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.
Results
Showing 1 to 20 of 97 for “"Deep Space"”.
-
Modulation and coding for deep space probes.
Thesis: B.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1965
-
Miniaturization methodology applied to deep space microspacecraft
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
-
Reducing human radiation risks on deep space missions
… exposure on a mission to Mars to below the NASA space worker limits, while concurrently minimizing launch weight, costs, and risks. All alternatives are compared via a combination of existing trade studies and swing matrices. Using these tools, it is determined that boronated nitride nanotubes …
-
Scenario-based uncertainty quantification for deep space optical communications
This thesis develops a framework for evaluating deep space communication architectures under uncertainty and explores the potential of optical communications to meet the future data requirements of deep space science missions. Currently, the Deep Space Network (DSN) relies solely on radiofrequency …
-
The design of a deep space transponder regenerative ranging unit
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1995.
-
Deep-Space Exploration Enabled by CubeSats with Staged Electrospray Propulsion
… and a capable tool for scientific missions. Deep-space CubeSats have been limited to rideshare launches thus far, acting as companions to enhance large missions or using propulsion to reach science orbits near the destination of the primary mission (e.g. to Mars or around the Moon). More …
-
The Design of Daylight Transporting Systems for Deep Space Illumination
Daylight penetration into a deep interior space can be achieved by using a light tube strategy. This research investigates how effective a room's ceiling cavity can be as a daylight transporting system. The design, therefore, tries to answer the question "What is the optimal geometry for a ceiling …
-
A mathematical model for the detection of deep space objects
The problem of detecting deep space objects with certain probabilities was investigated. A mathematical model was then developed from given problem specifications that deals with the trade-off of various parameters involved in the detection problem. A software package that allows the user to input …
-
Dynamic Code Selection Method for Content Transfer in Deep Space Network
Space communications feature large round-trip time delays (for example, between 6.5 and 44 minutes for Mars to Earth and return, depending on the actual distance between the two planets) and highly variable data error rates, for example, bit error rate (BER) of 10−5 is very comand even higher BERs …
-
Exploring the Concept of a Deep Space Solar-Powered Small Spacecraft
… Voyager 1 & 2, and Pioneer 10 & 11 are the only spacecraft to ever venture past Pluto and provide information about space at those large distances. These spacecraft were very expensive and primarily designed to study planets during gravitational assist maneuvers. They were not designed to explore …
-
Operational Scheduling of Deep Space Radars for Resident Space Object Surveillance
As space becomes increasingly congested and contested, new capabilities of rivals to threaten vital assets and exploit the area for military advantages make it more important than ever for the United States to proficiently track and monitor space traffic and debris. However, currently the system of …
-
Utilizing Permanent On-Board Water Storage for Efficient Deep Space Radiation Shielding
<p>As space technologies continue to develop rapidly, there is a common desire to launch astronauts beyond the ISS to return to the Moon and put human footsteps on Mars. One of the largest hurdles that still needs to be addressed is the protection of astronauts from the radiation environment seen …
-
A compact high-energy particle detector for low-cost deep space missions
… unobtainable, creating opportunities for new deep-space high-energy particle missions. Consequently, a new compact instrument was developed capable of detecting gamma rays, neutrons and charged particles. This instrument combines the latest in FPGA System-on-Chip technology as the central …
-
Robust Spacecraft Autonomy for Deep Space Exploration in Special Euclidean Group SE(3)
… gained extensive experience conducting manned spaceflight near Earth. Arguably, "near Earth" could even include the Moon — the most distant destination humans have reached. However, "near" in this work primarily refers low Earth orbit (LEO). One could argue that we have not truly left Earth …
-
The psychasthenia of deep space: evaluating the ‘reassertion of space in critical social theory’
The aim of this work is to question the notion of space that underlies the claimed ‘spatial turn’ in geographical and social theory. Section 1 examines this theoretical literature, drawing heavily on Soja as the self declared taxonomist of the genre, and also seeks parallels with more populist …
-
System level dispersion analysis examining program benefits to a low-thrust interplanetary CubeSat from autonomous guidance and navigation
Ground based measurements through the Deep Space Network (DSN) are unlikely to be available as often for CubeSats as for prior deep space programs because higher priority missions will take precedence for access to the limited and expensive DSN resource. Consequently, to make the most of CubeSats …
-
Linear covariance analysis trade study of autonomous navigation schemes for cislunar missions
Deep space missions to the Moon and Mars under NASA's Constellation Program are a tangible goal. However, the Deep Space Network (DSN) antennas which provided ground based navigation state updates to spacecraft of the Apollo era are aging and overtaxed. The over-reliance on this ground based system …
-
Satellite Reorientation Using Reinforcement Learning Under Unknown Attitude Failure
… approach for reestablishing communication with deep-space satellites under unknown attitude determination and control system (ADCS) failures. When traditional fault-tolerant control methods cannot restore signal, the proposed RL controller acts as a last-resort measure by autonomously …
-
Design of a cusped field plasma thruster
A plasma space propulsion thruster has been designed. It is classified as a Cusped Field Thruster (CFT), which refers to the geometry of the magnetic field that influences the flow of electrons and ions. The thruster was modeled after an original Diverging Cusped Field Thruster (DCFT) developed at …
-
MICROGRAVITY NEGATIVELY AFFECTS DNA DAMAGE REPAIR AND THE ANTI-LEUKEMIC FUNCTION OF HUMAN NATURAL KILLER CELLS
Future manned deep space missions will expose astronauts to galactic cosmic ray (GCR) radiation and solar energetic particles (SEPs) not present on Earth. The hematopoietic system constitutes one of the most radiosensitive tissues of the body and leukemias represent one of the most frequent …
Page 1 of 5