Velocity Dealiasing for 94 GHz Vertically Pointing MMCR with Dual-PRF Technique

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Spectral dealiasing is a very important technique in the velocity pointing millimeter-wave cloud radar. Lin et al. (2023) proposed a new method to solve the velocity aliasing under the half-folding condition by the dual PRF technique. They demonstrated the method by observations and comparisons with other methods. The paper was organized well and results are interesting. I think the paper can be published with a minor revision. I have several minor comments below:

 

1.      Besides the references 22-24, are there other papers/methods dealing with the half-folding issue? If yes, please provide a more comprehensive introduction for the background, not only comparing to Zheng’s method.

2.      Is Zheng’s method the best all over the world before your method published? If yes, please emphasis that you are the first one to solve this problem. If not, please discuss more details on the novelty of your method.

3.      Figure 10, a difference between two methods would be better to reveal your improvements.

Author Response

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Reviewer 2 Report

Comments and Suggestions for Authors

This paper proposes a new approach that applies the dual PRF technique to spectral dealiasing to address the failing of traditional method. This method exploits the property that true velocity differences between peaks should be the same in both PRFs, allowing it to solve a specific form of half-folding caused by multiple peaks. The authors demonstrated this approach worked for a special case and furthermore  solved all aliasing cases when the implicit half-folding occurs using observations from a 94 GHz vertically pointing MMCR.

I found the manuscript well written and easy to follow. The study presents significant advancement in solving the half-folding velocity aliasing issue. I believe it will provide valuable insights and profound implications to the field. I recommend publication after some minor polishing on the english language.  

Comments on the Quality of English Language

english language of this manuscript can be polished and benefit from another thorough read-through.

Author Response

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Reviewer 3 Report

Comments and Suggestions for Authors

This paper proposes a reliable velocity dealiasing method for vertically pointing MMCR based on the dual PRF technique, by utilizing the property that the true velocity difference between peaks should be the same in both PRFs. The reliability of the method was demonstrated by TJ-II observations. The paper is well-written and of great interest to readers. I recommended publication after minor revisions.

Specific comments and suggestions：

1.     Section 1-4 can be reorganized.

2.     In Figure 8, it may be better for readers to see the performance of the proposed method if the dealiased Doppler spectrum was given.

 

 

Comments on the Quality of English Language

The paper is well-written and the English language is fine.

Author Response

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Reviewer 4 Report

Comments and Suggestions for Authors

Review of “Velocity Dealiasing for 94 GHz Vertically Pointing MMCR with Dual PRF Technique”

Brief Summary

In this study, the authors propose a new method to perform dealiasing on vertical velocity measurements from a vertically-pointing cloud radar, focusing on the removal of “half-folded” velocity spectra. The method uses an enhanced dual-PRF technique and uses spectral dealiasing to determine, in the event of multi-modal velocity distributions, which peak is closest to the “true” velocity and which peak is the folded velocity, and then the half-folded velocities are corrected to a true velocity. The motivation for the study is well supported, the methodology is sufficiently descriptive and well written, and the presented results effectively show the success that the new dealiasing algorithm has in removing half-folded velocities, including how the algorithm performs much better at dealiasing the velocity measurements than currently-available algorithms. I have just a few suggestions on text edits.

Specific Comments

Line 46-47 – change wording to “Despite the fact that the vertical velocity of the cloud is much smaller than its horizontal velocity, …”

Line 82 – 84 – These two sentences should be connected together (“… can be regarded as a target object, while the velocity in vertically…”).

Line 205 – “…, which are almost two peaks,…” Is this supposed to read “…, which are almost always two peaks,…”?

Line 325 – “… detect the aliasing is one times Nyquist velocity…”. Should this read “… is one times the Nyquist velocity…”?

Author Response

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