Academic literature on the topic 'Planetary Gravity'

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Journal articles on the topic "Planetary Gravity"

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Lal, Ashwini Kumar. "On Planetary Electromagnetism and Gravity." International Journal of Astronomy and Astrophysics 01, no. 02 (2011): 62–66. http://dx.doi.org/10.4236/ijaa.2011.12009.

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Nerem, R. S. "Terrestrial and planetary gravity fields." Reviews of Geophysics 33 (1995): 469. http://dx.doi.org/10.1029/95rg00742.

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Scheffler, Guillermo, and Manuel Pulido. "Compensation between Resolved and Unresolved Wave Drag in the Stratospheric Final Warmings of the Southern Hemisphere." Journal of the Atmospheric Sciences 72, no. 11 (2015): 4393–411. http://dx.doi.org/10.1175/jas-d-14-0270.1.

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Abstract The role of planetary wave drag and gravity wave drag in the breakdown of the stratospheric polar vortex and its associated final warming in the Southern Hemisphere is examined using reanalyses from MERRA and a middle-atmosphere dynamical model. The focus of this work is on identifying the causes of the delay in the final breakdown of the stratospheric polar vortex found in current general circulation models. Sensitivity experiments were conducted by changing the launched momentum flux in the gravity wave drag parameterization. Increasing the launched momentum flux produces a delay of
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Hamouda, Samir A., Eman A. Alsslam Alfadeel, and Mohamed Belhasan Mohamed. "PLANETARY MAGNETIC FIELD AND GRAVITY IN THE SOLAR SYSTEM." International Journal of Research -GRANTHAALAYAH 5, no. 9 (2017): 145–51. http://dx.doi.org/10.29121/granthaalayah.v5.i9.2017.2224.

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Gravity plays a major role in the planetary formation and the development of the solar system. Gravity attraction is the essence of a power that holds and governs the universe; it makes the planets in the solar system revolve around the sun and the moons around their planets. Magnetic fields are also an important phenomenon in the solar system and beyond. Their causes are complex and have a variety of effects on their surroundings; they have become a critical tool for the exploration of solar system bodies. However, the study of the mechanisms of planets formation in the solar system is a diff
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Samir, A. Hamouda, A. Alsslam Alfadeel Eman, and Belhasan Mohamed Mohamed. "PLANETARY MAGNETIC FIELD AND GRAVITY IN THE SOLAR SYSTEM." International Journal of Research - Granthaalayah 5, no. 9 (2017): 145–51. https://doi.org/10.5281/zenodo.1002135.

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Gravity plays a major role in the planetary formation and the development of the solar system. Gravity attraction is the essence of a power that holds and governs the universe; it makes the planets in the solar system revolve around the sun and the moons around their planets. Magnetic fields are also an important phenomenon in the solar system and beyond. Their causes are complex and have a variety of effects on their surroundings; they have become a critical tool for the exploration of solar system bodies. However, the study of the mechanisms of planets formation in the solar system is a diff
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Campbell, Lucy J., and Theodore G. Shepherd. "Constraints on Wave Drag Parameterization Schemes for Simulating the Quasi-Biennial Oscillation. Part II: Combined Effects of Gravity Waves and Equatorial Planetary Waves." Journal of the Atmospheric Sciences 62, no. 12 (2005): 4196–205. http://dx.doi.org/10.1175/jas3617.1.

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Abstract This study examines the effect of combining equatorial planetary wave drag and gravity wave drag in a one-dimensional zonal mean model of the quasi-biennial oscillation (QBO). Several different combinations of planetary wave and gravity wave drag schemes are considered in the investigations, with the aim being to assess which aspects of the different schemes affect the nature of the modeled QBO. Results show that it is possible to generate a realistic-looking QBO with various combinations of drag from the two types of waves, but there are some constraints on the wave input spectra and
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Pérez-Cuéllar, G., and M. Sabido. "On planetary orbits in entropic gravity." Modern Physics Letters A 36, no. 08 (2021): 2150050. http://dx.doi.org/10.1142/s0217732321500504.

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Starting with an entropy that includes volumetric, area and length terms as well as logarithmic contributions, we derive the corresponding modified Newtonian gravity and derive the expression for planetary orbits. We calculate the shift of the perihelion of Mercury to find bounds to the parameters associated to the modified Newtonian gravity. We compare the parameter associated to the volumetric contribution in the entropy-area relationship with the value derived for galactic rotation curves and the value obtained from the cosmological constant.
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Fienga, A., J. Laskar, P. Kuchynka, C. Leponcin-Lafitte, H. Manche, and M. Gastineau. "Gravity tests with INPOP planetary ephemerides." Proceedings of the International Astronomical Union 5, S261 (2009): 159–69. http://dx.doi.org/10.1017/s1743921309990330.

