Single-Epoch Ambiguity Resolution of a Large-Scale CORS Network with Multi-Frequency and Multi-Constellation GNSS

Round 1

Reviewer 1 Report

Thank you for the interesting work. The manuscript is well structured and easy to follow. This manuscript proposes single-epoch ambiguity resolution of a large-scale CORS network with multi-frequency and multi-constellation GNSS. However, the method and theory has been proposed many years ago. And it is not clear what is the contribution of the authors. The manuscript needs improvements before having a chance of being accepted for publication.

 

1.       The language needs to be improved. There are many inappropriate expressions. Please read through the paper and carefully polish the language.

2.       In Section 3, what is the point of the first paragraph? “This section may be divided by subheadings. It should provide a concise and precise description of the experimental results, their interpretation, as well as the experimental conclusions that can be drawn”

3.       In figure 12, it seems that a lot of the data cannot be used for your processing.

4.       In addition, it would be nice to see more experiments, e.g., with more data and stations. Anyway, it is not difficult for you to collect the data since IGS station is used.

5.       The reference is not enough. The multi-frequency ambiguity resolution methods have been proposed for many years and in many publications. Only 8 references is obviously short.

Author Response

We are grateful for your comments. All the comments are addressed, and modified in the revised manuscript.

1. The language needs to be improved. There are many inappropriate expressions. Please read through the paper and carefully polish the language.

Reply: The language is improved as suggested. Thanks.

2. In Section 3, what is the point of the first paragraph? “This section may be divided by subheadings. It should provide a concise and precise description of the experimental results, their interpretation, as well as the experimental conclusions that can be drawn”

Reply: The first paragraph is deleted. Thank you for your comments.

3. In figure 12, it seems that a lot of the data cannot be used for your processing.

Reply: Yes, there are moments when the ZPD differences between two stations are abnormal and they are not easy to be neglected. They may be due to the special weather conditions, which need further research in future. But they are less than 1%, therefore have little effect on performance. Thank you for your comments.

4. In addition, it would be nice to see more experiments, e.g., with more data and stations. Anyway, it is not difficult for you to collect the data since IGS station is used.

Reply: Another fifteen-day observations of baseline BAUT-LEIJ with a distance about 151 km are tested. Thank you for your suggestion.

5. The reference is not enough. The multi-frequency ambiguity resolution methods have been proposed for many years and in many publications. Only 8 references is obviously short.

Reply: New related references are added.

Reviewer 2 Report

 Ji et al have investigated the Single-epoch ambiguity resolution of a large-scale CORS network with multi-frequency and multi-constellation GNSS.The topic is worthy of study. The authors have presented various useful results. I think the manuscript can be accepted. 

Author Response

Thanks for your comments.

Reviewer 3 Report

Corrections are given in the PDF document.

Comments for author File: Comments.pdf

Author Response

We are grateful for your comments. All the comments are addressed, and modified in the new version of manuscript.

1. Corrections are given in the PDF document.

Reply: All corrections are corrected as suggested. Thank you very much.

2. Other comments

Reply: New references are add in References, English is proofread.

Round 2

Reviewer 1 Report

None