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 8 of 8 for “"Aerobraking"”.
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Autonomous guidance and decision-making for planetary aerobraking
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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An Optimization Method for the Preliminary Design of Interplanetary Aerobraking Missions (Spacecraft, Orbit Mechanics)
… spacecraft orbits, a concept referred to as aerobraking, can significantly increase the useful payload mass fraction for various types of missions. A procedure is devised which determines the optimal combination of aerobrake shielding area and initial orbit period to maximize the spacecraft …
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Approximate heat-transfer and wall-temperature calculations for aeroassisted orbital transfer vehicles
… flowfield solutions are obtained about the aerobraking shield on the AOTVs using axisymmetric Euler's equations. The flowfield solutions are coupled with laminar and turbulent boundary-layer equations and the heat-shield material properties to obtain convective heating rates and heat-shield …
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Enhancing the science return of Mars missions via sample preparation, robotic surface exploration and in orbit fuel production
… to Mars. PPIMO uses the concept of regenerative aerobraking to produce fuel in-situ. The SPAT model shows that warm redundancy improves productivity by both reducing risk and removing sample throughput bottlenecks. A method is presented for determining the economy of scale the shared preparation …
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Study of the Martian upper atmosphere using radio tracking data
… near 100 -- 110 km, are obtained from the aerobraking phase of the Mars Odyssey spacecraft; we obtain periapsis density estimates consistent with the Accelerometer Team, and estimate scale heights representative of the drag environment from an operational point of view. The orbit of Mars …
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Vertically Propagating Tides in the Martian Atmosphere
… the Mars Global Surveyor mission (MGS). The MGS aerobraking densities revealed large-amplitude large-scale wavenumber-2 signature attributed to a class of tides known as nonmigrating tides. Recent observations from the Mars Atmosphere and Volatile Evolution mission (MAVEN) suggest that tides …
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Generalized multi-commodity network flows : case studies in space logistics and complex infrastructure systems
… preferred to nuclear thermal rocket (NTR), the aerobraking option as well as ISRU availability on the Moon make great contributions in reducing the total mass to be launched from Earth, and as the ISRU production rate decreases, ISRU in each location becomes worthless at a certain threshold and …
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Analysis of Transfer Trajectories Utilizing Sequential Saturn-Titan Aerocaptures
This thesis aims to investigate the potential of a transfer orbit using successive aerocaptures at Saturn and Titan to establish a science orbit around Titan. Titan is an Earth-like moon with a dense atmosphere and organic compounds present. It has many similarities with Earth that are useful to …