Methodology for deriving the telescope focus function and its uncertainty for a heterodyne pulsed Doppler lidar

Pentikäinen, Pyry; O'Connor, Ewan James; Manninen, Antti Juhani; Ortiz-Amezcua, Pablo

doi:https://doi.org/10.5194/amt-13-2849-2020

Articles | Volume 13, issue 5

https://doi.org/10.5194/amt-13-2849-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Tropospheric profiling (ISTP11) (AMT/ACP inter-journal SI)

https://doi.org/10.5194/amt-13-2849-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 13, issue 5

Research article

|

29 May 2020

Research article |

| 29 May 2020

Methodology for deriving the telescope focus function and its uncertainty for a heterodyne pulsed Doppler lidar

Pyry Pentikäinen, Ewan James O'Connor, Antti Juhani Manninen, and Pablo Ortiz-Amezcua

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Final revised paper (published on 29 May 2020)
Preprint (discussion started on 09 Jan 2020)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC1: 'attenuated backscatter profiles determined from wind lidar SNR profiles', Anonymous Referee #1, 30 Jan 2020
- AC1: 'Author response to referee 1', Pyry Pentikainen, 27 Mar 2020
RC2: 'Comments on the article "Methodology for deriving the telescope focus function and its uncertainty for a heterodyne pulsed Doppler lidar" by Pentikainen et al.', Anonymous Referee #2, 14 Feb 2020
- AC2: 'Author response to referee 2', Pyry Pentikainen, 27 Mar 2020

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Pyry Pentikainen on behalf of the Authors (27 Mar 2020) Author's response Manuscript

ED: Publish subject to minor revisions (review by editor) (08 Apr 2020) by Pauline Martinet

I appreciate your clear answers to the reviewers remarks but I would suggest to answer some minor remarks from the reviewers directly in the manuscript (and not only in their answers). Could you please take into account the following corrections to be brought to the manuscript before publication:

p5, line 11 : as you included a new section about the impact of the turbulent parameter (rho).
Could you just refer to section 4.2 to mention that it will be discussed later in the manuscript ?

p6, ligne3 : Could you please clarify why the interpolation is needed to follow reviewer 1, minor remark number 3.Instead of writing « when necessary » you could re-use the answer you made to the reviewer

p6, line3 : additionally to the reference for the SNR threshold used in the paper, could you also include one part of your answer that you did to reviewer 1 and 2 to explain the choice of this threshold.

P10, legend of table 3 : can you clarify what is included in the total estimates to answer reviewer 1, major remark number 1 ? It could be something like :
total estimates is the number of profiles without clouds, precipitation and multiple aerosol layer, good estimates is the number of good estimates after outlier removal using MAD.

p12, figure4 a) : what does arbitrary unit means ?

P19, line 22: please correct "should included" by "should be included"

In line with reviewer 1, major remark number 3, could you mention somewhere in the manuscript that thanks to your method, after deriving the telescope focus function from a short-period with a co-located ceilometer, the Doppler lidar can be moved to another place not equipped with a co-located ceilometer but still able to provide both winds profils and attenuated backscatter profiles.

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AR by Pyry Pentikainen on behalf of the Authors (09 Apr 2020) Author's response Manuscript

ED: Publish as is (27 Apr 2020) by Pauline Martinet

AR by Pyry Pentikainen on behalf of the Authors (29 Apr 2020)

Short summary

We provide a methodology for obtaining a function describing how the Doppler lidar telescope configuration impacts the measurements. Together with the function itself, we also provide the uncertainties in the function, which propagate through to provide uncertainties in the geophysical quantities obtained from the measurements. The method can be used to determine how stable the instrument is over time and also identify if changes have been made in the instrument setup.