Compact echelle spectrometer for occultation sounding of the Martian atmosphere: design and performance

Korablev, Oleg; Montmessin, Franck; Trokhimovsky, Alexander; Fedorova, Anna; Kiselev, Alexander V.; Bertaux, Jean-Loup; Goultail, Jean-Pierre; Belyaev, Denis; Stepanov, A. V.; Титов, А. Н.; Kalinnikov, Yurii K.

doi:10.1364/ao.52.001054

Cited by 21 publications

(10 citation statements)

References 37 publications

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“…The atmosphere was observed from the pressurized compartment of ISS through illuminators. Also, a simplified version of SOIR aimed to study the minor constituents of the Martian atmosphere was developed and launched on board unsuccessful Phobos Grunt Russian mission (2011) [20]. Recently three échelle-AOTF instruments have been launched onboard ExoMars Trace Gas Orbiter.…”

Section: The Aotfs In Spacementioning

confidence: 99%

“…The near-Infrared echelle-AOTF spectrometer is one channel of the Atmospheric Chemistry Suite (ACS) package dedicated for the studies of the Martian atmosphere on board ExoMars Trace Gas Orbiter launched in 2016 [20]. The near-infrared (NIR) channel of ACS is a versatile spectrometer for the spectral range of 0.7-1.6 µm with a resolving power of >20,000.…”

Section: An Imaging Echelle-aotf Spectrometermentioning

confidence: 99%

“…Spectral resolution is limited by the slit width and aberrations of the off-axis parabolic collimator. The spectral resolving power is defined by the spread function width and variable over the detector [20], but remains always ≥ 20,000. The spread function width changes very slightly along the slit, and this determines almost constant spatial resolution for each wavelength.…”

Section: An Imaging Echelle-aotf Spectrometermentioning

confidence: 99%

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AOTF spectrometers in space missions and their imaging capabilities

Korablev¹,

Trokhimovsky²,

Kalinnikov

2017

International Conference on Space Optics — ICSO 2016

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Section: The Aotfs In Spacementioning

confidence: 99%

Section: An Imaging Echelle-aotf Spectrometermentioning

confidence: 99%

Section: An Imaging Echelle-aotf Spectrometermentioning

confidence: 99%

See 1 more Smart Citation

AOTF spectrometers in space missions and their imaging capabilities

Korablev¹,

Trokhimovsky²,

Kalinnikov

2017

International Conference on Space Optics — ICSO 2016

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“…In the precursor compact echelle-spectrometer [5] for the same purpose we have used a segment of Klevtsov-Cassegrain design, a fully spherical combination of a primary mirror and a sub-aperture corrector, a meniscus and a Mangin mirror. In the MIR collimator the both mirrors are aspherical.…”

Section: Icso 2014 Tenerife Canary Islands Spain International Confmentioning

confidence: 99%

“…Its design capitalizes on the previous developments of high technology readiness: two instruments built for unsuccessful Phobos-Grunt project [4][5][6] and one instrument flown at the ISS in 2009-2012 [7]. Some components/subsystems are contributed by German Institut für Planetenforschung (DLR) and LATMOS…”

Section: Introductionmentioning

confidence: 99%

High resolution middle infrared spectrometer, a part of atmospheric chemistry suite (ACS) for EXOMARS 2016 trace gas orbiter

Trokhimovskiy

Korablev

Ivanov

et al. 2017

International Conference on Space Optics — ICSO 2014

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The Atmospheric Chemistry Suite (ACS) package is a part of Russian contribution to ExoMars ESARoscosmos mission for studies of the Martian atmosphere and climate. ACS consists of three separate infrared spectrometers, sharing common mechanical, electrical, and thermal interfaces. The mid-infrared (MIR) channel is a cross-dispersion high resolution echelle instrument dedicated to solar occultation measurements and sensitive studies of trace gases. The MIR channel is a spectrometer working in 2.3-4.2 µm spectral range, covering simultaneously up to almost 300 nm per exposure, targeting the resolving power of 50,000. A crossdispersion concept on echelle and ordinary diffraction grating allows acquisition of the wide wavelength domain at once. That provides a strategic advantage for maximizing the number of gaseous species detected simultaneously and good special resolution of measurements during fast occultation sessions. Moving the second grating allows to switch from one group of the diffraction orders to another prior to a series of measurements, or desired positions during one measurement sequence. The concept of the cross-dispersion echelle instrument, which is widely accepted in astronomy, has been already employed in planetary missions with VIRTIS-H instrument presently in flight on Rosetta and Venus Express missions.Targeting very high spectral resolution the MIR channel operates in solar occultation only. A telescope with relative aperture of 1:3 forms the image of the solar disk on the slit. The FOV is determined by the slit and it consists 0.1×2.9 mrad. The spectral resolution of the spectrometer is fully slit-limited, and the resolving power of λ/Δλ ≥ 50000 at 3.3 µm is supported. Two secondary cross-dispersion diffraction gratings (plain, 180 and 361 grooves per mm) are mounted back-to-back on a stepper motor to change observed echelle orders. We have chosen two secondary gratings philosophy to switch between them depending on the long or short wavelength range we are on. Changing the position of the secondary grating in angular steps of 1.8°, from 10 to 30 echelle orders are available for simultaneous record depending on the wavelength. 100 steps are evidently used to switch between gratings prior measurements. The full spectral range is covered on diffraction orders from 142 to 248. For each observation detector area is covered by 10 to 30 stripes, each corresponding to single echelle diffraction order. Given the complexity of the diffraction orders pattern, full detector frames will be transmitted to the ground, with lossless compression. However, the onboard averaging will be possible. Single data frame will be accumulated for 0.5 seconds, stacking of a number of shorter exposures.

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The Atmospheric Chemistry Suite (ACS) of Three Spectrometers for the ExoMars 2016 Trace Gas Orbiter

et al. 2017

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The Atmospheric Chemistry Suite (ACS) package is an element of the Russian contribution to the ESA-Roscosmos ExoMars 2016 Trace Gas Orbiter (TGO) mission. ACS consists of three separate infrared spectrometers, sharing common mechanical, electrical, and thermal interfaces. This ensemble of spectrometers has been designed and developed in response to the Trace Gas Orbiter mission objectives that specifically address the requirement of high sensitivity instruments to enable the unambiguous detection of trace gases of potential geophysical or biological interest. For this reason, ACS embarks a set of instruments achieving simultaneously very high accuracy (ppt level), very high resolving power (>10,000) and large spectral coverage (0.7 to 17 µm-the visible to thermal infrared range). The near-infrared (NIR) channel is a versatile spectrometer covering the 0.7-1.6 µm spectral range with a resolving power of ∼20,000. NIR employs the combination of an echelle grating with an AOTF (Acousto-Optical Tunable Filter) as diffraction order selector. This channel will be mainly operated in solar occultation and nadir, and can also perform limb observations. The scientific goals of NIR are the measurements of water vapor, aerosols, and dayside or night side airglows. The mid-infrared (MIR) channel is a cross-dispersion echelle instrument dedicated to solar occultation measurements in the 2.2-4.4 µm range. MIR achieves a resolving power of >50,000. It has been designed to accomplish the most sensitive measurements ever of the trace gases present in the Martian atmosphere. The thermal-infrared channel (TIRVIM) is a 2-inch double pendulum Fourier-transform spectrometer encompassing the spectral range of 1.7-17 µm with apodized resolution varying from 0.2 to 1.3 cm −1 . TIRVIM is primarily dedicated to profiling temperature from the surface up to ∼60 km and to monitor aerosol abundance in nadir. TIRVIM also has a limb and solar occultation capability. The technical concept of the instrument, its accommodation on the spacecraft, the optical designs as well as some of the calibrations, and the expected performances for its three channels are described.

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Compact echelle spectrometer for occultation sounding of the Martian atmosphere: design and performance

Cited by 21 publications

References 37 publications

AOTF spectrometers in space missions and their imaging capabilities

AOTF spectrometers in space missions and their imaging capabilities

High resolution middle infrared spectrometer, a part of atmospheric chemistry suite (ACS) for EXOMARS 2016 trace gas orbiter

The Atmospheric Chemistry Suite (ACS) of Three Spectrometers for the ExoMars 2016 Trace Gas Orbiter

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