Faraday Rotation David Le Vine Aquarius Algorithm Workshop March 9-11, 2010.
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Transcript of Faraday Rotation David Le Vine Aquarius Algorithm Workshop March 9-11, 2010.
![Page 1: Faraday Rotation David Le Vine Aquarius Algorithm Workshop March 9-11, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022082723/5a4d1ade7f8b9ab059976104/html5/thumbnails/1.jpg)
Faraday Rotation
David Le VineAquarius Algorithm Workshop
March 9-11, 2010
![Page 2: Faraday Rotation David Le Vine Aquarius Algorithm Workshop March 9-11, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022082723/5a4d1ade7f8b9ab059976104/html5/thumbnails/2.jpg)
Approach
Rotation Angle Retrieved from 3rd Stokes Parameter*: ΩF = 0.5 Atan[ T3 / (Tv – Th) ]
*S. Yueh, “Estimation of Faraday Rotation with Passive Microwave Polarimetry for Microwave Remote Sensing of Earth Surfaces”, TGARS, Vol 38 (#5), pp. 2434, Sept. 2000.
![Page 3: Faraday Rotation David Le Vine Aquarius Algorithm Workshop March 9-11, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022082723/5a4d1ade7f8b9ab059976104/html5/thumbnails/3.jpg)
Example: Aquarius Simulator
Antenna temperature for vertical polarization (top), horizontal polarization (middle) and third Stokes parameter (bottom) for the Aquarius middle beam.
![Page 4: Faraday Rotation David Le Vine Aquarius Algorithm Workshop March 9-11, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022082723/5a4d1ade7f8b9ab059976104/html5/thumbnails/4.jpg)
Retrieved Faraday Rotation Angle
(Top) Faraday rotation angle at boresight of the middle radiometer beam. (Bottom) Third Stokes parameter for the same antenna.
![Page 5: Faraday Rotation David Le Vine Aquarius Algorithm Workshop March 9-11, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022082723/5a4d1ade7f8b9ab059976104/html5/thumbnails/5.jpg)
Plan• Test – SMOS “full-pol” data
• Remove spurious signals– Filter at land/water boundaries– Match to theoretical profile
• Magnetic field + estimate of TEC
• Remove bias– Match ground truth (sounder) at selected locations
• Backup Plan– Use model (data assimilation)– Correct for altitude (SMOS algorithm)
![Page 6: Faraday Rotation David Le Vine Aquarius Algorithm Workshop March 9-11, 2010.](https://reader036.fdocuments.in/reader036/viewer/2022082723/5a4d1ade7f8b9ab059976104/html5/thumbnails/6.jpg)
Retrieved Faraday Rotation Angle
(Top) Faraday rotation angle at boresight of the middle radiometer beam. (Bottom) Third Stokes parameter for the same antenna.
Rotation Angle Retrieved from 3rd Stokes Parameter*: ΩF = 0.5 Atan[ T3 / (Tv – Th) ]
*S. Yueh, “Estimation of Faraday Rotation with Passive Microwave Polarimetry for Microwave Remote Sensing of Earth Surfaces”, TGARS, Vol 38 (#5), pp. 2434, Sept. 2000.