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4. VenSpec-H spectrometer on the ESA EnVision mission: Design, modeling, analysis

Author

Neefs, E., Vandaele, A.C., De Cock, R., Erwin, J., Robert, S., Thomas, I.R., Berkenbosch, S., Jacobs, L., Bogaert, P., Beeckman, B., Brassine, A., Messios, N., De Donder, E., Bolsée, D., Pereira, N., Tackley, P., Gerya, T., Kögl, S., Kögl, P., Gröbelbauer, H.-P., Wirz, F., Székely, G., Eaton, N., Roibás-Millán, E., Torralbo, I., Rubio-Arnaldo, H., Alvarez, J.M., Navajas Ortega, D., De Vos, L., Sørensen, R., Moelans, W., Algoedt, A., Blau, M., Stam, D., Renotte, E., Klinkenberg, P., Borguet, B., Thomas, S., Vervaeke, M., Thienpont, H., Castro, J.M., and Jimenez, J.

Published
2025
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6. Addendum to “Description, accessibility and usage of SOIR/Venus Express atmospheric profiles of Venus distributed in VESPA (Virtual European Solar and Planetary Access)”

Author

Trompet, L., primary, Geunes, Y., additional, Ooms, T., additional, Mahieux, A., additional, Wilquet, V., additional, Chamberlain, S., additional, Robert, S., additional, Thomas, I.R., additional, Erard, S., additional, Cecconi, B., additional, Le Sidaner, P., additional, and Vandaele, A.C., additional

Published
2024
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7. CASTAway: An asteroid main belt tour and survey

Author

Bowles, N.E., Snodgrass, C., Gibbings, A., Sanchez, J.P., Arnold, J.A., Eccleston, P., Andert, T., Probst, A., Naletto, G., Vandaele, A.C., de Leon, J., Nathues, A., Thomas, I.R., Thomas, N., Jorda, L., Da Deppo, V., Haack, H., Green, S.F., Carry, B., Donaldson Hanna, K.L., Leif Jorgensen, J., Kereszturi, A., DeMeo, F.E., Patel, M.R., Davies, J.K., Clarke, F., Kinch, K., Guilbert-Lepoutre, A., Agarwal, J., Rivkin, A.S., Pravec, P., Fornasier, S., Granvik, M., Jones, R.H., Murdoch, N., Joy, K.H., Pascale, E., Tecza, M., Barnes, J.M., Licandro, J., Greenhagen, B.T., Calcutt, S.B., Marriner, C.M., Warren, T., and Tosh, I.

Published
2018
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9. Observation of the Southern Polar cap during MY34-36 with ExoMars-TGO NOMAD LNO

Author

Ruiz Lozano, L., primary, Oliva, F., additional, Karatekin, Ö., additional, Bellucci, G., additional, Dehant, V., additional, D'Aversa, E., additional, Carrozzo, F.G., additional, Schmidt, F., additional, Cruz Mermy, G., additional, Thomas, I.R., additional, Vandaele, A.C., additional, Daerden, F., additional, Ristic, B., additional, Patel, M.R., additional, and López-Moreno, J.-J., additional

Published
2023
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11. Science objectives and performances of NOMAD, a spectrometer suite for the ExoMars TGO mission

Author

Vandaele, A.C., Neefs, E., Drummond, R., Thomas, I.R., Daerden, F., Lopez-Moreno, J.-J., Rodriguez, J., Patel, M.R., Bellucci, G., Allen, M., Altieri, F., Bolsée, D., Clancy, T., Delanoye, S., Depiesse, C., Cloutis, E., Fedorova, A., Formisano, V., Funke, B., Fussen, D., Geminale, A., Gérard, J.-C., Giuranna, M., Ignatiev, N., Kaminski, J., Karatekin, O., Lefèvre, F., López-Puertas, M., López-Valverde, M., Mahieux, A., McConnell, J., Mumma, M., Neary, L., Renotte, E., Ristic, B., Robert, S., Smith, M., Trokhimovsky, S., Vander Auwera, J., Villanueva, G., Whiteway, J., Wilquet, V., and Wolff, M.

Published
2015
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12. First Observation of the Oxygen 630 nm Emission in the Martian Dayglow

Author

Gérard, J.‐C., Aoki, S., Gkouvelis, L., Soret, L., Willame, Y., Thomas, I.R., Depiesse, C., Ristic, B., Vandaele, A. C., Hubert, B., Daerden, F., Patel, M. R., López‐Moreno, J.‐J., Bellucci, G., Mason, J. P., López‐Valverde, M. A., Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, UK Space Agency, Agenzia Spaziale Italiana, and European Space Agency

Abstract

Following the recent detection of the oxygen green line airglow on Mars, we have improved the statistical analysis of the data recorded by the NOMAD/UVIS instrument on board the ExoMars Trace Gas Orbiter mission by summing up hundreds of spectra to increase the signal-to-noise ratio. This led to the observation of the OI 630 nm emission, the first detection in a planetary atmosphere outside the Earth. The average limb profile shows a broad peak intensity of 4.8 kR near 150 km. Comparison with a photochemical model indicates that it is well predicted by current photochemistry, considering the sources of uncertainty. The red/green line intensity ratio decreases dramatically with altitude as a consequence of the efficient quenching of O(1D) by CO2. Simultaneous observations of the green and red dayglow will provide information on variations in the thermosphere in response to seasonal changes and the effects of solar events. © 2021. American Geophysical Union., B.H. is a research associate and S.A. is a postdoctoral researcher of the Belgian Fund for Scientific Research (FNRS). ExoMars is a space mission of the ESA and Roscosmos. The NOMAD experiment is led by the IASB-BIRA, assisted by Co-PI teams from Spain (IAA-CSIC), Italy (INAF-IAPS), and the United Kingdom (The Open University). This project acknowledges funding from BELSPO, with the financial and contractual coordination by the ESA PRODEX Office (PEA grant numbers 4000103401 and 4000121493). M.A.L.-V. and J.-J.L.-M. were supported by grant number PGC2018-101836-B-100 (MCIU/AEI/FEDER, EU) and by the Spanish Science Ministry Centro de Excelencia Severo Ochoa Program under grant number SEV-2017-0709. M.R.P. and J.P.M were funded by the UK Space Agency under grants ST/V002295/1, ST/V005332/1, ST/S00145X/1, and ST/R005761/1. G.B. thanks the Italian Space Agency through grant number 2018-2-HH.0.

Published
2021

13. NOMAD, an integrated suite of three spectrometers for the ExoMars trace gas mission: Technical description, science objectivs and expected performance

Author

Vandaele, Ann Carine, Lopez-Moreno, J.-J., Patel, M.R., Bellucci, G., Daerden, F., Ristic, B., Robert, Séverine, Thomas, I.R., Wilquet, Valérie, Allen, M., Alonso-Rodrigo, G., Altieri, F., Aoki, S, Bolsée, D., Clancy, T., Cloutis, E., Depiesse, Cédric, Drummond, Rachel, Fedorova, A., Formisano, V., Funke, Bernd, Gonzalez-Galindo, F., Geminale, A., Gérard, J.-C., Giuranna, M., Hetey, L., Ignatiev, N., Kaminski, J., Karatekin, Ozgur, Kasaba, Y., Leese, M., Lefèvre, F., Lewis, S. R., Lopez-Puertas, Manuel, Lopez-Valverde, M.A., Mahieux, Arnaud, Mason, James, McConnell, John, Mumma, M., Neary, L., Neefs, Eddy, Renotte, E., Gómez-Rodriguez, Julio, Sindoni, G., Smith, M., Stiepen, A., Trokhimovsky, A., Vander Auwera, Jean, Villanueva, G., Viscardy, Sébastien, Whiteway, J.A., Willame, Yannick, Wolff, M., and NOMAD, Team

Subjects
Spectroscopie [électromagnétisme, optique, acoustique], Chimie, Physique atomique et moléculaire
Abstract

