Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Precision heterodyne oxygen-corrected spectrometry: vertical profiling of water and carbon dioxide in the troposphere and lower stratosphere

Abstract

We describe the development of a near-infrared laser heterodyne radiometer: the precision heterodyne oxygen-corrected spectrometer (PHOCS). The prototype instrument is equipped with two heterodyne receivers for oxygen and water (measured near 1278 nanometers) and carbon dioxide (near 1572 nanometers) concentration profiles, respectively. The latter may be substituted by a heterodyne receiver module equipped with a laser to monitor atmospheric methane near 1651 nanometers. Oxygen measurements are intended to provide dry gas corrections and—more importantly—determine accurate temperature and pressure profiles that, in turn, improve the precision of the ${{\rm CO}_2}$ and ${{\rm H}_2}{\rm O}$ column retrievals. Vertical profiling is made feasible by interrogating the very low-noise absorption lines shapes collected at $ \approx {0.0067}\;{{\rm cm}^{ - 1}}$ resolution. PHOCS complements the results from the Orbiting Carbon Observatory (OCO-2), Active Sensing of ${{\rm CO}_2}$ Emissions over Nights, Days, and Seasons (ASCENDS), and ground-based Fourier transform spectrometers. In this paper, we describe the development of the instrument by Mesa Photonics and present the results of initial tests in the vicinity of  Washington, DC.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
High-resolution oxygen-corrected laser heterodyne radiometer (LHR) for stratospheric and tropospheric wind field detection

Jun Li, Zhengyue Xue, Fengjiao Shen, Guishi Wang, Kun Liu, Weidong Chen, Xiaoming Gao, and Tu Tan
Opt. Express 31(5) 7850-7862 (2023)

Development of a laser heterodyne radiometer for regional methane leak detection

Andrew D. Sappey, Bernard P. Masterson, and James Howell
Appl. Opt. 61(10) 2697-2705 (2022)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved