Atmospheric Chemistry Suite

Atmospheric Chemistry SuiteOperator| European Space Agency

|

Manufacturer| Russia & France
Instrument type| Fourier infrared spectrometer
Function| Atmospheric chemical analysis
Mission duration| 7 years (planned)
Began operations| 19 October 2016
Properties
Spectral band| Infrared
Host spacecraft
Spacecraft| ExoMars Trace Gas Orbiter
Operator| Roscosmos
Launch date| 14 March 2016, 09:31 (2016-03-14UTC09:31) UTC
Rocket| Proton-M/Briz-M
Launch site| Baikonur 200/39
COSPAR ID| 2016-017A
Orbit| Mars

The Atmospheric Chemistry Suite (ACS) is a science payload consisting of three infrared spectrometer channels aboard the ExoMars Trace Gas Orbiter (TGO) orbiting Mars since October 2016.[1] The three channels are: the near-infrared channel (NIR), the mid-infrared channel (MIR), and the far infrared channel (FIR, also called TIRVIM).

The ACS was proposed in 2011 by Russian Academy Section and eventually accepted by the European Space Agency (ESA) and Roscosmos as one of two Russian instruments onboard TGO.[2] The instrument was funded by Roscosmos and Centre national d'études spatiales (CNES) of France, and has components of both Russia and France. Its development and fabrication was under Russian leadership. The functionality of all the three channels was confirmed during cruise to Mars.

## Contents

* 1 Objectives
* 2 Channels
* 3 Methane
* 4 References

## Objectives

The main objective of the ACS suite is to make an inventory and map minor atmospheric species or trace gases in the atmosphere of Mars. This will allow scientists to profile the upper limits on the methane contents, and to possibly to detect sulfur dioxide (SO2), a gas of volcanic origin.[2]

## Channels

The near-infrared channel (NIR), is a compact spectrometer operating in the range of 0.7–1.7 μm with a resolving power of λ/Δλ ~ 20,000 and with a spectral range of 10–20 nm. It is designed to operate in nadir and in solar occultation modes.[2]

The mid-infrared channel (MIR) is an echelle spectrometer with crossed dispersion, designed exclusively for solar occultation measurements in the 2.2–4.4 μm spectral range with a resolving power of approximately 50,000.[2]

The far-infrared channel covers the thermal infrared spectroscopy; it is a Fourier spectrometer called the TIRVIM. It has an aperture of ~5 cm and it measures the spectrum of 1.7–17 μm. Its main task will be for temperature sounding of the Martian atmosphere in the 15-μm CO2 band. TIRVIM has 10 times higher performances than the PFS spectrometer of Mars Express orbiter.[2]

Channel designation  | Abbreviation  | Wavelength | Trace gas detected[2]

|
|
|

Near-Infrared  | NIR  | 0.7–1.7 µm  | H2O, O2, CO2, O−2 , OH−, and NO−
Mid-Infrared  | MIR  | 2.2–4.4 µm  | CH4, H2O, HO2, HDO, HF, HCl, CO, SO2, CO2 and their isotopes, etc.
Far-Infrared
(Thermal-Infrared)  | FIR or TIRVIM  | 1.7–17 µm  | Temperature profiles, CO2, H2O2, dust, water ice.

## Methane

Of particular interest to this astrobiology mission, is the detection and characterization of the atmospheric methane (CH4), as it may be of geological or biological nature. Large differences in the abundances were measured between observations taken in 2003, 2006, and in 2014 NASA reported that the Curiosity rover detected a tenfold increase ('spike') in methane in the atmosphere in late 2013 and early 2014. This suggests that the methane was locally concentrated and is probably seasonal. Because methane on Mars would quickly break down due to ultraviolet radiation from the Sun and chemical reactions with other gases, its persistent presence in the atmosphere also implies the existence of an unknown source to continually replenish the gas.[3]

Measuring the ratio of hydrogen and methane levels on Mars may help determine the likelihood of life on Mars.[4][5] According to the scientists, "...low H2/CH4 ratios (less than approximately 40) indicate that life is likely present and active."[4]

