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Remote Sensing
Volume 14
Issue 15
10.3390/rs14153595
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Article
Peer-Review Record

Effect of Stochastic Modeling for Inter-Frequency Biases of Receiver on BDS-3 Five-Frequency Undifferenced and Uncombined Precise Point Positioning

Remote Sens. 2022, 14(15), 3595; https://doi.org/10.3390/rs14153595
by Yi Liu 1,2, Wei Zhou 1,*, Bing Ji 1, Deying Yu 1, Shaofeng Bian 1, Shouzhou Gu 2 and Deyan Li 1
Reviewer 1:
Yunbin Yuan
Reviewer 2:
Yavor Chapanov
Remote Sens. 2022, 14(15), 3595; https://doi.org/10.3390/rs14153595
Submission received: 16 June 2022 / Revised: 16 July 2022 / Accepted: 22 July 2022 / Published: 27 July 2022
(This article belongs to the Special Issue GNSS Precise Positioning and Geoscience Application)

Round 1

Reviewer 1 Report

There are the following several questions regarding the manuscript.

1.      Generally, the assessment of IFB requires long-term observation data. This paper is based on single day data, which is not convincing.

2.      Abstract, line 21: “The IFB stochastic modeling method based on random walks …” is repeated with the following sentence, and it is suggested to modify it.

3.      Line 34: “Previous studies have shown that multi-frequency positioning can eliminate errors and improve accuracy.” Please quote relevant literature to illustrate this problem.

4.      Line 141: “In this section, we mainly introduce my experimental protocol and experimental data.” "My" is not appropriate here.

5.      Line 156: “When the standardized residual of the phase observation exceeds greater than 5, …” Please elaborate on this sentence.

6.      Line 169: The ionosphere is estimated as a random walk parameter, but several stations in this paper are near the equator. Is this related to the fact that IFB has no effect on the ionosphere?

7.      How to determine the random walk spectral density of IFB?

8.      When investigating the impact of IFB on positioning, it should be compared with the model without considering IFB. Moreover, based on the three models in this paper, it cannot be seen that modeling IFB as random walk has a significant improvement in positioning accuracy and convergence speed.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

I recommend small edition of text before the accept.

1. Figures 3 and 4 represent repeated information in item (b) and (c). The 3 parts of Figures - (a), (b) and (c) are almost identical and give no individual information to the readers. It is enough to leave item (a) only, and small numerical differences to place into a table.

2. In Conclusions: Emphasize the main result, is it applicable to the geodetic practice, and what is its significance to the the theory and real processing of observations?

Author Response

Please see the attachment.

Author Response File: Author Response.docx

This manuscript is a resubmission of an earlier submission. The following is a list of the peer review reports and author responses from that submission.


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