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From page 37... ... and internal processes These include gravitational interacuons with other planets and satellites, solid and oceanic tidal f r ic t ion , and coremantle coupling mechanisms Surface climatic processes and tectonic activity can also affect a planet's onentauon and external gravity field The object o f these studies is to develop more sophisticated models fo r these and related interactions and apply them to appropriate solar-system bodies to obtain constraints on internal structure and to derive testable predicuons Opportunities also exist f o r analysis and interpretation o f modern Earth orientation data, e g , vination in Earth rotation, polar motion, and nutation, m light o f the above mechanisms Systems Division Satellite-Systems Dynamics J H Lieske 44 40 85 01 This program consists o f studying the motions o f outer planet natural satellites to improve the knowledge o f physical and dynamical parameters describing these complex systems Physical parameters include size and shape o f these bodies, and dynamical parameters include planet and satellite masses, lower-order zonal harmonics, spin-axis orientations, rotational rates, and ephemerides Analytic theories would be used to model the motions o f these systems f o r processing classical and modern posiuonal observations Classical observations would include conventional eclipse and photographic data, while modern observations would include photoelectric, radar, and Voyager spacecraft data The program is concentrating primari ly on the Galilean satellites o f Jupiter and the major satellites o f Saturn, Uranus, and Neptune Experimental Relativity and Celestial Mechanics J D Anderson R W Hellmgs E M Standish,Jr 44 40 85.02 A considerable base o f reduced spacecraft radio range and Doppler data obtained by the NASA/JPL Deep Space Net (DSN) is available at JPL, and plans are under way to acquire additional data on fu ture missions, e g , the Galileo Orbiter at Jupiter We are interested i n proposals that either address the analysis o f a specific subset o f data or that contribute to a better understanding o f the physical models needed f o r the analysis and interpretauon o f data The emphasis at present is on (1) Read the entire page →

From page 37...

... and internal processes These include gravitational interacuons with other planets and satellites, solid and oceanic tidal f r ic t ion , and coremantle coupling mechanisms Surface climatic processes and tectonic activity can also affect a planet's onentauon and external gravity field The object o f these studies is to develop more sophisticated models fo r these and related interactions and apply them to appropriate solar-system bodies to obtain constraints on internal structure and to derive testable predicuons Opportunities also exist f o r analysis and interpretation o f modern Earth orientation data, e g , vination in Earth rotation, polar motion, and nutation, m light o f the above mechanisms Systems Division Satellite-Systems Dynamics J H Lieske 44 40 85 01 This program consists o f studying the motions o f outer planet natural satellites to improve the knowledge o f physical and dynamical parameters describing these complex systems Physical parameters include size and shape o f these bodies, and dynamical parameters include planet and satellite masses, lower-order zonal harmonics, spin-axis orientations, rotational rates, and ephemerides Analytic theories would be used to model the motions o f these systems f o r processing classical and modern posiuonal observations Classical observations would include conventional eclipse and photographic data, while modern observations would include photoelectric, radar, and Voyager spacecraft data The program is concentrating primari ly on the Galilean satellites o f Jupiter and the major satellites o f Saturn, Uranus, and Neptune Experimental Relativity and Celestial Mechanics J D Anderson R W Hellmgs E M Standish,Jr 44 40 85.02 A considerable base o f reduced spacecraft radio range and Doppler data obtained by the NASA/JPL Deep Space Net (DSN) is available at JPL, and plans are under way to acquire additional data on fu ture missions, e g , the Galileo Orbiter at Jupiter We are interested i n proposals that either address the analysis o f a specific subset o f data or that contribute to a better understanding o f the physical models needed f o r the analysis and interpretauon o f data The emphasis at present is on (1)

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