## References

1. ↑ Three infrared spectrometers, an atmospheric chemistry suite for the ExoMars 2016 Trace Gas Orbiter. Korablev, O., et al., 2014. J. Appl. Remote Sensing. 8, 4983.
2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Science Investigations for the Atmospheric Chemistry Suite on ExoMars TGO. (PDF) O. Korablev, N. I. Ignatiev, A. A. Fedorova, A. Yu. Trokhimovskiy, A. V. Grigoriev, A. V. Shakun, Space, F. Montmessin, F. Lefevre, F. Forget. Sixth International Workshop on the Mars Atmosphere: Modelling and Observations. Granada, Spain 17–20 January 2017.
3. ↑ Webster, Christopher R. (23 January 2015). "Mars methane detection and variability at Gale crater". Science 347 (6220): 415–417. doi:10.1126/science.1261713. PMID 25515120. Bibcode: 2015Sci...347..415W. https://authors.library.caltech.edu/52526/7/Webster.SM.pdf.
4. ↑ 4.0 4.1 Oze, Christopher; Jones, Camille; Goldsmith, Jonas I.; Rosenbauer, Robert J. (7 June 2012). "Differentiating biotic from abiotic methane genesis in hydrothermally active planetary surfaces". PNAS 109 (25): 9750–9754. doi:10.1073/pnas.1205223109. PMID 22679287. Bibcode: 2012PNAS..109.9750O.
5. ↑ Staff (25 June 2012). "Mars Life Could Leave Traces in Red Planet's Air: Study". Space.com. http://www.space.com/16284-mars-life-atmosphere-hydrogen-methane.html.

* v
* t
* e

Mars

Outline of Mars

Geography|

| Atmosphere|

* Circulation
* Climate
* Dust devil tracks
* Methane

|

Regions|

* Arabia Terra
* Cerberus (Mars)
* Cydonia
* Eridania Lake
* Iani Chaos
* Olympia Undae
* Planum Australe
* Planum Boreum
* Quadrangles
* Sinus Meridiani
* Tempe Terra
* Terra Cimmeria
* Terra Sabaea
* Tharsis
* Undae
* Ultimi Scopuli
* Vastitas Borealis

Physical
features|

* "Canals" (list)
* Canyons
* Catenae
* Chaos terrain
* Craters
* Fossae
* Gullies
* Mensae
* Labyrinthi
* Mountains
* by height
* Observed rocks
* Outflow channels
* Plains
* Valley network
* Valleys
* Gravity

Geology|

* Brain terrain
* Carbonates
* Chaos terrain
* Color
* Composition
* Concentric crater fill
* Dark slope streak
* Dichotomy
* Fretted terrain
* Geysers
* Glaciers
* Groundwater
* Gullies
* Lakes
* Lava tubes
* Lobate debris apron
* Marsquake
* Meteorites
* on Earth
* on Mars
* Mud cracks
* North Polar Basin
* Ocean hypothesis
* Ore resources
* Polar caps
* Recurring slope lineae (RSL)
* Ring mold craters
* Rootless cones
* Seasonal flows
* Soil
* Spherules
* Surface
* "Swiss cheese" feature
* Terrain softening
* Tharsis bulge
* Volcanology
* Water
* Yardangs

History|

* Amazonian
* Hesperian
* Noachian
* Observation history
* Classical albedo features

Astronomy|

| Moons|

* Phobos
* Stickney crater
* Monolith
* Deimos
* Swift crater
* Voltaire crater

|

Transits|

* Solar eclipses on Mars
* Satellite transits
* Phobos
* Deimos
* Planetary transits
* Earth
* Mercury

Asteroids|

* Mars-crossers
* 2007 WD5
* Trojans
* 5261 Eureka
* 1998 VF31
* 1999 UJ7
* 2007 NS2

Comets|

* C/2013 A1 (Siding Spring) (Mars close approach, 19 Oct 2014)

Exploration|

| Concepts|

* Flyby
* Orbiter
* Landing
* Rover
* Sample return
* Human mission
* Permanent settlement
* Colonization
* Terraforming

|

Missions|

* List of missions to Mars

Advocacy|

* The Mars Project
* The Case for Mars
* Inspiration Mars Foundation
* Mars Institute
* Mars Society
* Mars race

Related|

* Artificial objects on Mars
* Memorials on Mars
* Fiction
* List of films set on Mars
* Martian
* Martian scientist
* Mythology
* Phobos and Deimos in fiction
* Flag of Mars
* Life on Mars
* Sub-Earth
* Timekeeping on Mars
* Darian calendar

* Book
* Category

* v
* t
* e

ExoMars programme

ExoMars 2016|

| Spacecraft|

* Schiaparelli
* Trace Gas Orbiter

|

Instruments|

* ACS
* Electra
* FREND
* NOMAD

ExoMars 2020|

| Spacecraft|

* Kazachok
* Rosalind Franklin

|

Instruments|

* ADRON-RM
* CLUPI
* HABIT
* ISEM
* LaRa
* MA-MISS
* MicrOmega-IR
* MOMA
* PanCam
* RLS
* WISDOM

