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Remote Sensing
Volume 15
Issue 10
10.3390/rs15102639
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Article
Peer-Review Record

Evaluation of Temporal Stability in Radiometric Calibration Network Sites Using Multi-Source Satellite Data and Continuous In Situ Measurements

Remote Sens. 2023, 15(10), 2639; https://doi.org/10.3390/rs15102639
by Enchuan Qiao 1,2, Chao Ma 1, Hao Zhang 2,*, Zhenzhen Cui 1,2 and Chenglong Zhang 2,3
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Remote Sens. 2023, 15(10), 2639; https://doi.org/10.3390/rs15102639
Submission received: 7 April 2023 / Revised: 8 May 2023 / Accepted: 16 May 2023 / Published: 18 May 2023
(This article belongs to the Special Issue Quantitative Integration for Multi-source Remote Sensing Data: Theory, Methods, and Applications)

Round 1

Reviewer 1 Report

Please check the attached PDF.

Comments for author File: Comments.pdf

The information provided by the authors in this is vague and not convincing enough.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

The manuscript is devoted to the important problem of calibration of satellite cameras using PICS. For this, it is necessary to control the temporal stability of these sites. This is exactly what was done in the work. I think the article could be published. However, I have some comments regarding section 2.5 BRDF-Adjusted Reflectance:

1. The authors use the 15-parameter model Eq. (2). The values of β parameters is a characteristic of the structure and composition of the PICS surface. So they should be different for different PICS. In addition, β parameters can change over time depending on the surface condition. However, the authors do not give the values of β parameters at all and do not write how these values were obtained. If the values of the parameters was obtained from observations during this study, then it is worth writing about it in more detail and presenting the obtained β values. If the values was taken from the literature, the source should be indicated. If the parameter values were taken to be the same for different PICS and/or they were constant over time, it is worth analyzing what error this could lead to.

2. In line 235 it is said that "the site data were measured from the nadir". It is not correct. Both Landsat and Sentinel-2 have a finite field of view, so different image pixels have different zenith angles of view. Was this taken into account?

 

Author Response

Please see the attachment.

I'm sorry for resubmitting it because we made a change in the article, specifically submitting the β-parameter values as supplementary materials.

Please refer to the "remotesensing-2362130-review2-reply-change" file.

Author Response File: Author Response.docx

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