Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"celestial body"”.
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An Open Source, Autonomous, Vision-Based Algorithm for Hazard Detection and Avoidance for Celestial Body Landing
… Detection, and Avoidance (HDA) sub-system for celestial body landers that will enable different spacecraft to complete solar system exploration. The main objective of the HDA sub-system is to assemble a map of the local terrain during the descent of the spacecraft so that a safe landing site …
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Near-Infrared Spectroscopy of Near-Earth Asteroids: 3122 Florence, (357439) 2004 BL86, 1036 Ganymed, and 4055 Magellan
… were inconclusive. Discovering water on a celestial body such as Florence, an S-type asteroid, is highly unusual and warrants further study.
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Automatic design of the gravity-reducing propulsion system of the TALARIS Hopper Testbed
… a perceived gravity equal to the gravity of the celestial body of interest. Planetary hoppers explore planetary surfaces through hopping, i.e. low altitude and short-duration flying. Recently, these systems have gained popularity as cost-effective means for planetary exploration due to their …
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Natural and artificial orbits around the Martian moon Phobos
… missions of NASA and ESA. Phobos is a tiny celestial body that orbits around Mars at low altitude. The unique combination of these two characteristics yields the sphere of influence of the moon to be very close to its surface. Therefore, orbital dynamics around Phobos are particularly …
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On the dynamics, navigation and control of a spacecraft formation of solar concentrators in the proximity of an asteroid
… are applicable to proximal motion around a celestial body, in particular one with a non-Keplerian or irregular orbit as in the case here with the orbit being constantly altered by the deflection action and subject to perturbations, such as solar radiation pressure. Two concepts, and the …
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Interplanetary Transfer Trajectories Using the Invariant Manifolds of Halo Orbits
… space travel, the Newtonian dynamics of the two-body problem have been used to design orbital trajectories to traverse the solar system. That is, that a spacecraft orbits only one large celestial body at a time. These dynamics have produced impressive interplanetary trajectories utilizing …
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Advanced Methods for the Simulation of Radar Sounder Planetary Data
… geometry and the properties of the investigated celestial body. Consequently, simulation tools play a fundamental role throughout the entire life-cycle of a mission with a RS instrument as a payload. In the design phase, they provide a virtual environment to optimize system parameters and assess …