Search Results - (Author, Cooperation:S. K. Atreya)
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1P. R. Mahaffy ; C. R. Webster ; S. K. Atreya ; H. Franz ; M. Wong ; P. G. Conrad ; D. Harpold ; J. J. Jones ; L. A. Leshin ; H. Manning ; T. Owen ; R. O. Pepin ; S. Squyres ; M. Trainer
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-07-23Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
2C. R. Webster ; P. R. Mahaffy ; G. J. Flesch ; P. B. Niles ; J. H. Jones ; L. A. Leshin ; S. K. Atreya ; J. C. Stern ; L. E. Christensen ; T. Owen ; H. Franz ; R. O. Pepin ; A. Steele ; C. Achilles ; C. Agard ; J. A. Alves Verdasca ; R. Anderson ; D. Archer ; C. Armiens-Aparicio ; R. Arvidson ; E. Atlaskin ; A. Aubrey ; B. Baker ; M. Baker ; T. Balic-Zunic ; D. Baratoux ; J. Baroukh ; B. Barraclough ; K. Bean ; L. Beegle ; A. Behar ; J. Bell ; S. Bender ; M. Benna ; J. Bentz ; G. Berger ; J. Berger ; D. Berman ; D. Bish ; D. F. Blake ; J. J. Blanco Avalos ; D. Blaney ; J. Blank ; H. Blau ; L. Bleacher ; E. Boehm ; O. Botta ; S. Bottcher ; T. Boucher ; H. Bower ; N. Boyd ; B. Boynton ; E. Breves ; J. Bridges ; N. Bridges ; W. Brinckerhoff ; D. Brinza ; T. Bristow ; C. Brunet ; A. Brunner ; W. Brunner ; A. Buch ; M. Bullock ; S. Burmeister ; M. Cabane ; F. Calef ; J. Cameron ; J. Campbell ; B. Cantor ; M. Caplinger ; J. Caride Rodriguez ; M. Carmosino ; I. Carrasco Blazquez ; A. Charpentier ; S. Chipera ; D. Choi ; B. Clark ; S. Clegg ; T. Cleghorn ; E. Cloutis ; G. Cody ; P. Coll ; P. Conrad ; D. Coscia ; A. Cousin ; D. Cremers ; J. Crisp ; A. Cros ; F. Cucinotta ; C. d'Uston ; S. Davis ; M. Day ; M. de la Torre Juarez ; L. DeFlores ; D. DeLapp ; J. DeMarines ; D. DesMarais ; W. Dietrich ; R. Dingler ; C. Donny ; B. Downs ; D. Drake ; G. Dromart ; A. Dupont ; B. Duston ; J. Dworkin ; M. D. Dyar ; L. Edgar ; K. Edgett ; C. Edwards ; L. Edwards ; B. Ehlmann ; B. Ehresmann ; J. Eigenbrode ; B. Elliott ; H. Elliott ; R. Ewing ; C. Fabre ; A. Fairen ; K. Farley ; J. Farmer ; C. Fassett ; L. Favot ; D. Fay ; F. Fedosov ; J. Feldman ; S. Feldman ; M. Fisk ; M. Fitzgibbon ; M. Floyd ; L. Fluckiger ; O. Forni ; A. Fraeman ; R. Francis ; P. Francois ; C. Freissinet ; K. L. French ; J. Frydenvang ; A. Gaboriaud ; M. Gailhanou ; J. Garvin ; O. Gasnault ; C. Geffroy ; R. Gellert ; M. Genzer ; D. Glavin ; A. Godber ; F. Goesmann ; W. Goetz ; D. Golovin ; F. Gomez Gomez ; J. Gomez-Elvira ; B. Gondet ; S. Gordon ; S. Gorevan ; J. Grant ; J. Griffes ; D. Grinspoon ; J. Grotzinger ; P. Guillemot ; J. Guo ; S. Gupta ; S. Guzewich ; R. Haberle ; D. Halleaux ; B. Hallet ; V. Hamilton ; C. Hardgrove ; D. Harker ; D. Harpold ; A. M. Harri ; K. Harshman ; D. Hassler ; H. Haukka ; A. Hayes ; K. Herkenhoff ; P. Herrera ; S. Hettrich ; E. Heydari ; V. Hipkin ; T. Hoehler ; J. Hollingsworth ; J. Hudgins ; W. Huntress ; J. Hurowitz ; S. Hviid ; K. Iagnemma ; S. Indyk ; G. Israel ; R. Jackson ; S. Jacob ; B. Jakosky ; E. Jensen ; J. K. Jensen ; J. Johnson ; M. Johnson ; S. Johnstone ; A. Jones ; J. Joseph ; I. Jun ; L. Kah ; H. Kahanpaa ; M. Kahre ; N. Karpushkina ; W. Kasprzak ; J. Kauhanen ; L. Keely ; O. Kemppinen ; D. Keymeulen ; M. H. Kim ; K. Kinch ; P. King ; L. Kirkland ; G. Kocurek ; A. Koefoed ; J. Kohler ; O. Kortmann ; A. Kozyrev ; J. Krezoski ; D. Krysak ; R. Kuzmin ; J. L. Lacour ; V. Lafaille ; Y. Langevin ; N. Lanza ; J. Lasue ; S. Le Mouelic ; E. M. Lee ; Q. M. Lee ; D. Lees ; M. Lefavor ; M. Lemmon ; A. Lepinette Malvitte ; R. Leveille ; E. Lewin-Carpintier ; K. Lewis ; S. Li ; L. Lipkaman ; C. Little ; M. Litvak ; E. Lorigny ; G. Lugmair ; A. Lundberg ; E. Lyness ; M. Madsen ; J. Maki ; A. Malakhov ; C. Malespin ; M. Malin ; N. Mangold ; G. Manhes ; H. Manning ; G. Marchand ; M. Marin Jimenez ; C. Martin Garcia ; D. Martin ; M. Martin ; J. Martinez-Frias ; J. Martin-Soler ; F. J. Martin-Torres ; P. Mauchien ; S. Maurice ; A. McAdam ; E. McCartney ; T. McConnochie ; E. McCullough ; I. McEwan ; C. McKay ; S. McLennan ; S. McNair ; N. Melikechi ; P. Y. Meslin ; M. Meyer ; A. Mezzacappa ; H. Miller ; K. Miller ; R. Milliken ; D. Ming ; M. Minitti ; M. Mischna ; I. Mitrofanov ; J. Moersch ; M. Mokrousov ; A. Molina Jurado ; J. Moores ; L. Mora-Sotomayor ; J. M. Morookian ; R. Morris ; S. Morrison ; R. Mueller-Mellin ; J. P. Muller ; G. Munoz Caro ; M. Nachon ; S. Navarro Lopez ; R. Navarro-Gonzalez ; K. Nealson ; A. Nefian ; T. Nelson ; M. Newcombe ; C. Newman ; H. Newsom ; S. Nikiforov ; B. Nixon ; E. Noe Dobrea ; T. Nolan ; D. Oehler ; A. Ollila ; T. Olson ; M. A. de Pablo Hernandez ; A. Paillet ; E. Pallier ; M. Palucis ; T. Parker ; Y. Parot ; K. Patel ; M. Paton ; G. Paulsen ; A. Pavlov ; B. Pavri ; V. Peinado-Gonzalez ; L. Peret ; R. Perez ; G. Perrett ; J. Peterson ; C. Pilorget ; P. Pinet ; J. Pla-Garcia ; I. Plante ; F. Poitrasson ; J. Polkko ; R. Popa ; L. Posiolova ; A. Posner ; I. Pradler ; B. Prats ; V. Prokhorov ; S. W. Purdy ; E. Raaen ; L. Radziemski ; S. Rafkin ; M. Ramos ; E. Rampe ; F. Raulin ; M. Ravine ; G. Reitz ; N. Renno ; M. Rice ; M. Richardson ; F. Robert ; K. Robertson ; J. A. Rodriguez Manfredi ; J. J. Romeral-Planello ; S. Rowland ; D. Rubin ; M. Saccoccio ; A. Salamon ; J. Sandoval ; A. Sanin ; S. A. Sans Fuentes ; L. Saper ; P. Sarrazin ; V. Sautter ; H. Savijarvi ; J. Schieber ; M. Schmidt ; W. Schmidt ; D. Scholes ; M. Schoppers ; S. Schroder ; S. Schwenzer ; E. Sebastian Martinez ; A. Sengstacken ; R. Shterts ; K. Siebach ; T. Siili ; J. Simmonds ; J. B. Sirven ; S. Slavney ; R. Sletten ; M. Smith ; P. Sobron Sanchez ; N. Spanovich ; J. Spray ; S. Squyres ; K. Stack ; F. Stalport ; T. Stein ; N. Stewart ; S. L. Stipp ; K. Stoiber ; E. Stolper ; B. Sucharski ; R. Sullivan ; R. Summons ; D. Sumner ; V. Sun ; K. Supulver ; B. Sutter ; C. Szopa ; F. Tan ; C. Tate ; S. Teinturier ; I. ten Kate ; P. Thomas ; L. Thompson ; R. Tokar ; M. Toplis ; J. Torres Redondo ; M. Trainer ; A. Treiman ; V. Tretyakov ; R. Urqui-O'Callaghan ; J. Van Beek ; T. Van Beek ; S. VanBommel ; D. Vaniman ; A. Varenikov ; A. Vasavada ; P. Vasconcelos ; E. Vicenzi ; A. Vostrukhin ; M. Voytek ; M. Wadhwa ; J. Ward ; E. Weigle ; D. Wellington ; F. Westall ; R. C. Wiens ; M. B. Wilhelm ; A. Williams ; J. Williams ; R. Williams ; R. B. Williams ; M. Wilson ; R. Wimmer-Schweingruber ; M. Wolff ; M. Wong ; J. Wray ; M. Wu ; C. Yana ; A. Yen ; A. Yingst ; C. Zeitlin ; R. Zimdar ; M. P. Zorzano Mier
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-07-23Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
3L. A. Leshin ; P. R. Mahaffy ; C. R. Webster ; M. Cabane ; P. Coll ; P. G. Conrad ; P. D. Archer, Jr. ; S. K. Atreya ; A. E. Brunner ; A. Buch ; J. L. Eigenbrode ; G. J. Flesch ; H. B. Franz ; C. Freissinet ; D. P. Glavin ; A. C. McAdam ; K. E. Miller ; D. W. Ming ; R. V. Morris ; R. Navarro-Gonzalez ; P. B. Niles ; T. Owen ; R. O. Pepin ; S. Squyres ; A. Steele ; J. C. Stern ; R. E. Summons ; D. Y. Sumner ; B. Sutter ; C. Szopa ; S. Teinturier ; M. G. Trainer ; J. J. Wray ; J. P. Grotzinger
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-09-28Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
4D. W. Ming ; P. D. Archer, Jr. ; D. P. Glavin ; J. L. Eigenbrode ; H. B. Franz ; B. Sutter ; A. E. Brunner ; J. C. Stern ; C. Freissinet ; A. C. McAdam ; P. R. Mahaffy ; M. Cabane ; P. Coll ; J. L. Campbell ; S. K. Atreya ; P. B. Niles ; J. F. Bell, 3rd ; D. L. Bish ; W. B. Brinckerhoff ; A. Buch ; P. G. Conrad ; D. J. Des Marais ; B. L. Ehlmann ; A. G. Fairen ; K. Farley ; G. J. Flesch ; P. Francois ; R. Gellert ; J. A. Grant ; J. P. Grotzinger ; S. Gupta ; K. E. Herkenhoff ; J. A. Hurowitz ; L. A. Leshin ; K. W. Lewis ; S. M. McLennan ; K. E. Miller ; J. Moersch ; R. V. Morris ; R. Navarro-Gonzalez ; A. A. Pavlov ; G. M. Perrett ; I. Pradler ; S. W. Squyres ; R. E. Summons ; A. Steele ; E. M. Stolper ; D. Y. Sumner ; C. Szopa ; S. Teinturier ; M. G. Trainer ; A. H. Treiman ; D. T. Vaniman ; A. R. Vasavada ; C. R. Webster ; J. J. Wray ; R. A. Yingst
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-12-11Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Bays ; Carbon Dioxide/analysis/chemistry ; *Exobiology ; Extraterrestrial Environment/*chemistry ; Geologic Sediments/analysis/chemistry ; Hydrocarbons, Chlorinated/*analysis ; *Mars ; Oxygen/analysis/chemistry ; Sulfides/analysis/chemistry ; Volatile Organic Compounds/*analysis ; Water/analysis/chemistryPublished by: -
