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  • 550 - Earth sciences  (1,214)
  • Lunar and Planetary Science and Exploration  (472)
  • AERODYNAMICS
  • 2010-2014  (1,686)
  • 2012  (1,686)
  • 1
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    Measurement of Clathrate Hydrate Thermodynamic Stability in the Presence of Ammonia (2012)
    In:  Other Sources
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    Publication Date: 2018-06-11
    Description: There is a lack of data available for the stability of clathrate hydrates in the presence of ammonia for low-to-moderate pressures in the 0-10 MPa range. Providing such data will allow for a better understanding of natural mass transfer processes on celestial bodies like Titan and Enceladus, on which destabilization of clathrates may be responsible for replenishment of gases in the atmosphere. The experimental process utilizes a custom-built gas handling system (GHS) and a cryogenic calorimeter to allow for the efficient testing of samples under varying pressures and gas species.
    Keywords: Lunar and Planetary Science and Exploration
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  • 2
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    Low-Latitude Ethane Rain on Titan (2012)
    In:  Other Sources
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    Publication Date: 2018-06-11
    Description: Cassini ISS observed multiple widespread changes in surface brightness in Titan's equatorial regions over the past three years. These brightness variations are attributed to rainfall from cloud systems that appear to form seasonally. Determining the composition of this rainfall is an important step in understanding the "methanological" cycle on Titan. I use data from Cassini VIMS to complete a spectroscopic investigation of multiple rain-wetted areas. I compute "before-and-after" spectral ratios of any areas that show either deposition or evaporation of rain. By comparing these spectral ratios to a model of liquid ethane, I find that the rain is most likely composed of liquid ethane. The spectrum of liquid ethane contains multiple absorption features that fall within the 2-micron and 5-micron spectral windows in Titan's atmosphere. I show that these features are visible in the spectra taken of Titan's surface and that they are characteristically different than those in the spectrum of liquid methane. Furthermore, just as ISS saw the surface brightness reverting to its original state after a period of time, I show that VIMS observations of later flybys show the surface composition in different stages of returning to its initial form.
    Keywords: Lunar and Planetary Science and Exploration
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  • 3
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    A Study on the Perceived Risk of Surface Sample Collection Systems in Proposal Formulation (2012)
    In:  Other Sources
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    Publication Date: 2018-06-11
    Description: This project compares design and proposal elements from multiple proposals and presents conclusions and recommendations for sampling systems. Contributions from this project include a list of common evaluation themes, concept and proposal-related strengths and weaknesses and ways in which self-identified risks relate the evaluation of the mission.
    Keywords: Lunar and Planetary Science and Exploration
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  • 4
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    Evaluating Core Quality for a Mars Sample Return Mission (2012)
    In:  Other Sources
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    Publication Date: 2018-06-11
    Description: Sample return missions, including the proposed Mars Sample Return (MSR) mission, propose to collect core samples from scientifically valuable sites on Mars. These core samples would undergo extreme forces during the drilling process, and during the reentry process if the EEV (Earth Entry Vehicle) performed a hard landing on Earth. Because of the foreseen damage to the stratigraphy of the cores, it is important to evaluate each core for rock quality. However, because no core sample return mission has yet been conducted to another planetary body, it remains unclear as to how to assess the cores for rock quality. In this report, we describe the development of a metric designed to quantitatively assess the mechanical quality of any rock cores returned from Mars (or other planetary bodies). We report on the process by which we tested the metric on core samples of Mars analogue materials, and the effectiveness of the core assessment metric (CAM) in assessing rock core quality before and after the cores were subjected to shocking (g forces representative of an EEV landing).
    Keywords: Lunar and Planetary Science and Exploration
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  • 5
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    Mar's Science Laboratory : Qualification Model Dirty Testing (QMDT) Support (2012)
    In:  Other Sources
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    Publication Date: 2018-06-11
    Description: The Martian missions of Spirit, Opportunity, and many others have sparked high interest in Mars which has led to Curiosity to answer questions that we have sought after for years. Has life ever existed on Mars? Through the collection and analyzation of samples, it will help to answer questions about the possibilities of life that may have existed on Mars, and we will gain valuable data about the planet Mars.
