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Remote Sensing
Volume 13
Issue 21
10.3390/rs13214373
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Article
Peer-Review Record

Ground Moving Target Imaging for Highly Squint SAR by Modified Minimum Entropy Algorithm and Spectrum Rotation

Remote Sens. 2021, 13(21), 4373; https://doi.org/10.3390/rs13214373
by Shichao Xiong 1, Jiacheng Ni 1,*, Qun Zhang 1,2, Ying Luo 1,2 and Longqiang Yu 1
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Reviewer 3: Anonymous
Remote Sens. 2021, 13(21), 4373; https://doi.org/10.3390/rs13214373
Submission received: 16 September 2021 / Revised: 23 October 2021 / Accepted: 26 October 2021 / Published: 30 October 2021
(This article belongs to the Topic High-Resolution Earth Observation Systems, Technologies, and Applications)

Round 1

Reviewer 1 Report

Although the originality of this paper is average, the writing structure and the organization are very good. The author covered the topic very well. The only problem is related to the complicated equations used in this paper, which needs the reader to spend a long time understanding and linking the meaning of each equation to the other. Also, a summary of the numerical results must be included at the end of the abstract. The related work is missing also, I understand that including an additional section will make the paper length very long, however, it is important to add some recent studies in a separate section. 

Author Response

Please see the attachment.

Author Response File: Author Response.doc

Reviewer 2 Report

Article is well written. Introduction and problem presentation is described properly. Proposed method is explained in a correct way. I think that first figure migth be improved by adding some extra marks (x_e, v_x, v_y, etc). I would like also if autors explain a little bit more how they define base band echo: is is a signal measured by recording device after (beat signal) or signal after preprocessing (like FFT or something). In line 191 I recognize typo. It probabbly shoul be Hadamard product insted of Hardmar product. If I am wrong plead define what Hardmar product is.

Author Response

Please see the attachment.

Author Response File: Author Response.doc

Reviewer 3 Report

This is an interesting contribution to SAR technology with wide theoretical approach.

My notes on the text:

row 225 Table1. This table is not a typical table, but steps in process. I think it will be better to use a flow-chart or a bulleted listing

 

row 382  Table 3 - Ideal value ...of what? Please, better explained

row 387 The radar platform flies at the velocity of 150m/s...add an information about flight altitude and better describe the SAR instrument

Fig.13 ok, may be a scale will be nice; what is the approx. dimension of this ship? And SAR resolution???

it would be appropriate to separate the theoretical and practical parts more. Something is a simulation and some is the practical use of SAR (moving ship) data.

 

Author Response

Please see the attachment.

Author Response File: Author Response.doc

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