Forward scattering alignment

The Forward Scattering Alignment (FSA) is a coordinate system used in coherent electromagnetic scattering indicating direction.^[1]

The coordinate system is defined from the viewpoint of the electromagnetic wave, before and after scattering. The FSA is most commonly used in optics, specifically when working with Jones Calculus because the electromagnetic wave is typically followed through a series of optical components that represent separate scattering events. It is also considered in the content of remote sensing and radar.^[2]^[3]

FSA gives rise to regular eigenvalue equations. The general alternative coordinate system in electromagnetic scattering is the Back Scattering Alignment (BSA) which is primarily used in radar.^[4]^[5] Both coordinate systems contain essentially the same information and meaning, and thus a scattering matrix can be transformed from one to the other by use of the matrix,

S_{FSA}={\begin{bmatrix}1&0\\0&-1\end{bmatrix}}S_{BSA}

References

^ Woodhouse, Iain H. (2005-11-02). Introduction to Microwave Remote Sensing. CRC Press. p. 79. ISBN 978-0-203-64652-6. Retrieved 2025-07-25.
^ Richards, John A. (2009-10-08). Remote Sensing with Imaging Radar. Springer Science & Business Media. p. 81. ISBN 978-3-642-02020-9. Retrieved 2025-07-25.
^ Chen, C. H. (2024-06-11). Signal and Image Processing for Remote Sensing. CRC Press. ISBN 978-1-04-003125-4. Retrieved 2025-07-25.
^ Okamoto, Ken'ichi (2001). Global Environment Remote Sensing. IOS Press. p. 41. ISBN 978-1-58603-101-5. Retrieved 2025-07-25.
^ Jin, Ya-Qiu; Xu, Feng (2013-03-29). Polarimetric Scattering and SAR Information Retrieval. John Wiley & Sons. ISBN 978-1-118-18816-3. Retrieved 2025-07-25.

References

See also