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Do you see these two papers? paper1and paper2

It seems that desying has a special professional meaning in polarimetric radar studies.

I'm reading this paper and somewhere it says:

We present in this paper an improvement to a decomposition scheme using an idea of desying first conceived by Huynen.

I don't want to go through all the details and understand what desying means exactly. I don't read those two papers suggested in the beginning of this question. I just want to have an idea about desying so I decided to ask it from people who are mastered in radar studies.

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    \$\begingroup\$ Psi (Ψ) is used in some of the formulas for polarimetric radar as the symobol for an angle that represents the orientation between the target and the radar beam. The 9 parameters that Huynen defines must be derived without Ψ, since they are meant to be used regardless of the orientation. Removing the factor Ψ from the measured data is called desying. Not posted as an answer, as I'm no radar guru and only know what a couple of minutes of googling found. \$\endgroup\$
    – JRE
    Jun 25, 2015 at 12:01
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    \$\begingroup\$ If you don't want to understand, why are you asking? \$\endgroup\$
    – Matt Young
    Jun 25, 2015 at 12:02
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    \$\begingroup\$ I do suggest you read the referenced papers, because Ψ seems to be central to a lot of what is going on. \$\endgroup\$
    – JRE
    Jun 25, 2015 at 12:02
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    \$\begingroup\$ Desying ought to really be spelled "deΨying" but who's gonna type THAT all the time? \$\endgroup\$
    – JRE
    Jun 25, 2015 at 12:08
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    \$\begingroup\$ I cheated and copy/pasted the symbol Ψ from the wikipedia site. Yes, I meant those. But you'd probably do better to look up Huynen's book "Phenomenological theory of radar targets" in which he defines the term. \$\endgroup\$
    – JRE
    Jun 25, 2015 at 12:20

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Since no one else has answered, I'll go ahead and make an answer out of my comments.

Downvotes and corrections welcome. :)


Psi (Ψ) is used in some of the formulas for polarimetric radar as the symobol for an angle that represents the orientation between the target and the radar beam. The 9 parameters that Huynen defines must be derived without Ψ, since they are meant to be used regardless of the orientation. Removing the factor Ψ from the measured data is called desying.

Since Ψ is central to much of what goes on, I would suggest you read at least the relevant parts of the papers you linked to, or perhaps better yet find a copy of Huynen's book Phenomenological Theory of Radar targets in which he defines the term "desying."

The term "desying" makes more sense if you think of it as "deΨing" or "dePsiing."

My understanding of this comes from page 76 of Target Scattering Decomposition in Terms of Roll-Invariant Target Parameters by Ridha Touzi.

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