A 4 U laser heterodyne radiometer for methane (CH4) and carbon dioxide (CO2) measurements from an occultation-viewing CubeSat

作者：Wilson Emily L^*; DiGregorio A J; Riot Vincent J; Ammons Mark S; Bruner William W; Carter Darrell; Mao Jianping; Ramanathan Anand; Strahan Susan E; Oman Luke D; Hoffman Christine; Garner Richard M

来源：Measurement Science and Technology, 2017, 28(3): 035902.

DOI：10.1088/1361-6501/aa5440

• laser heterodyne radiometer
• CubeSat
• carbon dioxide
• methane
• water vapor
• occultation
• greenhouse gases

We present a design for a 4 U (20 cm x 20 cm x 10 cm) occultation-viewing laser heterodyne radiometer (LHR) that measures methane (CH4), carbon dioxide (CO2) and water vapor (H2O) in the limb that is designed for deployment on a 6 U CubeSat. The LHR design collects sunlight that has undergone absorption by the trace gas and mixes it with a distributive feedback (DFB) laser centered at 1640 nm that scans across CO2, CH4, and H2O absorption features. Upper troposphere/lower stratosphere measurements of these gases provide key inputs to stratospheric circulation models: measuring stratospheric circulation and its variability is essential for projecting how climate change will affect stratospheric ozone.

• 出版日期2017-3