High Resolution In situ-Remote Laser Spectrometer (HIRLS)

Details High Resolution In situ-Remote Laser Spectrometer (HIRLS) High Resolution In situ-Remote Laser Spectrometer (HIRLS)

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.3410k&link_type=abstract

American Astronomical Society, DPS meeting #39, #34.10; Bulletin of the American Astronomical Society, Vol. 39, p.480

Astronomy and Astrophysics

Astronomy

Scientific paper

An extremely high resolution spectrometer in the 6-13 µm wavelength region will be described. It has the unique capability to probe planetary atmospheres both in situ and remotely from landed or aerial platforms and remotely from orbit. Quantum cascade lasers are used as local oscillators for remote measurements with infrared heterodyne spectroscopy and as sources for in situ laser absorption spectroscopy. The heterodyne component has the unique capability to measure winds directly (to m/sec), determine molecular composition and isotopic ratios, retrieve temperature, and investigate atmospheric non-thermal phenomena (e.g., natural lasing). It can probe the mesosphere/thermosphere of Mars, Venus, Earth, and the upper stratosphere of Titan and the outer planets. The laser absorption spectroscopy component can determine species abundances and isotopic ratios near planetary surfaces and at lower altitudes, providing important information for planetary evolution and detection of biogenic activity. Ultra-high resolving power in both techniques (λ/Δλ>106) enables accurate and unambiguous identification of minor molecular and isotopic constituents. The optical design, laboratory set-up, and initial tests will be presented.
This work was supported by the GSFC IRAD Program

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