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Bell JF, Squyres SW, Herkenhoff KE, Maki JN, Arneson HM, Brown D, Collins SA, Dingizian A, Elliot ST, Hagerott EC, Hayes AG, Johnson MJ, Johnson JR, Joseph J, Kinch K, Lemmon MT, Morris RV, Scherr L, Schwochert M, Shepard MK, Smith GH, Sohl-Dickstein JN, Sullivan RJ, Sullivan WT, Wadsworth M. Mars Exploration Rover Athena Panoramic Camera (Pancam) investigation. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2003je002070] [Citation(s) in RCA: 209] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- J. F. Bell
- Department of Astronomy; Cornell University; Ithaca New York USA
| | - S. W. Squyres
- Department of Astronomy; Cornell University; Ithaca New York USA
| | | | - J. N. Maki
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - H. M. Arneson
- Department of Astronomy; Cornell University; Ithaca New York USA
| | - D. Brown
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - S. A. Collins
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - A. Dingizian
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - S. T. Elliot
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - E. C. Hagerott
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - A. G. Hayes
- Department of Astronomy; Cornell University; Ithaca New York USA
| | - M. J. Johnson
- Department of Astronomy; Cornell University; Ithaca New York USA
| | | | - J. Joseph
- Department of Astronomy; Cornell University; Ithaca New York USA
| | - K. Kinch
- Neils Bohr Institute; University of Copenhagen; Copenhagen Denmark
| | - M. T. Lemmon
- Department of Atmospheric Science; Texas A&M University; College Station Texas USA
| | | | - L. Scherr
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - M. Schwochert
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - M. K. Shepard
- Department of Geography and Geosciences; Bloomsburg University; Bloomsburg Pennsylvania USA
| | | | | | - R. J. Sullivan
- Department of Astronomy; Cornell University; Ithaca New York USA
| | - W. T. Sullivan
- Department of Astronomy; University of Washington; Seattle Washington USA
| | - M. Wadsworth
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
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Schuerger AC, Mancinelli RL, Kern RG, Rothschild LJ, McKay CP. Survival of endospores of Bacillus subtilis on spacecraft surfaces under simulated martian environments: implications for the forward contamination of Mars. ICARUS 2003; 165:253-276. [PMID: 14649627 DOI: 10.1016/s0019-1035(03)00200-8] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Experiments were conducted in a Mars simulation chamber (MSC) to characterize the survival of endospores of Bacillus subtilis under high UV irradiation and simulated martian conditions. The MSC was used to create Mars surface environments in which pressure (8.5 mb), temperature (-80, -40, -10, or +23 degrees C), gas composition (Earth-normal N2/O2 mix, pure N2, pure CO2, or a Mars gas mix), and UV-VIS-NIR fluence rates (200-1200 nm) were maintained within tight limits. The Mars gas mix was composed of CO2 (95.3%), N2 (2.7%), Ar (1.7%), O2 (0.2%), and water vapor (0.03%). Experiments were conducted to measure the effects of pressure, gas composition, and temperature alone or in combination with Mars-normal UV-VIS-NIR light environments. Endospores of B. subtilis, were deposited on aluminum coupons as monolayers in which the average density applied to coupons was 2.47 x 10(6) bacteria per sample. Populations of B. subtilis placed on aluminum coupons and subjected to an Earth-normal temperature (23 degrees C), pressure (1013 mb), and gas mix (normal N2/O2 ratio) but illuminated with a Mars-normal UV-VIS-NIR spectrum were reduced by over 99.9% after 30 sec exposure to Mars-normal UV fluence rates. However, it required at least 15 min of Mars-normal UV exposure to reduce bacterial populations on aluminum coupons to non-recoverable levels. These results were duplicated when bacteria were exposed to Mars-normal environments of temperature (-10 degrees C), pressure (8.5 mb), gas composition (pure CO2), and UV fluence rates. In other experiments, results indicated that the gas composition of the atmosphere and the temperature of the bacterial monolayers at the time of Mars UV exposure had no effects on the survival of bacterial endospores. But Mars-normal pressures (8.5 mb) were found to reduce survival by approximately 20-35% compared to Earth-normal pressures (1013 mb). The primary implications of these results are (a) that greater than 99.9% of bacterial populations on sun-exposed surfaces of spacecraft are likely to be inactivated within a few tens of seconds to a few minutes on the surface of Mars, and (b) that within a single Mars day under clear-sky conditions bacterial populations on sun-exposed surfaces of spacecraft will be sterilized. Furthermore, these results suggest that the high UV fluence rates on the martian surface can be an important resource in minimizing the forward contamination of Mars.
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Liu J. An assessment of the global, seasonal, and interannual spacecraft record of Martian climate in the thermal infrared. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002je001921] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wolff MJ. Constraints on the size of Martian aerosols from Thermal Emission Spectrometer observations. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2003je002057] [Citation(s) in RCA: 176] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Colaprete A. Formation of convective carbon dioxide clouds near the south pole of Mars. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2003je002053] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Clancy RT. Mars aerosol studies with the MGS TES emission phase function observations: Optical depths, particle sizes, and ice cloud types versus latitude and solar longitude. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2003je002058] [Citation(s) in RCA: 211] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bishop JL, Murchie SL, Pieters CM, Zent AP. A model for formation of dust, soil, and rock coatings on Mars: Physical and chemical processes on the Martian surface. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2001je001581] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Janice L. Bishop
- SETI Institute/NASA Ames Research Center; Moffett Field California USA
| | - Scott L. Murchie
- Applied Physics Laboratory; Johns Hopkins University; Laurel Maryland USA
| | - Carlé M. Pieters
- Department of Geological Sciences; Brown University; Providence Rhode Island USA
| | - Aaron P. Zent
- NASA Ames Research Center; Moffett Field California USA
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Montmessin F. New insights into Martian dust distribution and water-ice cloud microphysics. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2001je001520] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Johnson JR. Dust coatings on basaltic rocks and implications for thermal infrared spectroscopy of Mars. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2000je001405] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Edgett KS. Low-albedo surfaces and eolian sediment: Mars Orbiter Camera views of western Arabia Terra craters and wind streaks. ACTA ACUST UNITED AC 2002. [DOI: 10.1029/2001je001587] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Malin MC, Edgett KS. Mars Global Surveyor Mars Orbiter Camera: Interplanetary cruise through primary mission. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000je001455] [Citation(s) in RCA: 671] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Cantor BA, James PB, Caplinger M, Wolff MJ. Martian dust storms: 1999 Mars Orbiter Camera observations. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000je001310] [Citation(s) in RCA: 221] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Smith PH, Reynolds R, Weinberg J, Friedman T, Lemmon MT, Tanner R, Reid RJ, Marcialis RL, Bos BJ, Oquest C, Keller HU, Markiewicz WJ, Kramm R, Gliem F, Rueffer P. The MVACS Surface Stereo Imager on Mars Polar Lander. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/1999je001116] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Nakakushi T, Akabane T, Iwasaki K, Larson SM. Mars: The cloud effect on the blue clearing in the Syrtis Major region. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2000je001274] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Clancy RT, Sandor BJ, Wolff MJ, Christensen PR, Smith MD, Pearl JC, Conrath BJ, Wilson RJ. An intercomparison of ground-based millimeter, MGS TES, and Viking atmospheric temperature measurements: Seasonal and interannual variability of temperatures and dust loading in the global Mars atmosphere. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999je001089] [Citation(s) in RCA: 295] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Toigo AD, Richardson MI. Seasonal variation of aerosols in the Martian atmosphere. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999je001132] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Landis GA, Jenkins PP. Measurement of the settling rate of atmospheric dust on Mars by the MAE instrument on Mars Pathfinder. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999je001029] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bell JF, McSween HY, Crisp JA, Morris RV, Murchie SL, Bridges NT, Johnson JR, Britt DT, Golombek MP, Moore HJ, Ghosh A, Bishop JL, Anderson RC, Brückner J, Economou T, Greenwood JP, Gunnlaugsson HP, Hargraves RM, Hviid S, Knudsen JM, Madsen MB, Reid R, Rieder R, Soderblom L. Mineralogic and compositional properties of Martian soil and dust: Results from Mars Pathfinder. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999je001060] [Citation(s) in RCA: 230] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Golombek MP, Bridges NT. Erosion rates on Mars and implications for climate change: Constraints from the Pathfinder landing site. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999je001043] [Citation(s) in RCA: 146] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Edgett KS, Malin MC. New views of Mars eolian activity, materials, and surface properties: Three vignettes from the Mars Global Surveyor Mars Orbiter Camera. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999je001152] [Citation(s) in RCA: 125] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Golombek MP, Anderson RC, Barnes JR, Bell JF, Bridges NT, Britt DT, Brückner J, Cook RA, Crisp D, Crisp JA, Economou T, Folkner WM, Greeley R, Haberle RM, Hargraves RB, Harris JA, Haldemann AFC, Herkenhoff KE, Hviid SF, Jaumann R, Johnson JR, Kallemeyn PH, Keller HU, Kirk RL, Knudsen JM, Larsen S, Lemmon MT, Madsen MB, Magalhães JA, Maki JN, Malin MC, Manning RM, Matijevic J, McSween HY, Moore HJ, Murchie SL, Murphy JR, Parker TJ, Rieder R, Rivellini TP, Schofield JT, Seiff A, Singer RB, Smith PH, Soderblom LA, Spencer DA, Stoker CR, Sullivan R, Thomas N, Thurman SW, Tomasko MG, Vaughan RM, Wänke H, Ward AW, Wilson GR. Overview of the Mars Pathfinder Mission: Launch through landing, surface operations, data sets, and science results. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/98je02554] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Madsen MB, Hviid SF, Gunnlaugsson HP, Knudsen JM, Goetz W, Pedersen CT, Dinesen AR, Mogensen CT, Olsen M, Hargraves RB. The magnetic properties experiments on Mars Pathfinder. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1998je900006] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Thomas N, Markiewicz WJ, Sablotny RM, Wuttke MW, Keller HU, Johnson JR, Reid RJ, Smith PH. The color of the Martian sky and its influence on the illumination of the Martian surface. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/98je02556] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Smith PH, Lemmon M. Opacity of the Martian atmosphere measured by the Imager for Mars Pathfinder. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1998je900017] [Citation(s) in RCA: 114] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Markiewicz WJ, Sablotny RM, Keller HU, Thomas N, Titov D, Smith PH. Optical properties of the Martian aerosols as derived from Imager for Mars Pathfinder midday sky brightness data. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1998je900033] [Citation(s) in RCA: 98] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Johnson JR, Kirk R, Soderblom LA, Gaddis L, Reid RJ, Britt DT, Smith P, Lemmon M, Thomas N, Bell JF, Bridges NT, Anderson R, Herkenhoff KE, Maki J, Murchie S, Dummel A, Jaumann R, Trauthan F, Arnold G. Preliminary results on photometric properties of materials at the Sagan Memorial Station, Mars. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/98je02247] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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