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Balloon-borne far-infrared Michelson interferometer for atmospheric emission studies
Applied Optics
|March 9, 2010
Summary
Researchers developed far-infrared Michelson interferometers for stratospheric measurements. These instruments provide high-resolution emission spectra, crucial for monitoring trace gases in the stratosphere.
Area of Science:
- Atmospheric science
- Spectroscopy
- Instrument development
Background:
- Stratospheric trace gas concentrations are critical for atmospheric chemistry and climate.
- Accurate measurement of stratospheric emission spectra is essential for understanding atmospheric processes.
- Existing instrumentation may have limitations in resolution or spectral range for detailed analysis.
Purpose of the Study:
- To design and construct advanced far-infrared Michelson interferometers for balloon-borne stratospheric measurements.
- To present the design criteria and evolution of these specialized instruments.
- To demonstrate the capability of the instrumentation for obtaining high-resolution stratospheric emission spectra.
Main Methods:
- Utilized rapid-scanning Michelson interferometers for far-infrared spectroscopy.
- Incorporated liquid helium-cooled bolometer detector systems for enhanced sensitivity.
- Implemented internal blackbody calibration and atmospheric limb-scanning techniques.
- Performed balloon-borne measurements of stratospheric emission spectra.
Main Results:
- Successfully designed and built far-infrared Michelson interferometers.
- Obtained stratospheric emission spectra between 30 cm(-1) and 110 cm(-1) at a resolution of 0.07 cm(-2).
- Demonstrated the effectiveness of the instrumentation for atmospheric limb-scanning.
Conclusions:
- The developed interferometers are suitable for precise stratospheric emission spectrum measurements.
- This instrumentation offers a valuable tool for monitoring stratospheric trace gas constituents.
- The high-resolution spectral data can contribute to a better understanding of stratospheric chemistry and dynamics.
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