5C. R. Webster ; P. R. Mahaffy ; S. K. Atreya ; G. J. Flesch ; M. A. Mischna ; P. Y. Meslin ; K. A. Farley ; P. G. Conrad ; L. E. Christensen ; A. A. Pavlov ; J. Martin-Torres ; M. P. Zorzano ; T. H. McConnochie ; T. Owen ; J. L. Eigenbrode ; D. P. Glavin ; A. Steele ; C. A. Malespin ; P. D. Archer, Jr. ; B. Sutter ; P. Coll ; C. Freissinet ; C. P. McKay ; J. E. Moores ; S. P. Schwenzer ; J. C. Bridges ; R. Navarro-Gonzalez ; R. Gellert ; M. T. Lemmon
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-12-18Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
6C. R. Webster ; P. R. Mahaffy ; S. K. Atreya ; G. J. Flesch ; K. A. Farley
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-09-21Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Atmosphere/*chemistry ; Bacteria/*metabolism ; *Exobiology ; *Mars ; Methane/analysis/*biosynthesis ; Spectrum Analysis/methodsPublished by: -
7P. R. Mahaffy ; C. R. Webster ; J. C. Stern ; A. E. Brunner ; S. K. Atreya ; P. G. Conrad ; S. Domagal-Goldman ; J. L. Eigenbrode ; G. J. Flesch ; L. E. Christensen ; H. B. Franz ; C. Freissinet ; D. P. Glavin ; J. P. Grotzinger ; J. H. Jones ; L. A. Leshin ; C. Malespin ; A. C. McAdam ; D. W. Ming ; R. Navarro-Gonzalez ; P. B. Niles ; T. Owen ; A. A. Pavlov ; A. Steele ; M. G. Trainer ; K. H. Williford ; J. J. Wray
American Association for the Advancement of Science (AAAS)
Published 2014Staff ViewPublication Date: 2014-12-18Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
8Staff View
Publication Date: 2018-06-08Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyGeosciencesComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Geochemistry, Geophysics, Planetary SciencePublished by: -
9Staff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] THE Voyager 1 coherent dual-frequency radio system (RSS) at wavelengths 3.6 and 13 cm provided the first look at a high latitude (73 S) ionospheric profile on Saturn1. The entry data reveal that near the evening terminator (solar zenith angle, f = 89), the peak electron density of 2.3 x 104 ...Type of Medium: Electronic ResourceURL: -
10Staff View
ISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] THE Voyager 1 radio science experiment (RSS) obtained electron density profiles for the daytime and night-time ionosphere of Jupiter by radio occultation observations on 5 March 19791. The properties of the ionosphere were different from those obtained by the Pioneer 10 and 11 observations2'3 in ...Type of Medium: Electronic ResourceURL: -
11Israël, G. ; Szopa, C. ; Raulin, F. ; Cabane, M. ; Niemann, H. B. ; Atreya, S. K. ; Bauer, S. J. ; Brun, J.-F. ; Chassefière, E. ; Coll, P. ; Condé, E. ; Coscia, D. ; Hauchecorne, A. ; Millian, P. ; Nguyen, M. J. ; Owen, T. ; Riedler, W. ; Samuelson, R. E. ; Siguier, J.-M. ; Steller, M. ; Sternberg, R. ; Vidal-Madjar, C.
