Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 18, issue 18
Articles | Volume 18, issue 18
https://doi.org/10.5194/amt-18-4593-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-4593-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 18
Research article
 | 
18 Sep 2025
Research article |  | 18 Sep 2025

JLH Mark2 – An Improved Opto-Mechanical Approach to Open-Path in situ Water Vapor Measurement in the Upper Troposphere/Lower Stratosphere

Robert L. Herman, Robert F. Troy, Kim M. Aaron, Isabelle Sanders, Kevin Schwarm, Joshua Eric Klobas, Aaron Swanson, Andrew Carpenter, Scott Ozog, Keith Chin, Lance E. Christensen, Dejian Fu, Robert F. Jarnot, Robert A. Stachnik, and Ramabhadran Vasudev

Viewed

Total article views: 3,679 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
2,736 761 182 3,679 175 210
  • HTML: 2,736
  • PDF: 761
  • XML: 182
  • Total: 3,679
  • BibTeX: 175
  • EndNote: 210
Views and downloads (calculated since 10 Jan 2025)
Cumulative views and downloads (calculated since 10 Jan 2025)

Viewed (geographical distribution)

Total article views: 3,679 (including HTML, PDF, and XML) Thereof 3,619 with geography defined and 60 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 14 Sep 2026
Download
Short summary
This paper presents a new opto-mechanical design for an airborne atmospheric water vapor sensor, the Jet Propulsion Laboratory Laser Hygrometer (JLH) Mark2. The design maximizes instrument optical stability over the wide range of temperatures experienced during flight. We demonstrate that key changes in the redesigned instrument have significantly improved the performance and precision of water vapor measurements. We did this research to enable improved scientific instrumentation for aircraft.
Read more
Share