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  • Lunar and Planetary Science and Exploration  (5)
  • GEOPHYSICS  (3)
  • 1
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    Report on the Loss of the Mars Polar Lander and Deep Space 2 Missions (2000)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: NASA's Mars Surveyor Program (MSP) began in 1994 with plans to send spacecraft to Mars every 26 months. Mars Global Surveyor (MGS), a global mapping mission, was launched in 1996 and is currently orbiting Mars. Mars Surveyor '98 consisted of Mars Climate Orbiter (MCO) and Mars Polar Lander (MPL). Lockheed Martin Astronautics (LMA) was the prime contractor for Mars Surveyor '98. The Jet Propulsion Laboratory (JPL), California Institute of Technology, manages the Mars Surveyor Program for NASA's Office of Space Science. MPL was developed under very tight funding constraints. The combined development cost of MPL and MCO, including the cost of the two launch vehicles, was approximately the same as the development cost of the Mars Pathfinder mission, including the cost of its single launch vehicle. The MPL project accepted the challenge to develop effective implementation methodologies consistent with programmatic requirements.
    Keywords: Lunar and Planetary Science and Exploration
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  • 2
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    Theoretical Calculations on Sediment Transport on Titan, and the Possible Production of Streamlined Forms (2005)
    In:  CASI
    Details
    Publication Date: 2017-10-02
    Description: The Cassini Imaging Science System (ISS) has been returning images of Titan, along with other Saturnian satellites. Images taken through the 938 nm methane window see down to Titan's surface. One of the purposes of the Cassini mission is to investigate possible fluid cycling on Titan. Lemniscate features shown recently and radar evidence of surface flow prompted us to consider theoretically the creation by methane fluid flow of streamlined forms on Titan. This follows work by other groups in theoretical consideration of fluid motion on Titan's surface.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science XXXVI, Part 2; LPI-Contrib-1234-Pt-2
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  • 3
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    First Results of the Athena Microscopic Imager Investigation (2004)
    In:  CASI
    Details
    Publication Date: 2018-06-11
    Description: The Athena science payload on the Mars Exploration Rovers (MER) includes the Microscopic Imager (MI). The MI is a fixed-focus camera mounted on an extendable arm, the Instrument Deployment Device (IDD). The MI acquires images at a spatial resolution of 30 microns/pixel over a broad spectral range (400 - 700 nm). The MI uses the same electronics design as the other MER cameras but its optics yield a field of view of 31 x 31 mm across a 1024 x 1024 pixel CCD image. The MI acquires images using only solar or skylight illumination of the target surface. A contact sensor is used to place the MI slightly closer to the target surface than its best focus distance (about 69 mm), allowing concave surfaces to be imaged in good focus. Coarse focusing (approx. 2 mm precision) is achieved by moving the IDD away from a rock target after contact is sensed. The MI optics are protected from the Martian environment by a retractable dust cover. This cover includes a Kapton window that is tinted orange to restrict the spectral bandpass to 500 - 700 nm, allowing crude color information to be obtained by acquiring images with the cover open and closed. The MI science objectives, instrument design and calibration, operation, and data processing were described by Herkenhoff et al. Initial results of the MI experiment on both MER rovers ('Spirit' and 'Opportunity') are described below.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science XXXV: Mars Missions; LPI-Contrib-1197
    Format: text
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  • 4
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    The upper atmosphere research satellite (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The Upper Atmosphere Research Satellite (UARS) will provide, for the first time, data on a global basis for the study of the physical processes acting witin and upon the stratosphere, mesosphere, and lower thermosphere. Specifically, the areas of scientifc study to be addressed are energy input and loss, photochemistry, dynamics, and the coupling among processes and between atmospheric regions. The UARS is a single observatory consisting of a multimission modular spacecraft (MMS) and an instrument module containing 10 scientific instruments. The satellite will be Shuttle launched and placed in a 57 deg inclined orbit at 600 km altitude. A Central Data Handling Facility (CDHF) will receive data from the satellite and process these data into atmospheric quantities for use by the science team. The 'processed' data will be stored at the CDHF and will be available via communication lines for analysis by the investigators at their home laboratories using remote computers. Together with other satellite programs, balloons, sounding rockets, and laboratory efforts, UARS will make available the opportunity for extensive coordination of data devoted to solar terrestrial study.
    Keywords: GEOPHYSICS
    Type: AIAA PAPER 84-0482
    Format: text
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  • 5
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    Distant Secondary Craters and Age Constraints on Young Martian Terrains (2005)
    In:  CASI
    Details
    Publication Date: 2017-10-02
    Description: Are small (less than approx. 1 km diameter) craters on Mars and the Moon dominated by primary impacts, by secondary impacts of much larger primary craters, or are both primaries and secondaries significant? This question is critical to age constraints for young terrains and for older terrains covering small areas, where only small craters are superimposed on the unit. If the martian rayed crater Zunil is representative of large impact events on Mars, then the density of secondaries should exceed the density of primaries at diameters a factor of ~1000 smaller than that of the largest contributing primary crater. On the basis of morphology and depth/diameter measurements, most small craters on Mars could be secondaries. Two additional observations (discussed below) suggest that the production functions of Hartmann and Neukum predict too many primary craters smaller than a few hundred meters in diameter. Fewer small, high-velocity impacts may explain why there appears to be little impact regolith over Amazonian terrains. Martian terrains dated by small craters could be older than reported in recent publications.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science XXXVI, Part 13; LPI-Contrib-1234-Pt-13
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  • 6
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    Basaltic Ring Structures as an Analog for Ring Features in Athabasca Valles, Mars (2005)
    In:  CASI
    Details
    Publication Date: 2017-10-02
    Description: Basaltic ring structures (BRSs) are enigmatic, quasi-circular landforms in eastern Washington State that were first recognized in 1965. They remained a subject of geologic scrutiny through the 1970 s and subsequently faded from the spotlight, but recent Mars Orbiter Camera (MOC) images showing morphologically similar structures in Athabasca Valles, Mars, have sparked renewed interest in BRSs. The only known BRSs occur in the Channeled Scabland, a region where catastrophic Pleistocene floods from glacial Lake Missoula eroded into the Miocene flood basalts of the Columbia Plateau. The geologic setting of the martian ring structures (MRSs) is similar; Athabasca Valles is a young channel system that formed when catastrophic aqueous floods carved into a volcanic substrate. This study investigates the formation of terrestrial BRSs and examines the extent to which they are appropriate analogs for the MRSs in Athabasca Valles.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science XXXVI, Part 10; LPI-Contrib-1234-Pt-10
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  • 7
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    Statistical summary of air quality data for metropolitian Cleveland, Ohio, 1967 - 1972: Total suspended particulates, nitrogen dioxide, and sulfur dioxide (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Air-quality data for metropolitan Cleveland, Ohio, from 1967 through 1972 were collated and statistically analyzed. Total suspended particulates (TSP) departed from lognormal distribution in 1972. Nitrogen dioxide and sulfur dioxide, departed significantly from lognormal distributions in 1972. In Cleveland the Ohio standards were not met. However, the data indicate a general improvement in air quality. Unusually high precipitation (43% above the average in 1972) may be responsible in lowering these values from the 1971 levels. The mean values of TSP, NO2, and SO2 are 104, 191, and 83 microgram/cu m respectively.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-3113 , E-7850
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  • 8
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    Preliminary analysis of an extensive one year survey of trace elements and compounds in the suspended particulate matter in Cleveland, Ohio (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Preliminary review of a study of trace elements and compound concentrations in the ambient suspended particulate matter in Cleveland, Ohio, measured from August 1971 through June 1973, as a function of source, monitoring location, and meteorological conditions. The study is aimed at the development of techniques for identifying specific pollution sources which could be integrated into a practical system readily usable by an enforcement agency.
    Keywords: GEOPHYSICS
    Type: Earth Environmental Resources Conference; Sept. 10-12, 1974; Philadelphia, PA
    Format: text
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