A New Method for Retrieving Electron Density Profiles from the MARSIS Ionograms
, Yiding Chen 1,2,3, Huijun Le 1,2,3, Ruilong Zhang 1,2,3, Wenbo Li 1,2,3, Jiacheng Li 1,2,3, Tongtong Zhang 1,2,3, Yuyan Yang 1,2,3 and Han Ma 1,2,3
Ildiko Horvath
Round 1
Reviewer 1 Report
- Page 2, lines 44-51. MAVEN embarks more than the NGIMS instrument for the study of the ionosphere. Please add (radio science ROSE, Langmuir probe etc...). Add also that MEX uses the radio occultation techniques.
- Figure 3: I dont understand the panel which provides the error as a function of the radar frequency. What is that? Please justify in the text.
- For the validation of the method, I recommend to add a plot where you show, for a MARSIS data with a local frequency, your method applied assuming there is no local frequency, and you compare the result, to see if you have a good estimation of the profile up to the spacecraft altitude. A bit like Fig4, but for the same orbit.
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Reviewer 2 Report
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Reviewer 3 Report
Comments to the manuscript remotesensing-1666915
A New Method For Retrieving Electron Density Profiles From 2 The MARSIS Ionograms
by Wendong Liu, Libo Liu, Yiding Chen, Huijun Le, Ruilong Zhang, Wenbo Li, Jiacheng Li,Tongtong Zhang, Yuyan Yang and Han Ma
Interest in the exploration of Mars is constantly growing. One of the directions of this research is the study of the ionosphere. As follows from the review of the authors, this study has been going on for several decades, but the authors managed to take a step forward. The paper is devoted to the determination of N(h)-profiles of the Martian ionosphere according to the MARSIS experiment. A method is proposed that does not depend on the presence or absence of local plasma density oscillation, which makes it possible to increase the base of profiles. The paper corresponds to the topics of the journal, is of interest to readers and can be recommended for publication. However, there are a couple of questions and a few shortcomings seen.
Questions
- How are apparent range and virtual height related?
- Line 164, equation (3): what does the parameter T mean?
Shortcomings
- Line 165: replace number of the point with number of the points.
- Line 169: swap value and values.
- Line 272, caption to Figure 5: the phrase of paragraph (b) is not clear.
- Line 278: replace mode with model.
- Line 354: Replace Bamett with Barnett.
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