info:eu-repo/semantics/published

Published
2018

14. CASTAway:An asteroid main belt tour and survey

Author

Bowles, Neil, Snodgrass, C., Gibbings, Alison, Sanchez, J. A., Arnold, J.A., Eccleston, P., Anderton, T., Probst, A., Naletto, G., Vandaele, A.C., de Leon, J., Nathues, A., Thomas, I.R., Thomas, N., Jorda, Lucia, Da Deppo, V., Haack, H., Green, S.F., Carry, B., Donaldson Hanna, K.L., Jørgensen, J. Leif, Kereszturi, A, DeMeo, F.E., Patel, Manesh R, Davies, John K, Clarke, Francis M, Kinch, Kjartan Münster, Guilbert-Lepoutre, A., Agarwal, J., Rivkin, A.S., Pravec, P., Fornasier, S., Granvik, M., Jones, R.H., Murdoch, N., Joy, K.H., Pascale, E., Tecza, M., Barnes, J.M., Tosh, I., Bowles, Neil, Snodgrass, C., Gibbings, Alison, Sanchez, J. A., Arnold, J.A., Eccleston, P., Anderton, T., Probst, A., Naletto, G., Vandaele, A.C., de Leon, J., Nathues, A., Thomas, I.R., Thomas, N., Jorda, Lucia, Da Deppo, V., Haack, H., Green, S.F., Carry, B., Donaldson Hanna, K.L., Jørgensen, J. Leif, Kereszturi, A, DeMeo, F.E., Patel, Manesh R, Davies, John K, Clarke, Francis M, Kinch, Kjartan Münster, Guilbert-Lepoutre, A., Agarwal, J., Rivkin, A.S., Pravec, P., Fornasier, S., Granvik, M., Jones, R.H., Murdoch, N., Joy, K.H., Pascale, E., Tecza, M., Barnes, J.M., and Tosh, I.

Published
2018

17. PDS4 Archive developments for NOMAD/ExoMars TGO

Author

ESA’s Planetary GIS Workshop (5-7 May: ESAC, Madrid, Spain), Trompet, L., Mahieux, Arnaud, Depiesse, Cédric, Daerden, F., Berkenbosch, Sophie, Clairquin, Roland, Neefs, Eddy, Ristic, Bojan, Robert, Séverine, Thomas, I.R., Wilquet, Valérie, Vandaele, Ann Carine, Lopez-Moreno, J.-J., Patel, M.R., Bellucci, G., ESA’s Planetary GIS Workshop (5-7 May: ESAC, Madrid, Spain), Trompet, L., Mahieux, Arnaud, Depiesse, Cédric, Daerden, F., Berkenbosch, Sophie, Clairquin, Roland, Neefs, Eddy, Ristic, Bojan, Robert, Séverine, Thomas, I.R., Wilquet, Valérie, Vandaele, Ann Carine, Lopez-Moreno, J.-J., Patel, M.R., and Bellucci, G.

Abstract

info:eu-repo/semantics/nonPublished

Published
2015

18. Contribution from SOIR/VEX to the updated Venus International Reference Atmosphere (VIRA)

Author

Vandaele, Ann Carine, Chamberlain, S, Mahieux, Arnaud, Ristic, Bojan, Robert, Séverine, Thomas, I.R., Trompet, L., Wilquet, Valérie, Belyaev, Denis, Fedorova, A., Korablev, O., Bertaux, Jean-Loup, Vandaele, Ann Carine, Chamberlain, S, Mahieux, Arnaud, Ristic, Bojan, Robert, Séverine, Thomas, I.R., Trompet, L., Wilquet, Valérie, Belyaev, Denis, Fedorova, A., Korablev, O., and Bertaux, Jean-Loup

Abstract

info:eu-repo/semantics/inPress

Published
2015

19. NOMAD spectrometer on the ExoMars trace gas orbiter mission: part 1—design, manufacturing and testing of the infrared channels

Author

Neefs, Eddy, Vandaele, Ann Carine, Drummond, Rachel, Thomas, I.R., Berkenbosch, Sophie, Clairquin, Roland, Delanoye, S., Ristic, Bojan, Maes, J., Bonnewijn, S., Pieck, G., Neefs, Eddy, Vandaele, Ann Carine, Drummond, Rachel, Thomas, I.R., Berkenbosch, Sophie, Clairquin, Roland, Delanoye, S., Ristic, Bojan, Maes, J., Bonnewijn, S., and Pieck, G.

