Derivation of a Signed Cameron Decomposition Asymmetry Parameter and Relationship of Cameron to Huynen Decomposition Parameters

摘要

An alternate definition of the asymmetry parameter $tau$, appearing in the Cameron decomposition is presented. The new definition is signed as $tau_{s}$, but in absolute value, it is equivalent to the previous definition. The Cameron decomposition signed asymmetry parameter $tau_{s}$ is given in terms of the Huynen decomposition parameters, including but not limited to the Huynen helicity (asymmetry) parameter. It is demonstrated that the Huynen decomposition asymmetry parameter is a poor indicator of scatterer symmetry. The relationship between the Cameron and Huynen decomposition parameters is examined for special cases.