Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol...
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Transcript of Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol...
![Page 1: Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol Bruegge (JPL) By: Victor Chu.](https://reader030.fdocuments.in/reader030/viewer/2022032704/56649d5e5503460f94a3e900/html5/thumbnails/1.jpg)
Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations
Mentor: Dr. Carol Bruegge (JPL)
By: Victor Chu
![Page 2: Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol Bruegge (JPL) By: Victor Chu.](https://reader030.fdocuments.in/reader030/viewer/2022032704/56649d5e5503460f94a3e900/html5/thumbnails/2.jpg)
Who
• Funding: Non-NASA contract– ICATS project (Image Chain Analysis Technology for
Space)
• Orbiting Carbon Observatory (OCO)– OCO requires knowledge of surface polarization
properties for its retrieval algorithm– The task utilizes a retrieval code also used by OCO
• Multiangle SpectroPolarimetric Imager (MSPI)– JPL polarimeter built to study aerosols
![Page 3: Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol Bruegge (JPL) By: Victor Chu.](https://reader030.fdocuments.in/reader030/viewer/2022032704/56649d5e5503460f94a3e900/html5/thumbnails/3.jpg)
Pre-Cursor
• Multi-angle Imaging SpectroRadiometer (MISR)
• Orbit since 1999
• 275m resolution
• 0º, 26º, 46º, 60º, and 70º fore and aft of nadir
• Spectral Bands - 446, 558, 672, 866 nm
• Multi-angle – Unique Capabilities
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What it can doMISR generated image
Enhanced sensitivity to aerosols
![Page 5: Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol Bruegge (JPL) By: Victor Chu.](https://reader030.fdocuments.in/reader030/viewer/2022032704/56649d5e5503460f94a3e900/html5/thumbnails/5.jpg)
Polarization
• MISR lacks Polarization Sensor
• Polarization Adds New Dimension
• New level of clarity
![Page 6: Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol Bruegge (JPL) By: Victor Chu.](https://reader030.fdocuments.in/reader030/viewer/2022032704/56649d5e5503460f94a3e900/html5/thumbnails/6.jpg)
What it COULD do
• Camouflaged objects are difficult to detect with MISR
• Polarization makes objects appear extremely clear regardless
![Page 7: Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol Bruegge (JPL) By: Victor Chu.](https://reader030.fdocuments.in/reader030/viewer/2022032704/56649d5e5503460f94a3e900/html5/thumbnails/7.jpg)
Do you see any trucks?
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What about now?
![Page 9: Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol Bruegge (JPL) By: Victor Chu.](https://reader030.fdocuments.in/reader030/viewer/2022032704/56649d5e5503460f94a3e900/html5/thumbnails/9.jpg)
See them now?
![Page 10: Polarization Surface-State Retrieval in the Presence of Atmospheric Perturbations Mentor: Dr. Carol Bruegge (JPL) By: Victor Chu.](https://reader030.fdocuments.in/reader030/viewer/2022032704/56649d5e5503460f94a3e900/html5/thumbnails/10.jpg)
MSPI
• Follow-on instrument to MISR
• Many factors affect polarimetric accuracy
• Requires calibration
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Radiative Programs• VLIDORT
• Few Polarization calculators– MODTRAN
• Developed by the Air Force Geophysical Laboratory (AFGL)
– MODTRAN 5– ICATS team has access to MODTRAN 4P beta
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Effects of Aeresol
Ground Downwelling
Ground Upwelling
Satellite Upwelling
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Degree of Linear Polarization
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Effects of Gases
Ground Downwelling
Ground Upwelling
Satellite Upwelling
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Degree of Linear Polarization
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Future Plans
• Simulations of test scenes
• Identify surfaces given Stokes parameters
• Measurement capability
• Validation of both VLIDORT and MODTRAN 4P
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Acknowledgements
• Dr. Carol Bruegge, Mentor
• Vijay Natraj, VLIDORT expert
• Rob Spurr, VLIDORT author
• SURF office for program organization
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References
• D. Diner, A. Davis, R. Chipman, “Innovative Technology Approach for High-Accuracy Imaging Spectropolarimetry at Multiple View Angles,” project proposal for funding, 2006.
• Spurr, Robert J.D. VLIDORT: A linearized pseudo-spherical vector discrete ordinate radiative transfer model for forward model and retrieval studies in multilayer multiple scattering media. JQSRT 2006 in press.
• T. Takashima, K. Masuda, “Degree of radiance and polarization of upwelling radiation from an atmosphere-ocean system”, Applied Optics 24, 15, 2423 (1985)
• T. Cronin, E. Warrant, B Greiner, “Celestial polarization patterns during twilight”, Applied Optics 45, 22, 5582 (2006)
• G.N. Plass, G.W. Kattawar, “Polarization of the Radiation Reflected and Transmitted by the Earth’s Atmosphere”, Applied Optics 9, 5, 1122 (1970)
• J. S. Tyo, D. L. Goldstein, D. B. Chenault, J. A. Shaw, “Review of passive imaging polarimetry for remote sensing applications”, Applied Optics 45, 22, 5453 (2006