Abstract

0, info:eu-repo/semantics/published

Published
2015

20. Science objectives and performances of NOMAD, a spectrometer suite for the ExoMars TGO mission

Author

Vandaele, Ann Carine, Neefs, Eddy, Drummond, Rachel, Thomas, I.R., Daerden, F., Lopez-Moreno, J.-J., Rodriguez, J., Patel, M.R., Bellucci, G., Allen, M., Altieri, F., Bolsée, D., Clancy, T., Delanoye, S., Depiesse, Cédric, Cloutis, E., Fedorova, A., Formissano, V., Funke, Bernd, Fussen, Didier, Geminale, A., Gérard, Jean-Claude, Giuranna, M., Ignatiev, N., Kaminski, J., Karatekin, Ozgur, Lefèvre, F., Lopez-Puertas, Manuel, Lopez-Valverde, M.A., Mahieux, Arnaud, McConnell, John, Mumma, M., Neary, L., Renotte, E., Ristic, B., Robert, Séverine, Smith, M, Trokhimovsky, S., Vander Auwera, Jean, Villanueva, G., Whiteway, J.A., Wilquet, Valérie, Wolff, Michel, Vandaele, Ann Carine, Neefs, Eddy, Drummond, Rachel, Thomas, I.R., Daerden, F., Lopez-Moreno, J.-J., Rodriguez, J., Patel, M.R., Bellucci, G., Allen, M., Altieri, F., Bolsée, D., Clancy, T., Delanoye, S., Depiesse, Cédric, Cloutis, E., Fedorova, A., Formissano, V., Funke, Bernd, Fussen, Didier, Geminale, A., Gérard, Jean-Claude, Giuranna, M., Ignatiev, N., Kaminski, J., Karatekin, Ozgur, Lefèvre, F., Lopez-Puertas, Manuel, Lopez-Valverde, M.A., Mahieux, Arnaud, McConnell, John, Mumma, M., Neary, L., Renotte, E., Ristic, B., Robert, Séverine, Smith, M, Trokhimovsky, S., Vander Auwera, Jean, Villanueva, G., Whiteway, J.A., Wilquet, Valérie, and Wolff, Michel

Abstract

The NOMAD spectrometer suite on the ExoMars Trace Gas Orbiter will map the composition and distribution of Mars atmospheric trace species in unprecedented detail, fulfilling many of the scientific objectives of the joint ESA-Roscosmos ExoMars Trace Gas Orbiter mission. The instrument is a combination of three channels, covering a spectral range from the UV to the IR, and can perform solar occultation, nadir and limb observations. In this paper, we present the science objectives of the instrument and how these objectives have influenced the design of the channels. We also discuss the expected performance of the instrument in terms of coverage and detection sensitivity., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2015

21. Composition of the Venus mesosphere: a synthesis of SOIR/VEX observations

Author

The 40th COSPAR Scientific Assembly (Aug. 2-10: Moscou, Russia), Vandaele, Ann Carine, Mahieux, Arnaud, Drummond, Rachel, Robert, Séverine, Thomas, I.R., Wilquet, Valérie, Fedorova, A., Korablev, O., Piccialli, A., Montmessin, Frank, Bertaux, Jean-Loup, The 40th COSPAR Scientific Assembly (Aug. 2-10: Moscou, Russia), Vandaele, Ann Carine, Mahieux, Arnaud, Drummond, Rachel, Robert, Séverine, Thomas, I.R., Wilquet, Valérie, Fedorova, A., Korablev, O., Piccialli, A., Montmessin, Frank, and Bertaux, Jean-Loup

Abstract

info:eu-repo/semantics/nonPublished

Published
2014

22. Venus Terminator Temperature Structure: Venus Express SOIR and VTGCM Comparisons

Author

The 40th COSPAR Scientific Assembly (Aug. 2-10: Moscou, Russia), Vandaele, Ann Carine, Mahieux, Arnaud, Drummond, Rachel, Robert, Séverine, Thomas, I.R., Wilquet, Valérie, Bougher, S., Brecht, A., Schulter, R., The 40th COSPAR Scientific Assembly (Aug. 2-10: Moscou, Russia), Vandaele, Ann Carine, Mahieux, Arnaud, Drummond, Rachel, Robert, Séverine, Thomas, I.R., Wilquet, Valérie, Bougher, S., Brecht, A., and Schulter, R.

Abstract

info:eu-repo/semantics/nonPublished

Published
2014

23. SOIR and NOMAD: Characterization of Planetary Atmospheres

Author

The 13th HITRAN Conference (June 23-25: Boston, USA), Robert, Séverine, Chamberlain, S, Mahieux, Arnaud, Thomas, I.R., Wilquet, Valérie, Vandaele, Ann Carine, The 13th HITRAN Conference (June 23-25: Boston, USA), Robert, Séverine, Chamberlain, S, Mahieux, Arnaud, Thomas, I.R., Wilquet, Valérie, and Vandaele, Ann Carine

Abstract

info:eu-repo/semantics/nonPublished

Published
2014

24. Water, halides and carbon monoxide in the Venus upper atmosphere

Author

EPSC (07-12 Sept: Cascais, Portugal), Chamberlain, S, Wilquet, Valérie, Mahieux, Arnaud, Robert, Séverine, Thomas, I.R., Vandaele, Ann Carine, Bertaux, Jean-Loup, EPSC (07-12 Sept: Cascais, Portugal), Chamberlain, S, Wilquet, Valérie, Mahieux, Arnaud, Robert, Séverine, Thomas, I.R., Vandaele, Ann Carine, and Bertaux, Jean-Loup

