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Articles 1 - 8 of 8
Full-Text Articles in Astrodynamics
Embedded State Estimation For Optimization Of Cislunar Space Domain Awareness Constellation Design, Thomas Henry Clareson
Embedded State Estimation For Optimization Of Cislunar Space Domain Awareness Constellation Design, Thomas Henry Clareson
Graduate Theses, Dissertations, and Problem Reports (ETD)
The traffic in cislunar space is expected to increase over the coming years, leading to a higher likelihood of conjunction events among active satellites, orbital debris, and non-cooperative satellites. This increase necessitates enhanced space domain awareness (SDA) capabilities that include state estimation for targets of interest. Both Earth surface-based and space-based observation platforms in geosynchronous orbit or below face challenges such as range, exclusion, and occlusion that hinder observation. Motivated by the need to place space-based observers in the cislunar space regime to overcome these challenges, this paper proposes a cislunar SDA constellation design and analysis framework that integrates state …
Probabilistic Space Weather Modeling And Forecasting For The Challenge Of Orbital Drag In Space Traffic Management, Richard J. Licata Iii
Probabilistic Space Weather Modeling And Forecasting For The Challenge Of Orbital Drag In Space Traffic Management, Richard J. Licata Iii
Graduate Theses, Dissertations, and Problem Reports (ETD)
In the modern space age, private companies are crowding the already-congested low Earth orbit (LEO) regime with small satellite mega constellations. With over 25,000 objects larger than 10 cm already in LEO, this rapid expansion is forcing us towards the enterprise on Space Traffic Management (STM). STM is an operational effort that focuses on conjunction assessment and collision avoidance between objects. While the equations of motion for objects in orbit are well-known, there are many uncertain parameters that result in the uncertainty of an object's future position. The force that the atmosphere exerts on satellite - known as drag - …
Next-Generation Re-Entry Aerothermodynamic Modeling Of Space Debris Using Machine Learning, Nicholas Sia
Next-Generation Re-Entry Aerothermodynamic Modeling Of Space Debris Using Machine Learning, Nicholas Sia
Graduate Theses, Dissertations, and Problem Reports (ETD)
The number of resident space objects re-entering the atmosphere is expected to rise with increased space activity over recent years and future projections. Predicting the survival and impact location of the medium to large sized re-entering objects becomes important as they can cause on ground casualties and damage to property. Uncertainties associated with the re-entry process makes necessary a probabilistic approach, which can be computationally expensive when using high-fidelity numerical methods for estimating aerothermodynamic properties. To date, object-oriented analysis is the dominant tool used for atmospheric re-entry modeling and simulation, where aerothermodynamic coefficients are used to determine the risk a …
Updates And Improvements To The Satellite Drag Coefficient Response Surface Modeling Toolkit, Phillip Logan Sheridan
Updates And Improvements To The Satellite Drag Coefficient Response Surface Modeling Toolkit, Phillip Logan Sheridan
Graduate Theses, Dissertations, and Problem Reports (ETD)
For satellites in Low Earth Orbit, the drag coefficient is a major area of uncertainty. Researchers at the Los Alamos National Laboratory have created a Response Surface Modeling (RSM) toolkit to provide the community with a resource for simulating and modeling satellite drag coefficients in Free Molecular Flow. The toolkit combines the high fidelity of numerical simulation techniques with the speed of regression modeling. Specifically, it uses a training sample of drag coefficients simulated with the Test Particle Monte Carlo method with the robust Gaussian Process Regression approach. The RSM toolkit is the prime process to become a toolkit of …
Space Race - Introduction, Jesse Lackey
Space Race - Introduction, Jesse Lackey
Cold War & Space Race
The infographic linked below is a timeline of events in 20th-century America related to the Cold War, the Space Race, and the Civil Rights Movement. The timeline is designed to put the events in Hidden Figures into historical context. The timeline chronologically compares groundbreaking historical events such as the Civil Rights Act of 1964 and the creation of NASA alongside the historical presence of the three women, Dorothy Vaughan, Katherine Johnson, and Mary Jackson, that the reading is focused around. The book hops around from year to year and is very difficult to follow chronologically. That is part …
Influential Women In Flight - Trading Cards, Becca Stegmann
Influential Women In Flight - Trading Cards, Becca Stegmann
Women in STEM
For this assignment, I created a collection of trading cards that provide biographies and important information about influential minority women in flight. The front of each card has basic demographic information, including each person’s name, birth date, hometown, and what they are known for. The back of each card has a slightly longer explanation of each person, followed by something they are quoted with saying and some key facts about their lives. The cards can be printed out in color and laminated for longevity if desired.
Women In Engineering, Arianna Frisina
Women In Engineering, Arianna Frisina
Women in STEM
The timeline consists of significant events of women in engineering. The years range from 1939 to 1974 and contains information from Hidden Figures and a peer-reviewed article that was found on JSTOR. The timeline shows the years that the women (Katherine Johnson, Dorothy Vaughan, Christine Darden, and Mary Jackson) began working for NACA. It also includes the time Christine Darden discovered her passion for math, when Kitty O’Brien Joyner sued the University of Virginia, the year of the Civil Rights Act, when Katherine Johnson was able to attend the editorial meetings, and Mary Jackson enrolling in engineering classes. The year …
Influential Women In Flight - Introduction, Becca Stegmann
Influential Women In Flight - Introduction, Becca Stegmann
Women in STEM
For this assignment, I created a collection of trading cards that provide biographies and important information about influential minority women in flight. The front of each card has basic demographic information, including each person’s name, birth date, hometown, and what they are known for. The back of each card has a slightly longer explanation of each person, followed by something they are quoted with saying and some key facts about their lives. The cards can be printed out in color and laminated for longevity if desired.