Academic literature on the topic 'Lunar gravity field'

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Journal articles on the topic "Lunar gravity field"

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Lorin, Clément, Alain Mailfert, and Denis Chatain. "Magnetic-Field Modulation of Gravity: Martian, Lunar, and Time-Varying Gravity." Microgravity Science and Technology 23, no. 2 (April 24, 2010): 135–42. http://dx.doi.org/10.1007/s12217-010-9192-y.

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Sinha, Manoranjan, N. S. Gopinath, and N. K. Malik. "Lunar gravity field modeling critical analysis and challenges." Advances in Space Research 45, no. 2 (January 2010): 322–49. http://dx.doi.org/10.1016/j.asr.2009.10.006.

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Yan, Jianguo, Shanhong Liu, Chi Xiao, Mao Ye, Jianfeng Cao, Yuji Harada, Fei Li, Xie Li, and Jean-Pierre Barriot. "A degree-100 lunar gravity model from the Chang’e 5T1 mission." Astronomy & Astrophysics 636 (April 2020): A45. http://dx.doi.org/10.1051/0004-6361/201936802.

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Context. Chinese lunar missions have grown in number over the last ten years, with an increasing focus on radio science investigations. In previous work, we estimated two lunar gravity field models, CEGM01 and CEGM02. The recently lunar mission, Chang’e 5T1, which had an orbital inclination between 18 and 68 degrees, and collected orbital tracking data continually for two years, made an improved gravity field model possible. Aims. Our aim was to estimate a new lunar gravity field model up to degree and order 100, CEGM03, and a new tidal Love number based on the Chang’e 5T1 tracking data combined with the historical tracking data used in the solution of CEGM02. The new model makes use of tracking data with this particular inclination, which has not been used in previous gravity field modeling. Methods. The solution for this new model was based on our in-house software, LUGREAS. The gravity spectrum power, post-fit residuals after precision orbit determination (POD), lunar surface gravity anomalies, correlations between parameters, admittance and coherence with topography model, and accuracy of POD were analyzed to validate the new CEGM03 model. Results. We analyzed the tracking data of the Chang’e 5T1 mission and estimated the CEGM03 lunar gravity field model. We found that the two-way Doppler measurement accuracy reached 0.2 mm s−1 with 10 s integration time. The error spectrum shows that the formal error for CEGM03 was at least reduced by about 2 times below the harmonic degree of 20, when compared to the CEGM02 model. The admittance and correlation of gravity and topography was also improved when compared to the correlations for the CEGM02 model. The lunar potential Love number k2 was estimated to be 0.02430±0.0001 (ten times the formal error). Conclusions. From the model analysis and comparison of the various models, we identified improvements in the CEGM03 model after introducing Chang’e 5T1 tracking data. Moreover, this study illustrates how the low and middle inclination orbits could contribute better accuracy for a low degree of lunar gravity field.
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Konopliv, A. S. "Improved Gravity Field of the Moon from Lunar Prospector." Science 281, no. 5382 (September 4, 1998): 1476–80. http://dx.doi.org/10.1126/science.281.5382.1476.

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YAN, Jian-Guo, Jing-Song PING, Fei LI, K. Matsumoto, Guang-Li WANG, and Xian SHI. "Simulation of the Lunar Gravity Field Recovery Based on Lunar Solo and Bi-Orbiters." Chinese Journal of Geophysics 50, no. 2 (March 2007): 399–403. http://dx.doi.org/10.1002/cjg2.1048.

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Jianguo, Yan, Ping Jinsong, Li Fei, Cao Jianfeng, Huang Qian, and Fung Lihe. "Chang’E-1 precision orbit determination and lunar gravity field solution." Advances in Space Research 46, no. 1 (July 2010): 50–57. http://dx.doi.org/10.1016/j.asr.2010.03.002.

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Yan, Jianguo, Luyuan Xu, Fei Li, Koji Matsumoto, J. Alexis P. Rodriguez, Hideaki Miyamoto, and James M. Dohm. "Lunar core structure investigation: Implication of GRAIL gravity field model." Advances in Space Research 55, no. 6 (March 2015): 1721–27. http://dx.doi.org/10.1016/j.asr.2014.12.038.

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Floberghagen, Rune, Pieter Visser, and Frank Weischede. "Lunar albedo force modeling and its effect on low lunar orbit and gravity field determination." Advances in Space Research 23, no. 4 (January 1999): 733–38. http://dx.doi.org/10.1016/s0273-1177(99)00155-6.

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CHEN, Jun-Yong, Jin-Sheng NING, Chuan-Yin ZHANG, and Jia LUO. "On the Determination of the Lunar Gravity Field from the First Chinese Lunar Prospector Mission." Chinese Journal of Geophysics 48, no. 2 (March 2005): 303–11. http://dx.doi.org/10.1002/cjg2.654.

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Arinchev, S. V. "Spacecraft Motion in an Ultra-Low Lunar Orbit under Lunar Gravitational Anomalies." Proceedings of Higher Educational Institutions. Маchine Building, no. 2 (743) (February 2022): 75–84. http://dx.doi.org/10.18698/0536-1044-2022-2-75-84.

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The study centers around the interdisciplinary problem: gravimetry and celestial mechanics. A spacecraft is aimed at a flight from one point of the Moon to another at an altitude of 1 km in a flat circular orbit. Under gravitational anomalies, the orbit deviates from a circular one, acquiring a spatial character. To account for gravitational anomalies, we introduce the mass concentration method, according to which the resulting gravitational field is a superposition of elementary fields of individual mass concentrations (mascons). The elementary field of an individual mascon has four parameters: latitude, longitude, depth, and positive or negative mass. Each parameter of the mascon is associated with a pseudo-random variable with a uniform distribution law in a given interval. The pseudo-random values ??are generated by the Wichmann-Hill PRNG. The problem under consideration is reduced to the Cauchy problem with initial conditions. Under gravitational anomalies, a few orbits after the launch, the spacecraft falls onto the lunar surface. The study shows that one orbit is enough for a safe flight. The spacecraft moves in the specified ultra-low orbit under gravity-anomaly noise. Anomalous gravitational overload is 0.1 m/sec2.
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Books on the topic "Lunar gravity field"

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U, Sagitov M., ed. Lunar gravimetry. London: Academic Press, 1986.

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Book chapters on the topic "Lunar gravity field"

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Meng, Zhiguo, and Jinsong Ping. "Lunar Surface, Gravity Field." In Encyclopedia of Lunar Science, 1–6. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-05546-6_64-1.

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Floberghagen, Rune. "Lunar gravity field modelling experiments with European data sets." In Lunar Gravimetry, 135–75. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-90-481-9552-7_5.

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Floberghagen, Rune. "Assessment of modern lunar gravity field models through orbit analysis." In Lunar Gravimetry, 35–78. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-90-481-9552-7_3.

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Floberghagen, Rune. "Fundamentals of lunar gravity field recovery." In Astrophysics and Space Science Library, 7–34. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-90-481-9552-7_2.

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Maier, Andrea, and Oliver Baur. "Sensitivity of Simulated LRO Tracking Data to the Lunar Gravity Field." In Gravity, Geoid and Height Systems, 337–42. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10837-7_42.

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Hanada, Hideo, Takahiro Iwata, Qinghui Liu, Fuyuhiko Kikuchi, Koji Matsumoto, Sander Goossens, Yuji Harada, et al. "Overview of Differential VLBI Observations of Lunar Orbiters in SELENE (Kaguya) for Precise Orbit Determination and Lunar Gravity Field Study." In The Kaguya Mission to the Moon, 123–44. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-8122-6_6.

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"- Lunar Gravity Field Determination from Chang’E-1 and Other Missions’ Data." In Planetary Geodesy and Remote Sensing, 278–307. CRC Press, 2014. http://dx.doi.org/10.1201/b17624-15.

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Conference papers on the topic "Lunar gravity field"

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Liu Yingying, Liu Rui, and Zhou Jun. "Study on lunar gravity field and orbit control of lunar satellite." In 2010 3rd IEEE International Conference on Computer Science and Information Technology (ICCSIT 2010). IEEE, 2010. http://dx.doi.org/10.1109/iccsit.2010.5563559.

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Yan, Jian Guo, Jing Song Ping, Qian Huang, and Jian Feng Cao. "Chang'E-1 precision orbit determination and lunar gravity field solution." In 2009 15th Asia-Pacific Conference on Communications (APCC). IEEE, 2009. http://dx.doi.org/10.1109/apcc.2009.5375594.

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Enzer, Daphna G., Rabi T. Wang, and William M. Klipstein. "GRAIL — A microwave ranging instrument to map out the lunar gravity field." In 2010 IEEE International Frequency Control Symposium (FCS). IEEE, 2010. http://dx.doi.org/10.1109/freq.2010.5556264.

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Fahnestock, Eugene, Ryan Park, Dah-Ning Yuan, and Alexander Konopliv. "Spacecraft Thermal and Optical Modeling Impacts on Estimation Of the GRAIL Lunar Gravity Field." In AIAA/AAS Astrodynamics Specialist Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2012. http://dx.doi.org/10.2514/6.2012-4428.

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Garza-Cruz, Tryana, Masami Nakagawa, and Kris Zacny. "Numerical Simulation of Jet-Lifting under Variable Gravity Field." In 12th Biennial International Conference on Engineering, Construction, and Operations in Challenging Environments; and Fourth NASA/ARO/ASCE Workshop on Granular Materials in Lunar and Martian Exploration. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/41096(366)116.

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Herman, Cila, Shinan Chang, and Estelle Iacona. "Bubble Detachment in Variable Gravity Under the Influence of Electric Fields." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39688.

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The objective of the research is to investigate the behavior of individual air bubbles injected through an orifice into an electrically insulating liquid under the influence of a static electric field. Situations were considered with both uniform and nonuniform electric fields. Bubble formation and detachment were visualized in terrestrial gravity as well as for several levels of reduced gravity (lunar, martian and microgravity) using a high-speed video camera. Bubble volume, dimensions and contact angles at detachment were measured. In addition to the experimental studies, a simple model, predicting bubble characteristics at detachment in an initially uniform electric field was developed. The model, based on thermodynamic considerations, accounts for the level of gravity as well as the magnitude of the uniform electric field. The results of the study indicate that the level of gravity and the electric field magnitude significantly affect bubble behavior as well as shape, volume and dimensions.
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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, unlocked the rover typical mechanism (mast, manipulator), communicated with the earth or relay orbiter, etc. After the rover performance were reviewed, the rover can be controlled and walked to the planetary surface. Secondly, the field validation systems are given including such as the low gravity system, the integrated testing system, the rover model with its assistant equipment, the simulated lander, etc. Thirdly, the conditions of field tests are described including the slope of terrain surface, the obstacle distribution, the position of simulated lander, etc. The test results of Chinese lunar and Martian rover were shown. Finally, the egress process of Chinese rovers on Moon and Mars are described. The technical systems of field validation wear built firstly for Chinese lunar rover Chang’e-3 Yutu and improved for Chinese Martian rover Zhurong. The technical systems work well and can be used for the development of planetary rover in the future.
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