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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 25 — Sep. 1, 1999
  • pp: 5338–5349

MASERATI: a RocketBorne Tunable Diode Laser Absorption Spectrometer

Franz-Josef Lübken, Florian Dingler, Henrich von Lucke, Joachim Anders, Wolfgang J. Riedel, and Helmut Wolf  »View Author Affiliations


Applied Optics, Vol. 38, Issue 25, pp. 5338-5349 (1999)
http://dx.doi.org/10.1364/AO.38.005338


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Abstract

The MASERATI (middle-atmosphere spectrometric experiment on rockets for analysis of trace-gas influences) instrument is, to our knowledge, the first rocket-borne tunable diode laser absorption spectrometer that was developed for in situ measurements of trace gases in the middle atmosphere. Infrared absorption spectroscopy with lead salt diode lasers is applied to measure water vapor and carbon dioxide in the altitude range from 50 to 90 km and 120 km, respectively. The laser beams are directed into an open multiple-pass absorption setup (total path length 31.7 m) that is mounted on top of a sounding rocket and that is directly exposed to ambient air. The two species are sampled alternately with a sampling time of 7.37 ms, each corresponding to an altitude resolution of approximately 15 m. Frequency-modulation and lock-in techniques are used to achieve high sensitivity. Tests in the laboratory have shown that the instrument is capable of detecting a very small relative absorbance of 10−4–10−5 when integrating spectra for 1 s. The instrument is designed and qualified to resist the mechanical stress occurring during the start of a sounding rocket and to be operational during the cruising phase of the flight when accelerations are very small. Two almost identical versions of the MASERATI instrument were built and were launched on sounding rockets from the Andøya Rocket Range (69 °N) in northern Norway on 12 October 1997 and on 31 January 1998. The good technical performance of the instruments during these flights has demonstrated that MASERATI is indeed a new suitable tool to perform rocket-borne in situ measurements in the upper atmosphere.

© 1999 Optical Society of America

OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(140.2020) Lasers and laser optics : Diode lasers
(300.1030) Spectroscopy : Absorption
(300.6260) Spectroscopy : Spectroscopy, diode lasers

Citation
Franz-Josef Lübken, Florian Dingler, Henrich von Lucke, Joachim Anders, Wolfgang J. Riedel, and Helmut Wolf, "MASERATI: a RocketBorne Tunable Diode Laser Absorption Spectrometer," Appl. Opt. 38, 5338-5349 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-25-5338

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