Related|

* MAX-C rover
* Meridiani Planum
* Oxia Planum

* Category
* Commons

* v
* t
* e

Astrobiology

Disciplines|

* Astrochemistry
* Astrophysics
* Atmospheric sciences
* Biochemistry
* Evolutionary biology
* Exoplanetology
* Geomicrobiology
* Microbiology
* Paleontology
* Planetary science

Main topics|

* Abiogenesis
* Allan Hills 84001
* Biomolecule
* Biosignature
* Drake equation
* Earliest known life forms
* Earth analog
* Extraterrestrial life
* Extraterrestrial sample curation
* Extremophiles
* Hypothetical types of biochemistry
* List of microorganisms tested in outer space
* Molecules detected in outer space
* Ocean planet
* Origin of life
* Panspermia
* Planetary protection
* Search for extraterrestrial intelligence (SETI)
* Yamato meteorite

Planetary
habitability|

* Habitability of binary star systems
* Habitability of K-type main-sequence star systems
* Habitability of natural satellites
* Habitability of red dwarf systems
* Circumstellar habitable zone
* Earth analog
* List of potentially habitable exoplanets
* Tholin
* Extraterrestrial liquid water
* Galactic habitable zone
* Superhabitable planet

Space
missions|

| Earth orbit|

* BIO
* BIOCORE
* Biolab
* Bion
* BIOPAN
* Biosatellite program
* E-MIST
* ERA
* CROPIS
* EXOSTACK
* EXPOSE
* Lunar Micro Ecosystem
* O/OREOS
* OREOcube
* Tanpopo
* VEGGIE

|

Mars|

* Beagle 2
* ExoMars Trace Gas Orbiter
* Fobos-Grunt
* Mars Science Laboratory
* Curiosity
* Phoenix
* Viking

Comets and
asteroids|

* Hayabusa2
* OSIRIS-REx
* Rosetta

Planned|

* BioSentinel
* Dragonfly
* Europa Clipper
* ExoMars
* Rosalind Franklin rover
* Kazachock lander
* Mars 2020 rover
* HX-1

Proposed|

* CAESAR
* Enceladus Explorer
* Enceladus Life Finder‎
* Enceladus Life Signatures and Habitability
* Europa Lander
* ExoLance
* Explorer of Enceladus and Titan
* Icebreaker Life
* Journey to Enceladus and Titan
* Laplace-P
* Life Investigation For Enceladus
* Mars sample return mission
* Oceanus
* THEO
* Trident

Cancelled and
undeveloped|

* Astrobiology Field Laboratory
* Beagle 3
* Biological Oxidant and Life Detection
* Living Interplanetary Flight Experiment
* Mars Astrobiology Explorer-Cacher
* MELOS
* Northern Light
* Red Dragon
* Terrestrial Planet Finder

Institutions
and programs|

* Astrobiology Society of Britain
* Astrobiology Science and Technology for Exploring Planets
* Breakthrough Initiatives
* Breakthrough Listen
* Breakthrough Message
* Breakthrough Starshot
* Carl Sagan Institute
* Center for Life Detection Science
* European Astrobiology Network Association
* NASA Astrobiology Institute
* Nexus for Exoplanet System Science
* Ocean Worlds Exploration Program
* Spanish Astrobiology Center‎

* Category
* Commons
* Portal: Astronomy
* Biology

* v
* t
* e

Science instruments on satellites and spacecraft

Radar|

* Cassini–Huygens
* Magellan
* Paz
* Pioneer Venus Orbiter
* REASON
* SELENE
* SHARAD
* MARSIS
* Venera 4
* 8
* 9
* 10
* 15
* 16
* WISDOM

Radio science|

* Akatsuki
* Cassini–Huygens
* Europa-UVS
* ExoMars lander
* Galileo
* InSight
* Kaguya
* Magellan
* Mariner 2
* 3
* 4
* 5
* 6, 7
* 9
* 10
* Mars Express
* MESSENGER
* Nozomi
* Pioneer 7
* 10
* 11
* Pioneer Venus Orbiter
* Sakigake
* Venus Express
* Venera 9
* Voyager 1
* 2