Abstract

info:eu-repo/semantics/nonPublished

Published
2014

29. Effectiveness of Fire Safety Components and Systems.

Author

Thomas, I.R

Subjects
*FIRE prevention, *FIRE testing, *FIREPROOFING
Abstract

A concept of fire safety system effectiveness incorporating two elements, efficacy and reliability, is introduced. Historical USA fire data is used to estimate the levels of effectiveness of several fire safety systems in terms of extent of flame spread, the rates of firefighter injuries and civilian fatalities and injuries, and estimated $ loss in fires reported to fire brigades. Based on the data analyzed, sprinklers appear to have greater effectiveness than detectors and protected construction for reducing extent of flame spread and generally (but not always) for reducing the rate of firefighter injuries, civilian fatalities and the estimated $ loss per fire. [ABSTRACT FROM AUTHOR]

Published
2002
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30. CASTAway: An asteroid main belt tour and survey

Author

Bowles, N.E., Snodgrass, C., Gibbings, A., Sanchez, J.P., Arnold, J.A., Eccleston, P., Andert, T., Probst, A., Naletto, G., Vandaele, A.C., De Leon, J., Nathues, A., Thomas, I.R., Thomas, Nicolas, Jorda, L., Da Deppo, V., Haack, H., Green, S.F., Carry, B., Donaldson Hanna, K.L., Leif Jorgensen, J., Kereszturi, A., DeMeo, F.E., Patel, M.R., Davies, J.K., Clarke, F., Kinch, K., Guilbert-Lepoutre, A., Agarwal, J., Rivkin, A.S., Pravec, P., Fornasier, S., Granvik, M., Jones, R.H., Murdoch, N., Joy, K.H., Pascale, E., Tecza, M., Barnes, J.M., Licandro, J., Greenhagen, B.T., Calcutt, S.B., Marriner, C.M., Warren, T., and Tosh, I.

Subjects
13. Climate action, 520 Astronomy, 620 Engineering, 7. Clean energy
Abstract

CASTAway is a mission concept to explore our Solar System’s main asteroid belt. Asteroids and comets provide a window into the formation and evolution of our Solar System and the composition of these objects can be inferred from space-based remote sensing using spectroscopic techniques. Variations in composition across the asteroid populations provide a tracer for the dynamical evolution of the Solar System. The mission combines a long-range (point source) telescopic survey of over 10,000 objects, targeted close encounters with 10–20 asteroids and serendipitous searches to constrain the distribution of smaller (e.g. 10 m) size objects into a single concept. With a carefully targeted trajectory that loops through the asteroid belt, CASTAway would provide a comprehensive survey of the main belt at multiple scales. The scientific payload comprises a 50 cm diameter telescope that includes an integrated low-resolution (R = 30–100) spectrometer and visible context imager, a thermal (e.g. 6–16 μm) imager for use during the flybys, and modified star tracker cameras to detect small (~10 m) asteroids. The CASTAway spacecraft and payload have high levels of technology readiness and are designed to fit within the programmatic and cost caps for a European Space Agency medium class mission, while delivering a significant increase in knowledge of our Solar System.

31. A Global and Seasonal Perspective of Martian Water Vapor from ExoMars/NOMAD

Author

Crismani, M. M. J., Villanueva, G. L., Liuzzi, G., Smith, M. D., Knutsen, E. W., Daerden, F., Neary, L., Mumma, M. J., Aoki, S., Trompet, L., Thomas, I.R., Ristic, B., Bellucci, G., Piccialli, A., Robert, S., Mahieux, A., Lopez Moreno, J‐J, Sindoni, G., Giuranna, M., Patel, M. R, Vandaele, A. C., Crismani, M. M. J., Villanueva, G. L., Liuzzi, G., Smith, M. D., Knutsen, E. W., Daerden, F., Neary, L., Mumma, M. J., Aoki, S., Trompet, L., Thomas, I.R., Ristic, B., Bellucci, G., Piccialli, A., Robert, S., Mahieux, A., Lopez Moreno, J‐J, Sindoni, G., Giuranna, M., Patel, M. R, and Vandaele, A. C.

