Compact Setup of a Tunable Heterodyne Spectrometer for Infrared Observations of Atmospheric Trace-Gases
AbstractWe report on the development and characterization of the new compact infrared heterodyne receiver, iChips (Infrared Compact Heterodyne Instrument for Planetary Science). It is specially designed for ground-based observations of the terrestrial atmosphere in the mid-infrared wavelength region. Mid-infrared room temperature quantum cascade lasers are implemented into a heterodyne system for the first time. Their tunability allows the instrument to operate in two different modes. The scanning mode covers a spectral range of few wavenumbers continuously with a resolution of approximately ν/∆ν ≥ 105. This mode allows the determination of the terrestrial atmospheric transmission. The staring mode, applied for observations of single molecular transition features, provides a spectral resolution of ν/∆ν ≥ 107 and a bandwidth of 1.4 GHz. To demonstrate the instrument's capabilities, initial observations in both modes were performed by measuring the terrestrial transmittance at 7.8 µm (∼ 1,285 cm−1) and by probing terrestrial ozone features at 8.6 µm (∼ 1,160 cm−1), respectively. The receivers characteristics and performance are described. View Full-Text
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Stangier, T.; Sonnabend, G.; Sornig, M. Compact Setup of a Tunable Heterodyne Spectrometer for Infrared Observations of Atmospheric Trace-Gases. Remote Sens. 2013, 5, 3397-3414.
Stangier T, Sonnabend G, Sornig M. Compact Setup of a Tunable Heterodyne Spectrometer for Infrared Observations of Atmospheric Trace-Gases. Remote Sensing. 2013; 5(7):3397-3414.Chicago/Turabian Style
Stangier, Tobias; Sonnabend, Guido; Sornig, Manuela. 2013. "Compact Setup of a Tunable Heterodyne Spectrometer for Infrared Observations of Atmospheric Trace-Gases." Remote Sens. 5, no. 7: 3397-3414.