Radiometer|

| Microwave|

| Near Earth|

* AQUA
* AMR-C (Sentinel-6)
* AMSR-E (AQUA)
* AMSR (ADEOS II)
* AMSR2 (Shizuku)
* DMSP 5D-2/F13-F15
* DMSP 5D-2/F16
* ERSS
* Envisat
* GPM Core
* Kanopus-ST
* MIRAS
* MISR, MOPITT (Terra)
* MSR (MOS-1, MOS-1b)
* MTVZA (Meteor-3M-1)
* MTVZA-GYa
* Meteor-M2
* Meteor-M2-1
* Nimbus 7
* RM-08 and MTVZA-OK (Sich-1M)
* Seasat
* Sentinel-3
* SMAP
* SMMR
* SMOS
* SSM/I
* SSMIS
* TRMM
* WSF-M
* Zond-PP

|

Interplanetary|

* Cassini-Huygens
* Electra (radio)
* Mariner 2
* MWR (Juno)
* Rosetta

Infrared-Visible|

| Near Earth|

* AVHRR
* ASTER, MISR (Terra)
* AIRS
* AVNIR
* AVNIR-2
* CERES (TRMM, Terra, Aura, Suomi NPP, NOAA-20)
* ERBS
* ERSS
* GLI (ADEOS II)
* Kanopus-V-IK
* MESSR and VTIR
* MOS-1
* 1b
* Meteor-2
* MODIS (Terra, Aqua)
* OPS (JERS-1)
* ORI (EURECA)
* Radiation Budget Instrument
* SGLI (GCOM-C)
* SLSTR (Sentinel-3)
* VIIRS (Suomi NPP, JPSS-2)

|

Interplanetary|

* COMARS+ (on Schiaparelli)
* Diviner (on LRO)
* HP3 (on InSight)

* IRIS
* Luna 13
* Mariner 6 and 7
* Mariner 10
* Mars 96
* 2M No.521
* 2M No.522
* Pioneer 10
* 11
* PMIRR (on Mars Climate Orbiter)
* Venera 9
* 10
* Voyager 1
* 2

Ultraviolet (UV)|

| Near Earth|

* ORI (EURECA)
* LYRA
* Proba-2

|

Spectrophotometers|

| Long wavelength|

| Interplanetary|

* ISO

|

Visible-IR (VIRS)|

| Near Earth|

* CASE
* MOMS
* Multispectral Scanner
* SCIAMACHY
* TES
* TRMM

|

Interplanetary|

* AKARI
* Envisat
* Rosalind Franklin rover
* MA-MISS
* ISEM
* Infrared Space Observatory
* IRIS (Voyager 1 and 2)
* JIRAM (on Juno)
* M3
* Mariner 6 and 7
* MASCS
* MERIS
* E-THEMIS, MISE, SUDA (on Europa Clipper)
* Ralph
* SPICAM
* SPICAV

UV-visible (UVVS)|

| Interplanetary|

* Alice
* Mariner 6 and 7
* Mariner 10
* MASCS
* NOMAD
* SPICAM
* SPICAV
* UVS
* Voyager 1
* 2

|

Raman|

| Interplanetary|

* Raman Laser Spectrometer (Rosalind Franklin rover)
* SHERLOC (Mars 2020 rover)

|

Magnetometer|

| Near Earth|

* GOES
* QuakeSat 1 and 2
* SGVM
* Proba-2

|

Interplanetary|

* FIELDS
* Pioneer 10
* 11
* Voyager 1
* 2
* MAG (Juno)
* ICEMAG and PIMS (Europa Clipper)

Triaxial fluxgate|

| Interplanetary|

* Cassini–Huygens
* FIELDS
* Magsat
* Mariner 2
* 4
* 5
* 10
* MESSENGER
* Pioneer 11
* Venus Express

|

Helium vapor|

| Interplanetary|

* Cassini–Huygens

|

Particle
detectors|

| Ion detectors|

| Near Earth|

* DEMETER
* TPMU and DSLP
* Proba-2

|

Interplanetary|

* ASPERA-3
* ASPERA-4
* Mariner 2
* SPS
* Ulysses

Neutral particle detector|

| Interplanetary|

* ADRON-RM (Rosalind Franklin rover)
* ASPERA-3 (on Mars Express)
* ASPERA-4 (on Venus Express)
* DAN (on Curiosity)
* FREND (on ExoMars TGO)
* Nozomi
* SPS (on Mariner 2)
* Ulysses

|

Mass spectrometer|

| Interplanetary|

* MASPEX (Europa Clipper)
* MOMA (Rosalind Franklin rover)

|

Seismometers|

* SEIS (on InSight)
* Viking 1
* 2

Imagers/telescopes|

* High Resolution Stereo Camera
* HiRISE
* LORRI
* Mars Orbiter Camera

Microscopes|

* MicrOmega-IR (Rosalind Franklin rover)

Astronomical
instruments|

* International Lunar Observatory
* MoonLIGHT

Misc|

* Deep Space Atomic Clock
* Inertial Stellar Compass
* Venetia Burney Student Dust Counter
* Plasma Wave Subsystem

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