Abstract

Slightly less than a Martian Year of nominal science (March 2018–January 2020) with the ExoMars Trace Gas Orbiter has furthered the ongoing investigation of dayside water vapor column abundance. These dayside observations span latitudes between 75°S and 75°N, and all longitudes, which can provide global snapshots of the total water column abundances. In addition to tracking the seasonal transport of water vapor between poles, geographic enhancements are noted, particularly in the southern hemisphere, both in Hellas Basin, and in other regions not obviously correlated to topography. We report consistent water vapor climatology with previous spacecraft observations, however, note a difference in total water vapor content is noted. Finally, we are unable to find evidence for substantial diurnal variation in the total dayside water vapor column.

32. First Observation of the Oxygen 630 nm Emission in the Martian Dayglow

Author

Gérard, J.‐C., Aoki, S., Gkouvelis, L., Soret, L., Willame, Y., Thomas, I.R., Depiesse, C., Ristic, B., Vandaele, A. C., Hubert, B., Daerden, F., Patel, M. R., López‐Moreno, J.‐J., Bellucci, G., Mason, J. P., López‐Valverde, M. A., Gérard, J.‐C., Aoki, S., Gkouvelis, L., Soret, L., Willame, Y., Thomas, I.R., Depiesse, C., Ristic, B., Vandaele, A. C., Hubert, B., Daerden, F., Patel, M. R., López‐Moreno, J.‐J., Bellucci, G., Mason, J. P., and López‐Valverde, M. A.

Abstract

Following the recent detection of the oxygen green line airglow on Mars, we have improved the statistical analysis of the data recorded by the NOMAD/UVIS instrument on board the ExoMars Trace Gas Orbiter mission by summing up hundreds of spectra to increase the signal to noise ratio. This led to the observation of the OI 630 nm emission, a first detection in a planetary atmosphere outside the Earth. The average limb profile shows a broad peak intensity of 4.8 kR near 150 km. Comparison with a photochemical model indicates that it is well predicted by current photochemistry, considering the sources of uncertainty. The red/green line intensity ratio decreases dramatically with altitude as a consequence of the efficient quenching of O(1D) by CO2. Simultaneous observations of the green and red dayglow will provide information on variations in the thermosphere in response to seasonal changes and the effects of solar events.

33. Explanation for the increase in high altitude water on Mars observed by NOMAD during the 2018 global dust storm

Author

Neary, L., Daerden, F., Aoki, S., Whiteway, J., Clancy, R.T., Smith, M., Viscardy, S., Erwin, J.T., Thomas, I.R., Villanueva, G., Liuzzi, G., Crismani, M., Wolff, M., Lewis, S.R., Holmes, J.A., Patel, M.R., Giuranna, M., Depiesse, C., Piccialli, A., Robert, S., Trompet, L., Willame, Y., Ristic, B., Vandaele, A.C., Neary, L., Daerden, F., Aoki, S., Whiteway, J., Clancy, R.T., Smith, M., Viscardy, S., Erwin, J.T., Thomas, I.R., Villanueva, G., Liuzzi, G., Crismani, M., Wolff, M., Lewis, S.R., Holmes, J.A., Patel, M.R., Giuranna, M., Depiesse, C., Piccialli, A., Robert, S., Trompet, L., Willame, Y., Ristic, B., and Vandaele, A.C.

Abstract

The Nadir and Occultation for MArs Discovery (NOMAD) instrument on board ExoMars Trace Gas Orbiter (TGO) measured a large increase in water vapor at altitudes in the range of 40‐100 km during the 2018 global dust storm on Mars. Using a three‐dimensional general circulation model, we examine the mechanism responsible for the enhancement of water vapor in the upper atmosphere. Experiments with different prescribed vertical profiles of dust show that when more dust is present higher in the atmosphere the temperature increases and the amount of water ascending over the tropics is not limited by saturation until reaching heights of 70‐100 km. The warmer temperatures allow more water to ascend to the mesosphere. Photochemical simulations show a strong increase in high‐altitude atomic hydrogen following the high‐altitude water vapor increase by a few days.

