Now showing items 1-20 of 34

    • A 100-kg Class Titan Airplane Mission 

      Lemke, Lawrence (Georgia Institute of Technology, 2008-06-26)
      The combination of low gravity and high density of Titan's atmosphere makes powered, aerodynamic flight on that Saturnian moon energetically more favorable than at any other known location in the Solar System. Titan also ...
    • Ablation of Pica-Like Material: Surface or Volume Phenomenon? 

      Lachaud, Jean; Mansour, Nagi Nicolas (Georgia Institute of Technology, 2008-06-26)
      The ablation of the char layer in ablative material is usually described in term of recession velocity of the overall surface. This description is valid for dense materials. However, the recession of the average surface ...
    • Aerocapture Mission Concepts for Titan and Venus Exploration 

      Munk, Michelle Marie; Spilker, Thomas (Georgia Institute of Technology, 2008-06-24)
      Aerocapture has been studied for decades as a mass-efficient way to deliver orbiting spacecraft to planets or moons that have atmospheres. NASA's In-Space Propulsion Technology (ISPT) program sponsored detailed studies ...
    • Aerocapture Technology Developments by the In-Space Propulsion Technology Program 

      Munk, Michelle Marie (Georgia Institute of Technology, 2008-06-26)
      This paper will explain the investment strategy, the role of detailed systems analysis, and the hardware and modeling developments that have resulted from the past 5 years of work under NASA's In-Space Propulsion Technology ...
    • Arc-Jet Simulations of Ablators for the Mars Science Laboratory Program 

      Tang, Chun; White, Todd Richard (Georgia Institute of Technology, 2008-06-25)
      The NASA Ames team working with the Mars Science Laboratory (MSL) project has recently been involved in arc-jet tests to characterize the material response of candidate ablators to the high heat flux and high shear stress ...
    • Cone Angle Choices for Atmospheric Entry Vehicles: A Review 

      Tauber, Michael; Wright, Michael J. (Georgia Institute of Technology, 2008-06-24)
      The vast majority of past and proposed planetary atmospheric probes, landers and sample return vehicles have been blunted cones with cone angles ranging from 45 to 70 deg. The objective here is to explain the large variation ...
    • The Evolution of the MSL Heatshield 

      Driver, David M.; Slimko, Eric M.; Beck, Robin A. S. (Georgia Institute of Technology, 2008-06-26)
      The MSL entry vehicle will be experiencing aerothermal environments that no previous Mars entry vehicle has seen, and as such, will require a heatshield that no previous Mars entry vehicle has flown. Early assessments of ...
    • Exploring Venus with Balloons - Science Objectives and Mission Architectures for Small and Medium-Class Missions 

      Hall, Jeffery L.; Baines, Kevin H.; Zahnle, Kevin J.; Limaye, Sanjay; Atreya, Sushil K. (Georgia Institute of Technology, 2008-06-26)
      Following the trailblazing flights of the 1985 twin Soviet VEGA balloons, missions to fly in the skies of Venus have been proposed to both NASA's Discovery Program and ESA's Cosmic Visions amd are currently being planned ...
    • Instrument Accommodation on the Pioneer Venus and Galileo Probes 

      Bienstock, Bernard J. (Georgia Institute of Technology, 2008-06-24)
      Probe missions afford participating scientists the opportunity to perform in-situ measurements of atmospheric properties as well as planetary and satellite imaging. Extreme environments, limited volumes, modest levels of ...
    • Mars Entry Atmospheric Data System (MEADS) Requirements and Design for the Mars Science Laboratory (MSL) 

      Novak, Frank; Hutchinson, Mark; Mitchell, Michael; Munk, Michelle Marie; Parker, Peter (Georgia Institute of Technology, 2008-06-25)
      Each vehicle that lands on Mars provides a unique opportunity to study the atmospheric entry environment. Taking measurements of this environment will enable a better understanding of vehicle performance and design margins. ...
    • Mass Advantage of Titan Aerocapture 

      Strange, Nathan; Bairstow, Sarah; Spilker, Thomas (Georgia Institute of Technology, 2008-06-24)
      NASA's 2007 Titan Explorer study employed Titan aerocapture to place a spacecraft in orbit around Titan, while NASA's 2008 Titan / Saturn System Mission (TSSM) study enters Titan orbit propulsively. These two studies may ...
    • Miniature Probes for Planetary Atmospheric Exploration: Where Less Is More 

      Colaprete, Anthony (Georgia Institute of Technology, 2008-06-23)
    • Multi-Mission Earth Entry Vehicle Design Trade Space and Concept Development Strategy 

      Maddock, Robert (Georgia Institute of Technology, 2008-06-26)
      In recent years the sample return mission concept has gradually grown increased favor over in-situ missions. The successes of the Stardust and Genesis missions have clearly highlighted the advantages of bringing samples ...
    • NASA Crew Exploration Vehicle, Thermal Protection System, Lessons Learned 

      Venkatapathy, Ethiraj; Reuther, James (Georgia Institute of Technology, 2008-06-26)
      The Orion (CEV) thermal protection system (TPS) advanced development project (ADP) was initiated in late 2006 to reduce developmental risk by significant investment in multiple heat shield architectural solutions that can ...
    • NASA's Mars Exploration Program: The Evolving Next Decade 

      McCuistion, Doug (Georgia Institute of Technology, 2008-06-23)
      The current decade for NASA's Mars Exploration Program has been a remarkable success with the Odyssey and Mars Reconnaissance Orbiter (MRO) orbiters, twin rovers Spirit and Opportunity, and the Phoenix lander. These ...
    • An Overview of EDL Technology Investments in the NASA Fundamental Aeronautics Program 

      Alonso, Juan (Georgia Institute of Technology, 2008-06-23)
      The Hypersonics and Supersonics Projects of the NASA Fundamental Aeronautics Program have as one of their two key applications the High Mass Mars Entry System (HMMES). As such, the two projects are pursuing fundamental ...
    • Overview of Flagship Class Venus Mission Architectures 

      Cutts, James A.; Kwok, Johnny H.; Balint, Tibor S. (Georgia Institute of Technology, 2008-06-24)
      Introduction: To assess the feasibility and potential technology needs of a future planned Venus Flagship class mission, NASA is funding a mission study in this fiscal year (FY08). Such a mission was recommended in NASA's ...
    • Overview of the Mars Sample Return Earth Entry Vehicle 

      Corliss, James; Dillman, Robert (Georgia Institute of Technology, 2008-06-26)
      NASA's Mars Sample Return (MSR) project will bring Mars surface and atmosphere samples back to Earth for detailed examination. Langley Research Center's MSR Earth Entry Vehicle (EEV) is a core part of the mission, protecting ...
    • The Phoenix Mars Landing: An Initial Look 

      Cichy, Benjamin D.; Eldred, Daniel B.; Skulsky, Eli D.; Queen, Eric M.; Bailey, Erik S.; Chase, James P.; Prince, Jill L.; Lisano, Michael E.; Grover, Myron R.; Laufer, Paul E.; Desai, Prasun N. (Georgia Institute of Technology, 2008-06-25)
      NASA's Phoenix Mars Lander will make a landing on Mars on May 25th, 2008. Following on from the overview of the Phoenix entry, descent and landing (EDL) system given at IPPW5, an initial look at the Phoenix landing will ...
    • Physical & Computational Modeling of Heat Transfer for Titan Montgolfiere Balloons 

      Appeloe, Daniel; Nott, Julian; Colonius, Tim (Georgia Institute of Technology, 2008-06-24)
      Saturn's moon, Titan, is attracting intense scientific interest, leading in turn to wide interest in exploring it with Aerobots, balloons or airships. Their function would be similar to Mars Rovers but instead of moving ...