Now showing items 2-21 of 117

    • 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 ...
    • Acoustic Measurements on the Huygens Probe and Other Platforms: A Review 

      Lorenz, Ralph D. (Georgia Institute of Technology, 2008-06-24)
      The Huygens probe at Titan recorded broadband sound levels during descent and on the surface with a passive microphone processed with a spectrum analyzer (part of the HASI experiment) as well as an active acoustic sounder ...
    • 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 ...
    • Analysis of Temperature-Constrained Ballute Aerocapture for High-Mass Mars Payloads 

      Alexeenko, Alina A.; Longuski, James M.; Medlock, Kristin Gates (Georgia Institute of Technology, 2008-06-25)
      We investigate trajectories and heating environments of ballute-assisted, low- to high-mass Mars aerocapture systems. Ballutes permit aerocapture at higher altitudes and allow for lower thermal protection system (TPS) ...
    • Antenna Elements Integrated into the Parachutes of Planetary Entry Probes 

      Corral van Damme, Carlos; van der Vorst, Maarten; Guidi, Rodolfo; Benolol, Simon (Georgia Institute of Technology, 2008-06-25)
      The canopy of the parachutes of planetary entry probes may be used to integrate elements of the antennas in charge of the communications with the orbiter spacecraft during the descent. The additional surface provided by ...
    • 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 ...
    • Assessment of PWT Conditions for the STARDUST Post-Flight Evaluation 

      Herdrich, Georg; Roser, Hans-Peter; Fertig, Markus; Winter, Michael; Wernitz, Ricarda; Lohle, Stefan (Georgia Institute of Technology, 2008-06-25)
      On January 15th 2006, the STARDUST capsule re-entered Earth's atmosphere after its almost seven year journey with a re-entry speed of 12.8 km/s. Due to the nature of the mission, no diagnostics for the re-entry phase ...
    • Atromos: Mars Companion Mission, Mid Sized Polar Lander Investigation 

      Iskander, Ed; Hartman, Elsie; Ngo, Freddy; Lueng, Hingloi; Boronowsky, Kenny; Murbach, Marcus; Fernandez, Nelson; Pham, Nicholas; Papadopoulos, Periklis; Martinez, Ramon; Shah, Syed Ghazanfar (Georgia Institute of Technology, 2008-06-24)
      The polar regions of Mars offer a rich environment to search for signs of life. The Atromos probe was designed with the intent of investigating this polar region for evidence of life and to take atmospheric data in the ...
    • Autorotating Pararotor Decelerator Technology for Miniature Atmospheric Entry Probes 

      Howard, Austin (Georgia Institute of Technology, 2008-06-24)
      Research has been conducted on the feasibility and modeling of a pararotor decelerator platform for atmospheric and planetary science as part of a masters degree in Mechanical Engineering at the University of Idaho. The ...
    • Avionics Architectures and Components for Planetary Entry Probe Payloads and Systems 

      Fernandez-Leon, Agustin; Jameux, D.; Ilstad, J.; Suess, Martin; Armbruster, P.; Fabry, P.; Trautner, Roland; Weigand, R. (Georgia Institute of Technology, 2008-06-25)
      Like all complex spacecraft, planetary entry probes require reliable, performant and resource-efficient avionics to successfully fulfil their mission. Due to specific mission constraints and targets, high integration as ...
    • A Brief History of Mars Entry, Descent and Landing: 20 Minutes of Terror Followed by 5 Minutes of Q&A 

      Manning, Robert (Georgia Institute of Technology, 2008-06-27)
      Starting with the valiant attempts by the USSR to land the Mars 2 & 3 landers in 1971 through last month's Phoenix landing, Rob Manning will review the wild history of Mars landing attempts.
    • Challenges for the Heatshield Development of Sample Return Missions - An Overview on European Sample Return Studies and Requirements 

      Santovincenzo, A.; Ritter, Heiko; Walpot, L. (Georgia Institute of Technology, 2008-06-26)
      The atmospheric entry of the Earth return capsule of sample return mission is one of the most critical phases of sample return missions. The Earth return from extraterrestrial bodies (e.g. Mars, comets or asteroids) involves ...
    • Challenges of Designing the MarsNEXT Network 

      Geelen, Kelly; Tran, Philippe (Georgia Institute of Technology, 2008-06-26)
      In the European Space Agency's Aurora Programme, Europe has clearly identified the exploration of Mars as one of its main objectives, to contribute to the international effort on the exploration of the solar system. With ...
    • Characterization of CO2 Plasma Free Stream Conditions for Atmospheric Entry Simulation 

      Eichhorn, Christoph; Herdrich, Georg; Fertig, Markus; Winter, Michael; Auweter-Kurtz, Monika; Lein, Sebastian (Georgia Institute of Technology, 2008-06-24)
      Due to increased interest in future space exploration missions to Venus and Mars, e.g. ESA's ExoMars mission in the framework of the AURORA program, it is inevitable to develop adequate tools to simulate atmospheric entry ...
    • Characterization of LDMOS Devices in the Deep Cryogenic Regime 

      Kashyap, Avinash S.; Mantooth, H. A.; Mojarradi, M.; Mudholkar, M.; Vo, T. (Georgia Institute of Technology, 2008-06-25)
      LDMOS devices are increasingly gaining attention as they aid in easier integration with existing CMOS technologies. They are especially used in applications requiring higher operating voltages such as power management ...
    • Characterizing Exoplanet Atmospheres: A New Frontier 

      Swain, Mark (Georgia Institute of Technology, 2008-06-23)
      To answer the question: "Are we alone?"
    • Characterizing the Controllable Entry States and Reachable Sites for Planetary Landing 

      Benito, Joel; Mease, Kenneth (Georgia Institute of Technology, 2008-06-26)
      Future Mars missions requiring increased landing accuracy, higher landed mass, and higher elevation landing are driving the development of entry, descent and landing (EDL) technology. Understanding the envelope of trajectories ...
    • 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 ...
    • Development of a Robust Planetary Polarization Nephelometer 

      Saltzman, Adam J.; Banfield, Don (Georgia Institute of Technology, 2008-06-26)
      We are developing a polarization nephelometer using reliable, low power-consumption laser diodes, for use on future planetary decent probes. The laser diodes provide a polarization modulated illumination source which enables ...