    Keywords: Lunar and Planetary Science and Exploration
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  • 6
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    Determining Asteroid Masses from Planetary Range: A Short Course in Parameter Estimation (2012)
    In:  Other Sources
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    Publication Date: 2018-06-11
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
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  • 7
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    On to Mars: Engineering for the Unknown (2012)
    In:  Other Sources
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    Publication Date: 2018-06-11
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
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  • 8
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    Science Traverses in the Canadian High Arctic (2012)
    In:  CASI
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    Publication Date: 2018-06-11
    Description: The presentation is divided into three parts. Part I is an overview of early expeditions to the High Arctic, and their political consequences at the time. The focus then shifts to the Geological Survey of Canada s mapping program in the North (Operation Franklin), and to the Polar Continental Shelf Project (PCSP), a unique organization that resides within the Government of Canada s Department of Natural Resources, and supports mapping projects and science investigations. PCSP is highlighted throughout the presentation so a description of mandate, budgets, and support infrastructure is warranted. In Part II, the presenter describes the planning required in advance of scientific deployments carried out in the Canadian High Arctic from the perspective of government and university investigators. Field operations and challenges encountered while leading arctic field teams in fly camps are also described in this part of the presentation, with particular emphasis on the 2008 field season. Part III is a summary of preliminary results obtained from a Polar Survey questionnaire sent out to members of the Arctic research community in anticipation of the workshop. The last part of the talk is an update on the analog program at the Canadian Space Agency, specifically, the Canadian Analog Research Network (CARN) and current activities related to Analog missions, 2009-2010.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Antarctic Exploration Parallels for Future Human Planetary Exploration: The Role and Utility of Long Range, Long Duration Traverses; 20, 173-203; NASA/CP-2012-217355
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  • 9
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    The Princess Elisabeth Station (2012)
    In:  CASI
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    Publication Date: 2018-06-11
    Description: Aware of the increasing impact of human activities on the Earth system, Belgian Science Policy Office (Belspo) launched in 1997 a research programme in support of a sustainable development policy. This umbrella programme included the Belgian Scientific Programme on Antarctic Research. The International Polar Foundation, an organization led by the civil engineer and explorer Alain Hubert, was commissioned by the Belgian Federal government in 2004 to design, construct and operate a new Belgian Antarctic Research Station as an element under this umbrella programme. The station was to be designed as a central location for investigating the characteristic sequence of Antarctic geographical regions (polynia, coast, ice shelf, ice sheet, marginal mountain area and dry valleys, inland plateau) within a radius of 200 kilometers (approx.124 miles) of a selected site. The station was also to be designed as "state of the art" with respect to sustainable development, energy consumption, and waste disposal, with a minimum lifetime of 25 years. The goal of the project was to build a station and enable science. So first we needed some basic requirements, which I have listed here; plus we had to finance the station ourselves. Our most important requirement was that we decided to make it a zero emissions station. This was both a philosophical choice as we thought it more consistent with Antarctic Treaty obligations and it was also a logistical advantage. If you are using renewable energy sources, you do not have to bring in all the fuel.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Antarctic Exploration Parallels for Future Human Planetary Exploration: The Role and Utility of Long Range, Long Duration Traverses; 14, 238-292; NASA/CP-2012-217355
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  • 10
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    NOR-USA Scientific Traverse of East Antarctica: Science and Logistics on a Three-Month Expedition Across Antarctica's Farthest Frontier (2012)
    In:  CASI
    Details
    Publication Date: 2018-06-11
    Description: Dr. Albert's current research is centered on transfer processes in porous media, including air-snow exchange in the Polar Regions and in soils in temperate areas. Her research includes field measurements, laboratory experiments, and theoretical modeling. Mary conducts field and laboratory measurements of the physical properties of natural terrain surfaces, including permeability, microstructure, and thermal conductivity. Mary uses the measurements to examine the processes of diffusion and advection of heat, mass, and chemical transport through snow and other porous media. She has developed numerical models for investigation of a variety of problems, from interstitial transport to freezing of flowing liquids. These models include a two-dimensional finite element code for air flow with heat, water vapor, and chemical transport in porous media, several multidimensional codes for diffusive transfer, as well as a computational fluid dynamics code for analysis of turbulent water flow in moving-boundary phase change problems.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Antarctic Exploration Parallels for Future Human Planetary Exploration: The Role and Utility of Long Range, Long Duration Traverses; 12, 204-228; NASA/CP-2012-217355
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