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Balloonborne calibrated spectroradiometer for atmospheric nadir sounding
Yao Té1, Pascal Jeseck, Claude Camy-Peyret
1Laboratoire de Physique Moléculaire et Applications, Centre National de la Recherche Scientifique, Université Pierre et Marie Curie, Paris, France. te@lpma.jussieu.fr
Applied Optics
|October 25, 2002
Summary
The Laboratoire de Physique Moléculaire et Applications (LPMA)/Infrared Atmospheric Sounding interferometer (IASI) balloon instrument successfully measured atmospheric emission. This validated radiometric calibration for trace gas retrieval, aiding the IASI satellite mission.
Area of Science:
- Atmospheric Science
- Spectroscopy
- Earth Observation
Background:
- The Infrared Atmospheric Sounding interferometer (IASI) is a satellite instrument for operational meteorology.
- Accurate atmospheric measurements are crucial for understanding Earth's climate and composition.
- Calibrated infrared spectroscopy from stratospheric platforms offers high-fidelity data.
Purpose of the Study:
- To describe the LPMA/IASI balloon instrument and its performance.
- To validate radiometric calibration procedures for atmospheric trace gas retrieval.
- To prepare for the operational IASI satellite mission.
Main Methods:
- Utilized a calibrated infrared Fourier transform spectrometer on a stratospheric balloon.
- Measured Earth's atmospheric emission in the 650-3000 cm(-1) range.
- Employed two reference blackbodies for radiometric calibration, including a novel LPMA blackbody cavity.
Main Results:
- Achieved high spectral resolution (0.1 cm(-1) apodized) and radiometric calibration.
- Demonstrated the capability to retrieve concentrations of key trace gases (H2O, CO2, CO, O3, N2O, CH4).
- Presented results from the instrument's first successful flight.
Conclusions:
- The LPMA/IASI balloon instrument is a reliable tool for atmospheric measurements.
- The validated calibration procedures are essential for accurate trace gas quantification.
- The instrument's performance supports the objectives of the IASI satellite mission for meteorology.