University of Wisconsin GIFTS MURI

University of Hawaii Contributions

Paul G. Lucey

Co-Investigator

Hawaii Capabilities Contribute To All Aspects of Wisconsin MURI Project

University of Hawaii ContributionsMURIResearchComponents

IR SpectralPhenomenology

HyperspectralData Collection

HyperspectralDataCompressionMethodologies

MathematicalQuantificationofHyperspectralInformation

Provide testdata sets

Leverage other-funded UHresearch toreduce datavolume

RadiativeTransferModeling

Contributeexperience withmeasurementand modeling ofsurfaces

MathematicalRetrievalAlgorithmDevelopment

Contributeground-trutheddata sets

ProductResearch

Integrate modeling/data collection/informationextraction

Overview—

•Surface Materials Properties • Airborne hyperspectral data reduced to emissivity• Laboratory data collection of materials spectral properties

•Directed airborne hyperspectral data collection

• Specialized surface materials properties of interest to GIFTS MURI• Data collections in support of

atmospheric model validation

•Hyperspectral analysis methodologies• Target detection and surface materials classification algorithms.

AHI Airborne LWIR Hyperspectral Imager

UV, VISNIR, MWIR/LWIR

Field Spectrometers

UH Operates Airborne, Field and Laboratory Hyperspectral Data Collection Systems for Collection of

Surface Materials Spectral Properties

Nicolet MWIR/LWIR Laboratory FTIR

Extensive Airborne Data Sets of Various Terrains

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Apparent Emissivity

Mosaic of (AHI) LWIR Data of Silver Lake CA

End-Members Determined byN-FINDR withConstrained Unmix

Abundance of Kaolinite calculated from spectral

unmixing

Kaolinite

Quartzite

Carbonates

Mixed Clays and Other Silicates

Mixed Clays

LWIR spectra of mineral components in the scene

Airborne Hyperspectral and Field Ground Truth

Solid: AHI Airborne hyperspectral

Symbols: Field spectrometer ground truth

Field Hyperspectral Ground Truth and Laboratory Support

Directed AHI airborne hyperspectral data collection

•Specialized surface materials properties of interest to GIFTS MURI

•Data collections in support of atmospheric model validation

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Apparent Emissivity

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Wavelength (um)

Emissivity

Gas detection using a matched filter with AHI

Red area shows gas detection

Single band TIR image Matched filter detection

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Emissivity

Gas Absorption PeaksGas Absorption Peaks

Probable reflected ozone

Spectra from AHI Data Cube

Relevant Spectral Resolution

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AHI maximum spectral resolution (3 wavenumbers) is relevant to some GIFTS data collection modes

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Hyperspectral analysis methodologiesTarget detection and surface materials classification algorithmsAutonomous End-members and Spectral Unmixing

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3 Spectral Endmembers Found Using Autonomous Method:

N-Findr Spectra then “Unmixed” Using Linear Algebra

Endmember spectra interpreted using spectrum library search

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Calcite

Alunite

Buddingtonite

Comparison of N-FINDR Endmember Spectra Comparison of N-FINDR Endmember Spectra to Library Spectrato Library Spectra

N-FINDR is red

Spectra Compare Best for Materials that have a near Pure Pixel in the Scene

Surface materials mappingSurface materials mapping

Red: Silicates• Halloysite• Kaolinite• Jarosite• Buddingtonite

Green: Carbonates• Calcite

Blue: Sulfates• Alunite

MURI Progress—

Continuing compilation of non-classified airborne hyperspectral data sets in units of surface emissivity in accessible on-line form

Continued collection of laboratory data in support of surface emissivity library

Test data collection of airborne hyperspectral data in Hawaii for atmospheric model validation.

Compilation of non-classified airborne hyperspectral data

UH has collected 100’s of Gbytes of airborne hyperspectral data, but accessibility is poor (off-line DVD chronological storage)

Data catalog is under development including geographic location, thumbnails and materials summaries.

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Series1

Progress—

Continued collection of laboratory data in support of surface emissivity library

Progress—

Test data collection of airborne hyperspectral data in Hawaii for atmospheric model validation.

AHI Flight Lines

Single band IR image of active flow field

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Wavelength (microns)

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SO2SO2

Metastablesilica glass

along track

Spatial spectral slice showing SO2 and metastable glass

Brightness temperature

Apparent Emissivity

UVS Ground truth measurements of SO2 abundance

Plan for Next Reporting Period

•Completion of on-line data base of laboratory spectra with simple data ingestion

•On-line data base/catalog of AHI airborne data

•Continue collection of directed validation airborne data runs

•Focus on aerosols and water vaporUsing HIGP ground truthing tools•Aerosol photometer•NIR/SWIR spectral water vapor

measurements•GPS water vapor