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Faraday Rotation. David Le Vine Aquarius Algorithm Workshop March 9-11, 2010. Approach. Rotation Angle Retrieved from 3 rd Stokes Parameter*: Ω F = 0.5 Atan [ T3 / ( Tv – Th ) ].

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## Faraday Rotation

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**Faraday Rotation**David Le Vine Aquarius Algorithm Workshop March 9-11, 2010**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.**Example: Aquarius Simulator**Antenna temperature for vertical polarization (top), horizontal polarization (middle) and third Stokes parameter (bottom) for the Aquarius middle beam.**Retrieved Faraday Rotation Angle**(Top) Faraday rotation angle at boresight of the middle radiometer beam. (Bottom) Third Stokes parameter for the same antenna.**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)**Retrieved Faraday Rotation Angle**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. (Top) Faraday rotation angle at boresight of the middle radiometer beam. (Bottom) Third Stokes parameter for the same antenna.

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