Development of RADARSAT Visualization Tools

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Development of RADARSAT Visualization Tools

• Richard S. Guse
• Committee
• Dr. Mitchell Roth (chair)
• Dr. Kara Nance
• Dr. Chris Hartman

http//viz1.cs.uaf.edu/rgps
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Satellite Tracks

• side-scan radar
• sees through
• clouds
• night
• right-looking SAR with a rectangular antenna

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SAR

• (S) ynthetic
• (A) perture
• (R) adar

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Foreshortening
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Layover
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Distortion Example
ERS-1
JERS-1
Look Angle 35.21 R
Look Angle 20.355 R
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Shadowing
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Ground Scattering
3
1
2
4
6
5
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RADARSAT Image
N
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Satellites
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Satellite Tidbits

• Object Resolution
• Ships at sea either wakes
• narrow objects along orbital track
• ROADS
• TRANS-ALASKA PIPELINE
• Uses
• Sea Ice Monitoring
• Volcanic eruptions Oil Spills
• Glacier Monitoring

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Purpose

• To process image data into fields of geophysical
  variables which will support Arctic-wide science
  investigations

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RGPS Applications

• Impact of Sea Ice on Climate
• Pollution Monitoring
• Ice Navigability
• Oil Resources
• Weather Forecasting
• Climate Prediction

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RGPS Arctic Snapshot Coverage
Cycle 15
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RGPS Time Series

• GPS Snapshots in time (2-D)
• RGPS time-series of images over a region (3-D
  in time)
• New Geophysical Data
• Ice Motion/Deformation
• Ice Age, Backscatter, Thickness
• Ice/Water Fraction

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RGPS Products
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Lagrangian Grids
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Example Data Format

• Metadata Record Contents
• Product Identifier, number of images, time range,
  map points, etc.
• Image Description Data
• information for each image used (image ID,
  center coordinates time)
• Gridpoint/Trajectory Description Data
• follows each point along the Lagrangian grid

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Histogram Data

• 3-Dimensional Data
• Each Pixel -gt Histogram
• example Ice Age
• scale represents histogram bins

Fractional Areas for each range.
0
30
65
5
2nd
1st
3rd
multi-year
Year Ice
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LimVect - Richard Griswold

• Visualization of Lagrangian Ice Motion (LIM)
  Using AVS (Advanced Visualization System)

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LimVect - Richard S. Guse

• Modification of Richards work to support
• drawing of latitude/longitude lines
• image bounds
• coastline
• ice motion direction ? Hue
• ice motion speed ? Saturation
• slow white, fast color
• Ice thickness product
• Ice temperature plots

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Arctic Ocean Ice Motion Visualization -
Layers
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Arctic Ocean Air Temperature Visualization
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RGPSview - Adrian Gerhard

• New Approach
• Public Domain Software
• SGI
• X-Windows
• OSF Motif C
• Viewing LIM data
• Viewing LAS images
• Writing Data to Generic HDF Format

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RGPSview - Richard S. Guse

• Project Goals
• Platform Independent Application
• Process all RGPS products
• Visualization of all Products with embedded map
  coordinates
• Save products in standard file formats
• Development of New Algorithms to visualize
  Histogram Products