waveform combinerAzimuth compressor

with back-projection and ray bending

SLC image archive

InSAR processor:with registration & Interferogram

generation

GISMO processing:Multi-channel/lookingLeft/right separation

Surface clutter cancellationInterferogram flattening

TopographyEstimation

andOrthorectification

Base intensity & topography

archives inSCH and PS

geometry

Range reference functions

Ice density profile

Post InSAR processor:Interferogram filtering

Phase unwrapping

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GISMO Tomography Processor

Raw dataGPS data

Motion dataAccelerometer data

Calibration data

PreprocessorRange

compressorRange

compressed data(channel, waveform)

Waveform combiner

Waveform combined range compressed data

archive

Return/repeat pass selector:

Back-projectiontomography

processor

Range reference functions

3D reflectivity

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Estimate base topography

• 6 interferograms with baseline of 3.91 meters

• (T0/R0, T1/R0)

• (T0/R1, T1/R1)

• (T0/R2, T1/R2)

• (T0/R3, T1/R3)

• (T0/R4, T1/R4)

• (T0/R5, T1/R5)

-8.33

-7.38

-6.43-3.91 3.91

6.43 8.33

7.38

T0 T1

Left side Right side

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GISMO - Interferogram

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Left-Right separation: Theoretical analysis

S1 S2

r1 r2, right

r1

r2, left

P

Q

H

x

h(x)

B

2

21 2

)(

BxxhHr

2

22 2

)(

BxxhHr

121 r

xBrrr

11

1

4exp

4exp)(

r

xBjA

r

xBjArInt q

qp

p

2

)( 221

BxhHrx pp

2)( 22

1

BxhHrx qq

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Left/right side interferogram spectrum

Left side spectrum right side spectrum

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Left/right side interferogram separation

Left side interferogram

Right side interferogram

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Left/right side intensity separation

Left side intensity

Right side intensity

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GISMO Equation

sin1 = n·sin2

ξ)cos(θ

dhDn

ξ)cos(θ

hHr

21

r1

r2

B

α)ξsin(θBr2Br

ξ)θ90cos(αBr2Brr

1122

1

1o

122

122

1

211 r2

B

B

rrα)ξsin(θ

r2

B

B

Δrξ)cos(α

r2

B

B

Δr1ξ)sin(αsinθ

2

1

sinξsinθcosξθsin1

hHr

n

sinξsinθcosξ)sinθ(1dhD

112

1n12

1n1

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Base Topography estimation

• 3.91 m baseline results

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Base Topography estimation

• 3.91 m baseline results

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Estimate base topography

• 6 interferograms with baseline of 7.38 meters

• (T0/R0, T0/R5)

• (T0/R1, T0/R4)

• (T0/R2, T0/R3)

• (T1/R0, T1/R5)

• (T1/R1, T1/R4)

• (T1/R2, T1/R5)

-8.33

-7.38

-6.43-3.91 3.91

6.43 8.33

7.38

T0 T1

Left side Right side

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Interferogram combination with 7.38 m baseline

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Left/right side interferogram spectrum

Baseline:

3.91m

7.38m

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Left/right side interferogram separation

Left side interferogram

Right side interferogram

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Left/right side intensity separation

Left side intensity

Right side intensity