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AbstractWe present here several gravity tests made with the latest INPOP08 planetary ephemerides. We first propose two methods to estimate the PPN parameter β and its correlated value, the Sun J2, and we discuss the correlation between the Sun J2 and the mass of the asteroid ring. We estimate a possible advance in the planet perihelia. We also show that no constant acceleration larger than 1/4 of the Pioneer anomaly is compatible with the observed motion of the planets in our Solar System.
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Khantadze, A. G., G. V. Jandieri, A. Ishimaru, T. D. Kaladze, and Zh M. Diasamidze. "Electromagnetic oscillations of the Earth's upper atmosphere (review)." Annales Geophysicae 28, no. 7 (2010): 1387–99. http://dx.doi.org/10.5194/angeo-28-1387-2010.

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Abstract. A complete theory of low-frequency MHD oscillations of the Earth's weakly ionized ionosphere is formulated. Peculiarities of excitation and propagation of electromagnetic acoustic-gravity, MHD and planetary waves are considered in the Earth's ionosphere. The general dispersion equation is derived for the magneto-acoustic, magneto-gravity and electromagnetic planetary waves in the ionospheric E- and F-regions. The action of the geomagnetic field on the propagation of acoustic-gravity waves is elucidated. The nature of the existence of the comparatively new large-scale electromagnetic
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Niksirat, Parna, Adriana Daca, and Krzysztof Skonieczny. "The effects of reduced-gravity on planetary rover mobility." International Journal of Robotics Research 39, no. 7 (2020): 797–811. http://dx.doi.org/10.1177/0278364920913945.

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One of the major challenges faced by planetary exploration rovers today is the negotiation of difficult terrain, such as fine granular regolith commonly found on the Moon and Mars. Current testing methods on Earth fail to account for the effect of reduced gravity on the soil itself. This work characterizes the effects of reduced gravity on wheel–soil interactions between an ExoMars rover wheel prototype and a martian soil simulant aboard parabolic flights producing effective martian and lunar gravitational accelerations. These experiments are the first to collect wheel–soil interaction imagery
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Dissertations / Theses on the topic "Planetary Gravity"

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Wright, Corwin. "Detection of stratospheric gravity waves using HIRDLS data." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:ef4aa65d-67c1-43ac-90de-1b5bda6c8230.

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Temperature measurements from the HIRDLS instrument on NASA's Aura satellite are analysed for the purposes of detecting and studying internal gravity waves in the terrestrial stratosphere. A detailed description of the methodology used to obtain these data is given, including details of the instrument correction processes used to compensate for errors introduced by a blockage in the instrument optics. A short precis of the relevant theoretical considerations related to atmospheric gravity waves is then outlined. The thesis then discusses the use of the Stockwell (time-frequency) Transform for
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Hoffmann, Peter. "Planetary Wave Coupling between Stratosphere and Ionosphere by Gravity Wave Modulation." Doctoral thesis, Universitätsbibliothek Leipzig, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-71533.

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The ionosphere-thermosphere can be considered to a certain degree as a system, which is externally-driven by the extreme-ultraviolet solar radiation. The main components in the regular variation are connected to the solar cycle, solar rotation and the diurnal cycle. However, anomalies and periodicities of several days, which cannot be related to changes in the solar activity at all times, were detected in ionospheric parameters. It is assumed that the total variation in the ionosphere is partly forced by waves coming from below. This thesis provides a clearer picture of the seasonal changes of
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Krishnamurthy, Venkataramanaiah. "The slow manifold and the persisting gravity waves." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/54304.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1985.<br>Microfiche copy available in Archives and Science.<br>Bibliography: leaves 144-146.<br>by Venkataramanaiah Krishnamurthy.<br>Ph.D.
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Lyon-Caen, Hélène. "Deep structure of the Himalaya and Tibet from gravity and seismological data." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/54953.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1986.<br>Microfiche copy available in Archives and Science<br>Includes bibliographies.<br>by Hélène Lyon-Caen.<br>Ph.D.
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Ermakov, Anton. "Geophysical investigation of Vesta, Ceres and the Moon using gravity and topography data." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108901.