34. CASTAway: An asteroid main belt tour and survey

Author

Bowles, N.E., Snodgrass, C., Gibbings, A., Sanchez, J.P., Arnold, J.A., Eccleston, P., Andert, T., Probst, A., Naletto, G., Vandaele, A.C., de Leon, J., Nathues, A., Thomas, I.R., Thomas, N., Jorda, L., Da Deppo, V., Haack, H., Green, S.F., Carry, B., Donaldson Hanna, K.L., Leif Jorgensen, J., Kereszturi, A., DeMeo, F.E., Patel, M.R., Davies, J.K., Clarke, F., Kinch, K., Guilbert-Lepoutre, A., Agarwal, J., Rivkin, A.S., Pravec, P., Fornasier, S., Granvik, M., Jones, R.H., Murdoch, N., Joy, K.H., Pascale, E., Tecza, M., Barnes, J.M., Licandro, J., Greenhagen, B.T., Calcutt, S.B., Marriner, C.M., Warren, T., Tosh, I., Bowles, N.E., Snodgrass, C., Gibbings, A., Sanchez, J.P., Arnold, J.A., Eccleston, P., Andert, T., Probst, A., Naletto, G., Vandaele, A.C., de Leon, J., Nathues, A., Thomas, I.R., Thomas, N., Jorda, L., Da Deppo, V., Haack, H., Green, S.F., Carry, B., Donaldson Hanna, K.L., Leif Jorgensen, J., Kereszturi, A., DeMeo, F.E., Patel, M.R., Davies, J.K., Clarke, F., Kinch, K., Guilbert-Lepoutre, A., Agarwal, J., Rivkin, A.S., Pravec, P., Fornasier, S., Granvik, M., Jones, R.H., Murdoch, N., Joy, K.H., Pascale, E., Tecza, M., Barnes, J.M., Licandro, J., Greenhagen, B.T., Calcutt, S.B., Marriner, C.M., Warren, T., and Tosh, I.

Abstract

CASTAway is a mission concept to explore our Solar System’s main asteroid belt. Asteroids and comets provide a window into the formation and evolution of our Solar System and the composition of these objects can be inferred from space-based remote sensing using spectroscopic techniques. Variations in composition across the asteroid populations provide a tracer for the dynamical evolution of the Solar System. The mission combines a long-range (point source) telescopic survey of over 10,000 objects, targeted close encounters with 10–20 asteroids and serendipitous searches to constrain the distribution of smaller (e.g. 10 m) size objects into a single concept. With a carefully targeted trajectory that loops through the asteroid belt, CASTAway would provide a comprehensive survey of the main belt at multiple scales. The scientific payload comprises a 50 cm diameter telescope that includes an integrated low-resolution (R = 30–100) spectrometer and visible context imager, a thermal (e.g. 6–16 µm) imager for use during the flybys, and modified star tracker cameras to detect small (∼10 m) asteroids. The CASTAway spacecraft and payload have high levels of technology readiness and are designed to fit within the programmatic and cost caps for a European Space Agency medium class mission, while delivering a significant increase in knowledge of our Solar System.

35. CASTAway: An asteroid main belt tour and survey

Author

Bowles, N.E., Snodgrass, C., Gibbings, A., Sanchez, J.P., Arnold, J.A., Eccleston, P., Andert, T., Probst, A., Naletto, G., Vandaele, A.C., de Leon, J., Nathues, A., Thomas, I.R., Thomas, N., Jorda, L., Da Deppo, V., Haack, H., Green, S.F., Carry, B., Donaldson Hanna, K.L., Leif Jorgensen, J., Kereszturi, A., DeMeo, F.E., Patel, M.R., Davies, J.K., Clarke, F., Kinch, K., Guilbert-Lepoutre, A., Agarwal, J., Rivkin, A.S., Pravec, P., Fornasier, S., Granvik, M., Jones, R.H., Murdoch, N., Joy, K.H., Pascale, E., Tecza, M., Barnes, J.M., Licandro, J., Greenhagen, B.T., Calcutt, S.B., Marriner, C.M., Warren, T., Tosh, I., Bowles, N.E., Snodgrass, C., Gibbings, A., Sanchez, J.P., Arnold, J.A., Eccleston, P., Andert, T., Probst, A., Naletto, G., Vandaele, A.C., de Leon, J., Nathues, A., Thomas, I.R., Thomas, N., Jorda, L., Da Deppo, V., Haack, H., Green, S.F., Carry, B., Donaldson Hanna, K.L., Leif Jorgensen, J., Kereszturi, A., DeMeo, F.E., Patel, M.R., Davies, J.K., Clarke, F., Kinch, K., Guilbert-Lepoutre, A., Agarwal, J., Rivkin, A.S., Pravec, P., Fornasier, S., Granvik, M., Jones, R.H., Murdoch, N., Joy, K.H., Pascale, E., Tecza, M., Barnes, J.M., Licandro, J., Greenhagen, B.T., Calcutt, S.B., Marriner, C.M., Warren, T., and Tosh, I.

