Analysis of the Impact of Multipath on Galileo System Measurements

Round 1

Reviewer 1 Report

Initial sections are largely a review of previous work. These sections
could be useful to introduce the topic to the general reader.

Suggestions for some additional explanation and minor correction:

Choice of a polynomial of third degree.
Motivation for selecting the Morlet wavelet.
Important correction: Line 386 missing figure number. 

Author Response

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Reviewer 2 Report

The paper presents an analysis of the impact of multipass on Galileo observations compared to GPS observations. The authors claim that this is study advances existing analysis because it includes a comprehensive comparison, using identical analysis methods, for identical measurement conditions, taking into account the impact of measurement noise and its time correlation. However, despite the analyses of the impact on the positioning solution, which is claimed to be novel although no important differences have been observed, the authors do not explain the specific contributions over what has already been found by references [2], [19], and [26]. The author must state the clear difference and contributions of their work over existing literature.

Author Response

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Reviewer 3 Report

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Comments for author File: Comments.pdf

Author Response

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Reviewer 4 Report

Dear Authors,

the article entitled: Analysis of the Impact of Multipath on Galileo System Measurements is to determine whether the Galileo code observations are more resistant to the multipath effect than GPS observations. It is very interesting and innovative because the multipath is still one of the major error sources in precise Global Navigation Satellite Systems (GNSS) positioning.

All chapters (abstract, introduction, multipath for Galileo, methodology, multipath analysis and discussion) are very well described and they do not raise any doubts. In terms of the literature review is sufficient (38 positions), all of which are papers from recognized scientific conferences and journals, such as: GPS Solutions, International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS), Sensors, and others. Moreover, I would like to point out that the papers cited are related to the subject of this article (GNSS, multipath, Galileo, Code-Minus-Carrier combination and time-frequency). However, please read the publication several times to remove any typos, e.g. in lines 376 and 386.

To sum up, I suppose that this article is suitable for publication in the Remote Sensing.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 3 Report

Dear Authors,

I'm happy will all of the changes that you have incorporated into the manuscript. I strongly believe that the current version of the manuscript is much better.

Best regards