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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.

JRE
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Sepideh Abadpour
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    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. – JRE Jun 25 '15 at 12:01
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    If you don't want to understand, why are you asking? – Matt Young Jun 25 '15 at 12:02
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    I do suggest you read the referenced papers, because Ψ seems to be central to a lot of what is going on. – JRE Jun 25 '15 at 12:02
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    Desying ought to really be spelled "deΨying" but who's gonna type THAT all the time? – JRE Jun 25 '15 at 12:08
  • @MattYoung I will follow your advise but I have read Huynen's dissertation. I just didn't think that desying has some kind of relationship with Psi($\Psi$) – Sepideh Abadpour Jun 25 '15 at 12:09
  • @JRE could you tell me how do you write the greek symbol for Psi? And also do you mean the first two papers that I have linked in the question as referenced papers? I also googled before asking but google suggested defying instead of desying. I thought it should be a really hard professional word though – Sepideh Abadpour Jun 25 '15 at 12:13
  • @JRE Could you please give me the link where you extracted the information mentioned in your first comment about desying. I wanna see if it has provided any references or pointed to a specific part of Huynen's dissertation? thanks alot – Sepideh Abadpour Jun 25 '15 at 12:18
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    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. – JRE Jun 25 '15 at 12:20
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    The info in my first comment came from "Target Scattering Decomposition in Terms of Roll-Invariant Target Parameters" by Ridha Touzi (http://ieeexplore.ieee.org/xpl/login.jsp?reload=true&tp=&arnumber=4039635&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D4039635) page 76 – JRE Jun 25 '15 at 12:22
  • And also the book polarimetric radar imaging: From basics to applications by J.S.Lee and E.Pottier pages 75 and 76 is a good reference. You can read these two pages of the book on google books @JRE – Sepideh Abadpour Jun 25 '15 at 12:31
  • You can write $$\Psi$$ by typing $\verb|$$\Psi$$|$ – Spehro Pefhany Jun 25 '15 at 13:59
  • Or \$\Psi\$ for inline. EE.SE uses \$ instead of just $ because we are also often interested in talking about how much things cost. – The Photon Jun 25 '15 at 16:27
  • The XML/HTML way using the entities ψ and Ψ will also work in most (not all, eg. not in comments) editable fields on this site. – ocrdu Jul 09 '22 at 12:16

1 Answers1

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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.

JRE
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