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Thesis: Ph. D. in Planetary Science, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 236-262).<br>The shape and gravity field are fundamental properties of a planetary body. Combining gravity and topography data sets is, arguably, the most powerful tool to study planetary interiors from orbit. However, even when gravity and topography data are in hand, typically, a wide range of possible geophysical structures is possible. The reader will find that this
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Nappo, Carmen Joseph. "A theoretical investigation of gravity-wave-generated stress and vorticity in the planetary boundary layer." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/25697.

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Lee, Sang-Mook. "Tectonics of the East Pacific rise : studies of faulting characteristics and magnetic and gravity anomalies." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/54403.

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Chappell, Steven Patrick. "Analysis of planetary exploration spacesuit systems and evaluation of a modified partial-gravity simulation technique." Diss., Connect to online resource, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3219007.

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Hoffmann, Peter, and Christoph Jacobi. "Connection of Planetary Waves in the Stratosphere and Ionosphere by the Modulation of Gravity Waves." Universität Leipzig, 2010. https://ul.qucosa.de/id/qucosa%3A16359.

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A possible connection of planetary waves (PW) and ionospheric planetary wave type oscillations (PWTO) at midlatitudes is studied by analyzing MetOffice stratospheric reanalysis data and maps of the Total Electron Content. Although the seasonal variability looks similar, the vertical coupling between stratosphere and ionosphere is known to only happen indirectly through processes such as the modulation of gravity waves (GW) by PW. To investigate possible coupling processes, information about GW are retrieved from SABER temperature profiles (30-130 km) by calculating the potential energy (Ep) an
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Simons, Mark. "Localization of gravity and topography : constraints on the tectonics and mantle dynamics of Earth and Venus." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/58356.

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Books on the topic "Planetary Gravity"

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National Research Council (U.S.). Committee on Microgravity Research., ed. Microgravity research in support of technologies for the human exploration and development of space and planetary bodies. National Academy Press, 2000.

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United States. National Aeronautics and Space Administration. Scientific and Technical Information Program., ed. High degree gravitational sensitivity from Mars orbiters for the GMM-1 gravity model. National Aeronautics and Space Administration, Scientific and Technical Information Program, 1993.

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G, Bills Bruce, Nerem R. Steven 1960-, and United States. National Aeronautics and Space Administration., eds. An inversion of gravity and topography for mantle and crustal structure on Mars. National Aeronautics and Space Administration, 1997.

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David, Sandwell, and United States. National Aeronautics and Space Administration., eds. Bounds on lithospheric thickness on Venus from Magellan gravity and topography data: NASA grant NAGW-4784 : final report. National Aeronautics and Space Administration, 1997.

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L, Sjogren William, and Jet Propulsion Laboratory (U.S.), eds. The JPL Mars gravity field, Mars50c, based upon Viking and Mariner 9 doppler tracking data. National Aeronautics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology, 1995.

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L, Sjogren William, and Jet Propulsion Laboratory (U.S.), eds. The JPL Mars gravity field, Mars50c, based upon Viking and Mariner 9 doppler tracking data. National Aeronautics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology, 1995.

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Johns Hopkins University. Dept. of Earth and Planetary Sciences. and United States. National Aeronautics and Space Administration., eds. Annual progress report ... between NASA and the Department of Earth and Planetary Sciences, the Johns Hopkins University, ... entitled "The delineation and interpretation of the earth's gravity field". The Dept., 1988.

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Starostenko, Vitaliĭ Ivanovich. Metodika reshenii͡a︡ pri͡a︡mykh zadach gravimetrii i magnitometrii na sharoobraznykh planetakh. Nauk. dumka, 1986.

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Hiton, Lisa. Gravity, Orbiting Objects, and Planetary Motion. Cavendish Square, 2017.

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Hiton, Lisa, and Caitlyn Miller. Gravity, Orbiting Objects, and Planetary Motion. Cavendish Square Publishing LLC, 2016.

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Book chapters on the topic "Planetary Gravity"

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Hargitai, Henrik. "Complex Crater (Low Gravity)." In Encyclopedia of Planetary Landforms. Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4614-9213-9_612-1.

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Hargitai, Henrik. "Complex Crater (Low Gravity)." In Encyclopedia of Planetary Landforms. Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-3134-3_612.

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Baur, Oliver. "Gravity Field of Planetary Bodies." In Encyclopedia of Geodesy. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-02370-0_46-1.

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MacDougal, Douglas W. "The Geometry of the Solar System: Kepler’s Laws of Planetary Motion." In Newton's Gravity. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-5444-1_4.

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MacDougal, Douglas W. "Newton Demonstrates How an Inverse Square Law Could Explain Planetary Motions." In Newton's Gravity. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-5444-1_7.

