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 20 of 334 for “"lunar"”.
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Analysis of lunar oxygen production methods under varying lunar conditions
… of providing the needed amounts of oxygen on the lunar surface for a future human mission. Past studies are combined to provide a comprehensive look at each process and their processing requirements (for example, the mass a processing plant requires, the speed at which the oxygen could be …
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Recent lunar magnetism
The magnetization of young lunar samples (<1.5 Ga) is a mystery because common sources of magnetic fields (e.g. core dynamo and long-lived impact plasma fields) have not been present within the last 1.5 Ga. To better characterize the source of magnetization in young lunar samples, we conducted …
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Lunar farside cratering,
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1970.
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Using Lunar Apatite to Assess the Volatile Inventory of the Lunar Interior
… of volatiles (H<sub>2</sub>O, Cl, F) within lunar melt inclusions, glass beads, and the mineral apatite have challenged the previously held notion that the Moon is depleted in volatiles. As the most widespread volatile-bearing phase, apatite has been the focus of many studies aiming to …
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A Low-Lunar Orbit CubeSat Solution to Mission-Oriented Lunar Surface Imagery Requirements
… architectures for missions on and near the lunar surface, which are forecast to proliferate in the coming years. The paradigm for lunar imaging assets has historically been limited to standalone, expensive projects such as the Lunar Reconnaissance Orbiter (LRO) or its planned follow on, the …
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Lunar gravitational field estimation and the effects of mismodeling upon lunar satellite orbit prediction
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Simulated lunar igneous surface rock
Thesis (M.S.)--Michigan State University. Dept. of Geology, 1968
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Aurora: Lunar Surface Power Plant
One of NASA’s Lunar Infrastructure goals is to develop an incremental lunar power generation and distribution system that is evolvable to support continuous robotic/human operation and is capable of scaling to global power utilization and industrial power levels. Achieving this mission will require …
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Decline of the lunar dynamo
… ago (Ga). An outstanding question is when the lunar core dynamo actually ceased. The presence of unstable alternating field (AF) demagnetization behavior has hindered interpretation of the magnetic remanence present in many young lunar samples. In this thesis, I demonstrate that the lack of …
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Reusability analysis for Lunar Landers
As the world prepares to return to the lunar surface with the Artemis program, NASA recommended developing a reusable lunar lander to enable a sustainable exploration program. It is logical to think that reusing a lunar lander instead of building a new one for each mission is more cost-effective, …
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Early lunar geology and geophysics
… three important events that took place early in lunar history and have left a lasting signature. The first event is the formation of the largest basin on the Moon, the South Pole-Aitken Basin. We develop a systematic method to define the previously unknown boundaries of this degraded structure …
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The bulk lunar electrical conductivity.
Thesis. 1975. Sc.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
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Investigation of regional variation in Lunar crater morphometry from (Lunar Orbiter Laser Altimeter) LOLA observations
… advent of global Digital Elevation Models of the lunar surface, obtained from the Lunar Orbiter Laser Altimeter (LOLA), has allowed for a quantitative assessment of crater morphometry. 351 simple and complex craters in the Mare Serenitatis, far side highlands, near side highlands, and South …
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Towards a Circular Lunar Economy: Incentivizing the Design of Multi-Purpose Reusable Lunar Landers and Rovers
… a lasting presence on the Moon by 2030. However, lunar surface debris has already exceeded 200,000 kg, prompting concerns about the environmental, operational, and economic viability of future missions. This thesis proposes that circular economy principles—particularly reusability, modularity, and …
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Autonomous optical navigation for lunar missions
… measurement options for Orion autonomous optical lunar navigation are analyzed using linear covariance analysis methods. The measurements include a feature tracking camera measurement, star landmark elevation measurement, star horizon elevation measurement, and star occultation measurement. Based …
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Theory of the lunar photoelectron atmosphere
… model takes into account the illumination of the lunar surface by solar (black body) radiation and also the distribution in energy of the electrons ejected for each photon energy. An adiabatic gas model of the photoelectron atmosphere provides an independent check of the results.</p> <p>Assuming a …
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Observation and Interpretation of Lunar Occultations
Made available in DSpace on 2014-12-14T05:15:29Z (GMT). No. of bitstreams: 1 7821226.pdf: 3868653 bytes, checksum: 028df164d2ed806ddd96a9859c95a77c (MD5) Previous issue date: 1978
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The lunar tide in the atmosphere,
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1969.
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Crystallization kinetics of lunar composition 15555.
Thesis: B.S., Massachusetts Institute of Technology, Department of Metallurgy and Materials Science, 1973
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Lunar descent using sequential engine shutdown
… shutdown is introduced and its application to lunar descent is motivated. The concept calls for the utilization of multiple fixed thrust engines in place of a single continuously throttleable engine. Downrange position control is provided by properly timed engine shutdowns. The principle …
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