Characterization of the OCO-2 instrument line shape functions using on-orbit solar measurements

Sun, Kang; Liu, Xiong; Nowlan, Caroline R.; Cai, Zhaonan; Chance, Kelly; Frankenberg, Christian; Lee, Richard A. M.; Pollock, Randy; Rosenberg, Robert; Crisp, David

doi:https://doi.org/10.5194/amt-10-939-2017

Articles | Volume 10, issue 3

https://doi.org/10.5194/amt-10-939-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/amt-10-939-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 10, issue 3

Research article

|

10 Mar 2017

Research article |

| 10 Mar 2017

Characterization of the OCO-2 instrument line shape functions using on-orbit solar measurements

Kang Sun, Xiong Liu, Caroline R. Nowlan, Zhaonan Cai, Kelly Chance, Christian Frankenberg, Richard A. M. Lee, Randy Pollock, Robert Rosenberg, and David Crisp

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Final revised paper (published on 10 Mar 2017)
Preprint (discussion started on 14 Nov 2016)

Interactive discussion

Status: closed

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

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RC1: '...', Anonymous Referee #2, 11 Jan 2017
- AC1: 'Reply to comments from referee #2', Kang Sun, 14 Feb 2017
RC2: '“Characterization of the OCO-2 instrument line shape functions using on-orbit solar measurements” by K. Sun et al.', Anonymous Referee #1, 20 Jan 2017
- AC2: 'Reply to comments from referee #1', Kang Sun, 14 Feb 2017

Short summary

Accurately characterizing the instrument line shape (ILS) of the Orbiting Carbon Observatory-2 (OCO-2) is challenging and highly important due to its high spectral resolution and requirement for retrieval accuracy. Measured ILS during preflight experiments has been used in the OCO-2 CO₂ retrieval. This study derives the on-orbit ILS of OCO-2 using its solar measurements and answers the questions whether on-orbit ILS has changed compared to preflight and whether it varies during the mission.