Abstract

CASTAway is a mission concept to explore our Solar System’s main asteroid belt. Asteroids and comets provide a window into the formation and evolution of our Solar System and the composition of these objects can be inferred from space-based remote sensing using spectroscopic techniques. Variations in composition across the asteroid populations provide a tracer for the dynamical evolution of the Solar System. The mission combines a long-range (point source) telescopic survey of over 10,000 objects, targeted close encounters with 10–20 asteroids and serendipitous searches to constrain the distribution of smaller (e.g. 10 m) size objects into a single concept. With a carefully targeted trajectory that loops through the asteroid belt, CASTAway would provide a comprehensive survey of the main belt at multiple scales. The scientific payload comprises a 50 cm diameter telescope that includes an integrated low-resolution (R = 30–100) spectrometer and visible context imager, a thermal (e.g. 6–16 µm) imager for use during the flybys, and modified star tracker cameras to detect small (∼10 m) asteroids. The CASTAway spacecraft and payload have high levels of technology readiness and are designed to fit within the programmatic and cost caps for a European Space Agency medium class mission, while delivering a significant increase in knowledge of our Solar System.

36. First Observation of the Oxygen 630 nm Emission in the Martian Dayglow

Author

Gérard, J.‐C., Aoki, S., Gkouvelis, L., Soret, L., Willame, Y., Thomas, I.R., Depiesse, C., Ristic, B., Vandaele, A. C., Hubert, B., Daerden, F., Patel, M. R., López‐Moreno, J.‐J., Bellucci, G., Mason, J. P., López‐Valverde, M. A., Gérard, J.‐C., Aoki, S., Gkouvelis, L., Soret, L., Willame, Y., Thomas, I.R., Depiesse, C., Ristic, B., Vandaele, A. C., Hubert, B., Daerden, F., Patel, M. R., López‐Moreno, J.‐J., Bellucci, G., Mason, J. P., and López‐Valverde, M. A.

Abstract

Following the recent detection of the oxygen green line airglow on Mars, we have improved the statistical analysis of the data recorded by the NOMAD/UVIS instrument on board the ExoMars Trace Gas Orbiter mission by summing up hundreds of spectra to increase the signal to noise ratio. This led to the observation of the OI 630 nm emission, a first detection in a planetary atmosphere outside the Earth. The average limb profile shows a broad peak intensity of 4.8 kR near 150 km. Comparison with a photochemical model indicates that it is well predicted by current photochemistry, considering the sources of uncertainty. The red/green line intensity ratio decreases dramatically with altitude as a consequence of the efficient quenching of O(1D) by CO2. Simultaneous observations of the green and red dayglow will provide information on variations in the thermosphere in response to seasonal changes and the effects of solar events.

37. Explanation for the increase in high altitude water on Mars observed by NOMAD during the 2018 global dust storm

Author

Neary, L., Daerden, F., Aoki, S., Whiteway, J., Clancy, R.T., Smith, M., Viscardy, S., Erwin, J.T., Thomas, I.R., Villanueva, G., Liuzzi, G., Crismani, M., Wolff, M., Lewis, S.R., Holmes, J.A., Patel, M.R., Giuranna, M., Depiesse, C., Piccialli, A., Robert, S., Trompet, L., Willame, Y., Ristic, B., Vandaele, A.C., Neary, L., Daerden, F., Aoki, S., Whiteway, J., Clancy, R.T., Smith, M., Viscardy, S., Erwin, J.T., Thomas, I.R., Villanueva, G., Liuzzi, G., Crismani, M., Wolff, M., Lewis, S.R., Holmes, J.A., Patel, M.R., Giuranna, M., Depiesse, C., Piccialli, A., Robert, S., Trompet, L., Willame, Y., Ristic, B., and Vandaele, A.C.

Abstract

The Nadir and Occultation for MArs Discovery (NOMAD) instrument on board ExoMars Trace Gas Orbiter (TGO) measured a large increase in water vapor at altitudes in the range of 40‐100 km during the 2018 global dust storm on Mars. Using a three‐dimensional general circulation model, we examine the mechanism responsible for the enhancement of water vapor in the upper atmosphere. Experiments with different prescribed vertical profiles of dust show that when more dust is present higher in the atmosphere the temperature increases and the amount of water ascending over the tropics is not limited by saturation until reaching heights of 70‐100 km. The warmer temperatures allow more water to ascend to the mesosphere. Photochemical simulations show a strong increase in high‐altitude atomic hydrogen following the high‐altitude water vapor increase by a few days.

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