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Related Concept Videos

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
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An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
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Related Experiment Video

Updated: Jul 6, 2026

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
09:40

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MASERATI: a RocketBorne tunable diode laser absorption spectrometer.

F J Lübken1, F Dingler, H von Lucke

  • 1Physikalisches Institut, Universität Bonn, Nussallee 12, 53115 Bonn, Germany. luebken@physik.uni-bonn.de

Applied Optics
|March 8, 2008
PubMed
Summary
This summary is machine-generated.

The MASERATI instrument, a rocket-borne tunable diode laser absorption spectrometer, successfully measured water vapor and carbon dioxide in the middle atmosphere. This new tool enables precise in situ trace gas analysis in the upper atmosphere.

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Area of Science:

  • Atmospheric science
  • Spectroscopy
  • Rocket instrumentation

Background:

  • Middle atmosphere trace gas composition is crucial for understanding atmospheric processes.
  • In situ measurements provide direct atmospheric sampling, crucial for validating remote sensing data.
  • Previous rocket-borne instruments had limitations in sensitivity and specificity for certain trace gases.

Purpose of the Study:

  • To introduce and validate the MASERATI instrument for in situ trace gas measurements in the middle atmosphere.
  • To demonstrate the capability of measuring water vapor and carbon dioxide at high altitudes.
  • To assess the instrument's performance under the harsh conditions of a sounding rocket launch and flight.

Main Methods:

  • Development of a rocket-borne tunable diode laser absorption spectrometer (MASERATI).
  • Utilized infrared absorption spectroscopy with lead salt diode lasers.
  • Employed a multiple-pass absorption setup directly exposed to ambient air.
  • Incorporated frequency-modulation and lock-in techniques for high sensitivity.

Main Results:

  • Successfully measured water vapor (50-90 km) and carbon dioxide (up to 120 km).
  • Achieved an altitude resolution of approximately 15 m.
  • Demonstrated high sensitivity, detecting relative absorbance of 10(-4)-10(-5).
  • Instrument withstood mechanical stress during rocket launch and operated effectively during flight.

Conclusions:

  • MASERATI is a novel and effective tool for rocket-borne in situ measurements of trace gases in the upper atmosphere.
  • The instrument's performance validates its suitability for atmospheric research.
  • This technology advances the capability for detailed atmospheric composition analysis.