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Bussotti, Paolo. "Gravity and Cosmology." In The Complex Itinerary of Leibniz’s Planetary Theory. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-21236-4_5.

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Bender, Peter L. "Integrated Laser Doppler Method for Measuring Planetary Gravity Fields." In From Mars to Greenland: Charting Gravity With Space and Airborne Instruments. Springer New York, 1992. http://dx.doi.org/10.1007/978-1-4613-9255-2_6.

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Zotov, Leonid V., C. K. Shum, and Natalya L. Frolova. "Gravity Changes over Russian River Basins from GRACE." In Planetary Exploration and Science: Recent Results and Advances. Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-45052-9_3.

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Paldor, Nathan. "Planetary and Inertia-Gravity Waves on the Rotating Spherical Earth." In Shallow Water Waves on the Rotating Earth. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20261-7_6.

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Elstner, Claus, Martina Harnisch, and Wolfgang Schwahn. "Planetary Waves in the Spectra of Air Pressure and Gravity Variations." In Geodesy and Physics of the Earth. Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78149-0_47.

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Conference papers on the topic "Planetary Gravity"

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White, Robert A. "Generating Artificial Gravity on Planetary Bodies." In 55th AIAA Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-1447.

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MCRONALD, ANGUS, and JAMES RANDOLPH. "Hypersonic maneuvering to provide planetary gravity assist." In 28th Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics, 1990. http://dx.doi.org/10.2514/6.1990-539.

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Deng, Zongquan, Zhen Liu, Haibo Gao, and Liang Ding. "An approach for gravity compensation of planetary rovers." In 2010 3rd International Symposium on Systems and Control in Aeronautics and Astronautics (ISSCAA 2010). IEEE, 2010. http://dx.doi.org/10.1109/isscaa.2010.5634038.

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Kobayashi, Taizo, Hidetoshi Ochiai, Junya Yamakawa, et al. "Mobility Characterization of Planetary Rover in Reduced Gravity Environment." In 008. AIP, 2008. http://dx.doi.org/10.1063/1.2845042.

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Takahashi, Yu, Daniel Grebow, Brian Kennedy, Nicolas Rambaux, and Julie Castillo-Rogez. "Forward modeling of Ceres' Gravity Field for Planetary Protection Assessment." In AIAA/AAS Astrodynamics Specialist Conference. American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-5262.

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Wei, Jing, Lei Shi, Aiqiang Zhang, and Datong Qin. "Modeling and Dynamic Characteristics of Planetary Gear Transmission in Non-Inertial System of Aerospace Environment." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97193.

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Abstract The traditional research on the dynamics of planetary gear transmission system is based on the assumption that the support is on the ground. However, the planetary gear transmission system inside the aircraft is spatially moved along with the airframe, which is not only subject to gravity, but also to convected inertia force and Coriolis inertia force, as well as gyroscopic moment. These loads affect the dynamic characteristics of the planetary gear transmission system. In order to investigate the dynamic behavior of planetary gear transmission system in non-inertial system of aerospa
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Johnson, Shawn C., Alex J. Pini, David M. Reeves, A. Miguel San Martin, Keith D. DeWeese, and John R. Brophy. "The effects of constrained electric propulsion on gravity tractors for planetary defense." In 2017 IEEE Aerospace Conference. IEEE, 2017. http://dx.doi.org/10.1109/aero.2017.7943774.

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Asmar, Sami W. "URSI-Istanbul: Precision radio science for planetary gravity, atmospheric and surface investigations." In 2011 XXXth URSI General Assembly and Scientific Symposium. IEEE, 2011. http://dx.doi.org/10.1109/ursigass.2011.6051211.

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Dang, Zhaolong, Jirong Zhang, and Baichao Chen. "Field Validation of Egress Process for Planetary Rover." In 11th Asia-Pacific Regional Conference of the ISTVS. International Society for Terrain-Vehicle Systems, 2022. http://dx.doi.org/10.56884/uoud6258.

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After the planetary spacecraft landed on the surface, the rovers carried on the spacecraft will be powered up and arrived to the planetary surface after complex self-testing procedures. In order to validation of these procedures, the test conditions should be built in the proving ground. The technical systems of field validation for egress process of planetary rover are shown in this paper. Firstly, the Chinese rover egress procedures are described. The typical procedures include several steps such as the unlocked the fixed mechanisms of the rover body, powered up the rover through the lander,
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Meissinger, Hans, and Simon Dawson. "SEP planetary missions with Earth gravity assist using an initial out-of-ecliptic thrust phase." In 35th Joint Propulsion Conference and Exhibit. American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-2869.

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