[s.l.] : Nature Publishing Group
Published 2006Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Biemann et al. calls into question our preliminary interpretations of our experimental results. A comparison of laboratory and flight measurements should settle the uncertainties he raises. In addition to evaluating instrumental characteristics such as the 'piston effect', a technique we ...Type of Medium: Electronic ResourceURL: -
12Atreya, S. K. ; Bauer, S. J. ; Carignan, G. R. ; Demick, J. E. ; Frost, R. L. ; Gautier, D. ; Haberman, J. A. ; Harpold, D. N. ; Hunten, D. M. ; Israel, G. ; Lunine, J. I. ; Kasprzak, W. T. ; Owen, T. C. ; Paulkovich, M. ; Raulin, F. ; Raaen, E. ; Way, S. H. ; Niemann, H. B.
[s.l.] : Nature Publishing Group
Published 2005Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Saturn's largest moon, Titan, remains an enigma, explored only by remote sensing from Earth, and by the Voyager and Cassini spacecraft. The most puzzling aspects include the origin of the molecular nitrogen and methane in its atmosphere, and the mechanism(s) by which methane is maintained in ...Type of Medium: Electronic ResourceURL: -
13Szopa, C. ; Raulin, F. ; Cabane, M. ; Niemann, H. B. ; Atreya, S. K. ; Bauer, S. J. ; Brun, J.-F. ; Chassefière, E. ; Coll, P. ; Condé, E. ; Coscia, D. ; Hauchecorne, A. ; Millian, P. ; Nguyen, M.-J. ; Owen, T. ; Riedler, W. ; Samuelson, R. E. ; Siguier, J.-M. ; Steller, M. ; Sternberg, R. ; Vidal-Madjar, C. ; Israël, G.
[s.l.] : Nature Publishing Group
Published 2005Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Aerosols in Titan's atmosphere play an important role in determining its thermal structure. They also serve as sinks for organic vapours and can act as condensation nuclei for the formation of clouds, where the condensation efficiency will depend on the chemical composition of the ...Type of Medium: Electronic ResourceURL: -
14Staff View
ISSN: 1432-1432Keywords: Mars ; Solar radiationSource: Springer Online Journal Archives 1860-2000Topics: BiologyNotes: Summary Calculations indicate that the maximum daily solar radiation reaching the Martian surface is about 325 cal/cm2 during southern hemisphere summer at latitude of about 40°S. In the ultraviolet region of the spectrum, the radiation reaching the surface at wavelengths greater than 2800 Å is within 10% of the radiation incident on the atmosphere. There is significant extinction of radiation in the spectral region near 2500 Å in mid and high latitudes due to absorption of radiation by ozone; radiation reaching the surface may be reduced to one one-thousandth of that incident on the atmosphere during winter. Virtually no radiation of wavelengths less than 1900 Å reaches the surface because of absorption by the large column abundance of carbon dioxide. Daily and latitudinal distributions of radiation are presented for wavelengths of 3000, 2500 and 2000 Å.Type of Medium: Electronic ResourceURL: -
15Staff View
ISSN: 1573-0794Source: Springer Online Journal Archives 1860-2000Topics: GeosciencesPhysicsType of Medium: Electronic ResourceURL: -
16Drossart, P. ; Maillard, J.-P. ; Caldwell, J. ; Kim, S. J. ; Watson, J. K. G. ; Majewski, W. A. ; Tennyson, J. ; Miller, S. ; Atreya, S. K. ; Clarke, J. T. ; Waite, J. H. ; Wagener, R.
[s.l.] : Nature Publishing Group
Published 1989Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Observations of Jupiter were made at the CFHT with the Fourier Transform Spectrometer (FTS) during the night of 1988 September 24 (UT), between 2.0 and 2.2 jjum, with a 5-arcsec aperture, at constant jovian latitude (60 á°S). We observed H2 quadrupole ro-vibrational emission lines ...Type of Medium: Electronic ResourceURL: -
17Clarke, J. T. ; Moos, H. W. ; Atreya, S. K. ; Lane, A. L.
[s.l.] : Nature Publishing Group
Published 1981Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Spatial imaging with the IUE has been accomplished both in a series of exposures of different regions of the saturnian system and by sampling within the field-of-view of the large spectrograph entrance aperture in single exposures. The image of the field-of-view subtended by the aperture is focused ...Type of Medium: Electronic ResourceURL: -
18Israël, G. ; Szopa, C. ; Raulin, F. ; Cabane, M. ; Niemann, H. B. ; Atreya, S. K. ; Bauer, S. J. ; Brun, J.-F. ; Chassefière, E. ; Coll, P. ; Condé, E. ; Coscia, D. ; Hauchecorne, A. ; Millian, P. ; Nguyen, M. J. ; Owen, T. ; Riedler, W. ; Samuelson, R. E. ; Siguier, J.-M. ; Steller, M. ; Sternberg, R. ; Vidal-Madjar, C.
[s.l.] : Nature Publishing Group
Published 2006Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Biemann calls into question our preliminary interpretations of our experimental results. A comparison of laboratory and flight measurements should settle the uncertainties he raises. In addition to evaluating instrumental characteristics such as the 'piston effect', a technique we used ...Type of Medium: Electronic ResourceURL: -
19Broadfoot, A. L. ; Sandel, B. R. ; Shemansky, D. E. ; Atreya, S. K. ; Donahue, T. M. ; Moos, H. W. ; Bertaux, J. L. ; Blamont, J. E. ; Ajello, J. M. ; Strobel, D. F. ; McConnell, J. C. ; Dalgarno, A. ; Goody, R. ; McElroy, M. B. ; Yung, Y. L.
Springer
Published 1977Staff ViewISSN: 1572-9672Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract The Voyager Ultraviolet Spectrometer (UVS) is an objective grating spectrometer covering the wavelength range of 500–1700 Å with 10 Å resolution. Its primary goal is the determination of the composition and structure of the atmospheres of Jupiter, Saturn, Uranus and several of their satellites. The capability for two very different observational modes have been combined in a single instrument. Observations in the airglow mode measure radiation from the atmosphere due to resonant scattering of the solar flux or energetic particle bombardment, and the occultation mode provides measurements of the atmospheric extinction of solar or stellar radiation as the spacecraft enters the shadow zone behind the target. In addition to the primary goal of the solar system atmospheric measurements, the UVS is expected to make valuable contributions to stellar astronomy at wavelengths below 1000 Å.Type of Medium: Electronic ResourceURL: -
20Niemann, H. B. ; Harpold, D. N. ; Atreya, S. K. ; Carignan, G. R. ; Hunten, D. M. ; Owen, T. C.
Springer
Published 1992Staff ViewISSN: 1572-9672Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract The Galileo Probe Mass Spectrometer (GPMS) is a Probe instrument designed to measure the chemical and isotopic composition including vertical variations of the constituents in the atmosphere of Jupiter. The measurement will be performed by in situ sampling of the ambient atmosphere in the pressure range from approximately 150 mbar to 20 bar. In addition batch sampling will be performed for noble gas composition measurement and isotopic ratio determination and for sensitivity enhancement of non-reactive trace gases. The instrument consists of a gas sampling system which is connected to a quadrupole mass analyzer for molecular weight analysis. In addition two sample enrichment cells and one noble gas analysis cell are part of the sampling system. The mass range of the quadrupole analyzer is from 2 amu to 150 amu. The maximum dynamic range is 108. The detector threshold ranges from 10 ppmv for H2O to 1 ppbv for Kr and Xe. It is dependent on instrument background and ambient gas composition because of spectral interference. The threshold values are lowered through sample enrichment by a factor of 100 to 500 for stable hydrocarbons and by a factor of 10 for noble gases. The gas sampling system and the mass analyzer are sealed and evacuated until the measurement sequence is initiated after the Probe enters into the atmosphere of Jupiter. The instrument weighs 13.2 kg and the average power consumption is 13 W. The instrument follows a sampling sequence of 8192 steps and a sampling rate of two steps per second. The measurement period lasts appropriately 60 min through the nominal pressure and altitude range.Type of Medium: Electronic ResourceURL: