Master's Projects

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Master's Projects

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Now showing 1 - 10 of 266

Space Object Detection in Images Using Matched Filter Bank and Bayesian Update

(Georgia Institute of Technology, 2015-12-11) Murphy, Timothy S.

Electro-optical sensors, when used to track space objects, are often used to produce detections for some orbit determination scheme. Instead, this paper proposes a series of methods to use electro-optical images directly in orbit determination. This work uses the SNR optimal image filter, called a matched filter, to search for partially known space objects. By defining a metric for measuring matched filter template similarity, a bank of matched filters is efficiently defined by partitioning the prior knowledge set. Once partitioned sets are known, the matched filter bank can be localized to regions of the sky. A method for hypothesis testing the result of a matched filter for a space object is developed. Finally, a framework for orbit determination based on the matched filter result is developed. Simulation shows that the analytic results enable a better framework for implementing matched filters for low SNR object detection
Multi-Objective CubeSat Constellation Optimization for Space Situational Awareness

(Georgia Institute of Technology, 2015-12-01) Snow, Adam C.

The proliferation of on-orbit debris has motivated much of the recent space situ ational awareness (SSA) missions and related research. Space-based missions are typically carried out by large spacecraft, yet the emerging and improving technol ogy for CubeSat class satellites offers a potential new platform for SSA. This paper presents the graduate Special Problem effort to develop explore the optimization of a CubeSat constellation for SSA. This optimization approach considers two ob jectives: to maximize the number of daily unique detections while minimizing the lifecycle cost of a constellation. The epsilon constraint method is used to devel op the Pareto Frontier with a genetic algorithm as the single-objective optimizer. This work was prepared as part of a larger effort for the Journal of Spacecraft and Rockets, and the supporting material is included.
Activate Atlanta: Reignite East Point

(Georgia Institute of Technology, 2015-12) Bonn, Sarah Jane ; Collot, Adeline ; Li, Mingyang ; McMullen, Meghan ; Pringle, Jeshua ; Reeves, Blake ; Wu, Yihan

The Planning Studio from Georgia Institute of Technology’s School of City and Regional Planning program conducted a twelve-week studio on several portions of the MARTA Red Line Corridor in Atlanta. The intent of the studio was to examine equitable transit oriented developments, which are a mix of uses within a walkable radius of a transit stop. Various groups were formed to address different MARTA stations or segments of the corridor. The scope of this document address the East Point MARTA station and surrounding downtown area. Concluding recommendations were formed based on research in transportation, development and urban form, placemaking, and economic development.
University - Community Partnerships for Workforce Development

(Georgia Institute of Technology, 2015-12) Albert, Austin ; Blaut, Avrahim ; Bourget, Jean-Pierre ; Kao, Mindy ; Snyder Kelly, Anna ; Reasoner, Jane ; Samarripas, Stefen ; Tatum, Kimberly ; Welch, Anne ; Kim, Anna Joo

Visitors to Georgia Tech need only to walk a few minutes’ distance from campus to find the Westside community, but they will feel like they’re in a different world. Though the area has made a significant cultural contribution to Atlanta, in recent years severe disinvestment has led to high unemployment, high crime rates, low educational attainment, and other problems in the community. While its neighbor to the east, Georgia Tech, has grown and thrived, the Westside has been left behind. Many residents lack even basic computer access, for example, making it even more difficult to find work. This is the situation at the doorstep of an internationally recognized research university; but we don’t have to accept it. This report proposes two areas of focus for Georgia Tech to take action for the Westside: 1. A community RFP program to leverage academic resources for neighboring community projects. 2. Westside-supportive policies in institutional procurement, hiring, and diversity. These recommendations are preliminary, but have been designed with simple and quick implementation in mind.
Atlanta University Center: Neighborhood Study

(Georgia Institute of Technology, 2015-12) Boyd, Joseph ; Lueders, Abram ; Maines, Kat ; Riddell, Briana

The following report was produced as a part of Georgia Tech’s Red Line Corridor planning studio. Initially, the goal of this studio was to explore the possibility of transit-oriented development (TOD) in underserved communities along the southern portion of MARTA’s Red Line. However, the scope of the studio was expanded to include communities on Atlanta’s Westside that have also been subject to severe disinvestment. At the end of a selection process, four areas were selected for in-depth study and planning: English Avenue, Atlanta University Center, Fort McPherson / Lee Street, and East Point, GA. While each of these areas has a unique history and set of needs, they also share common challenges. These challenges include a lack of connectivity, and low levels of both private and public investment. But these challenges are only a part of the story. The goal of this studio isn’t to simply point out what’s wrong with the studied communities --it’s to point out what’s right, and to leverage these strengths to overcome any weaknesses that may exist.
Imagine Our Norcross: Planning for immigrant Integration

(Georgia Institute of Technology, 2015-12) Kim, Anna Joo ; O’Connell, Katie ; Doyle, Jessica ; Wilson, Kate ; Plante, Jessica ; Bowman, Ryan ; Shields, Madi ; Chang, Eileen ; Byars, Kristin ; Schleicher, John Eric ; Coursey, Nathan

In the spring of 2015, a group of researchers from Georgia Tech’s School of City and Regional Planning created a studio project to collect information about the immigrant populations living and doing business in the city of Norcross, Georgia, as well as the unincorporated parts of the Gwinnett Village Community Improvement District (CID). The goal of the studio was to provide the city of Norcross and the Gwinnett Village CID with two sets of information: one, a portrait of the overall immigrant community—how and where people lived; where they worked; where they played, argued, shopped, and prayed—and two, what this community would need in order to become more engaged in the area’s civic and economic life.
Use of Uninformative Priors to Initialize State Estimation for Dynamical Systems

(Georgia Institute of Technology, 2015-12-01) Worthy, Johnny L., III

The admissible region must be expressed probabilistically in order to be used in Bayesian estimation schemes. When treated as a probability density function (PDF), a uniform admissible region can be shown to have non uniform probability density after a transformation. This paper uses the fundamental multivariate probability transformation theorem to show that regardless of which state space an admissible region is expressed in, the probability density must remain uniform. The admissible region is shown to be a special case of the Jeffreys’ prior, an uninformative prior with a probability density that remains constant under reparameterization. This paper introduces requirements on how these uninformative priors may be transformed and used for state estimation.
Control Cost and Mahalanobis Distance Binary Hypothesis Testing for Spacecraft Maneuver Detection

(Georgia Institute of Technology, 2015-11-12) Jaunzemis, Adris D.

An anomaly hypothesis testing technique using the minimum-fuel control distance metric is extended to incorporate non-Gaussian boundary condition uncertainties and employ binary hypothesis testing. The adjusted control distance metric utilizes Gaussian mixtures to model non-Gaussian boundary conditions, and binary hypothesis testing allows inclusion of anomaly detection thresholds and allow able error rates. An analogous framework accommodating Gaussian mixtures and binary hypothesis testing is developed. Both algorithms are compared using simulated and empirical satellite maneu ver data. The North-South station-keeping scenario shows control distance to be less sensitive with increased uncertainty than Mahalanobis distance but more consistent with respect to observation gap duration, a trend which is corroborated using available real-world data. The same consistency with respect to observation gap is observed in East-West station-keeping while also showing control distance metric to be more sensitive for shorter observation gaps. In the non-Gaussian boundary con dition case, control distance outperforms Mahalanobis distance in both detection and computational complexity.
Activity-Based Parks Typology: A Strategy for Addressing the Parks and Recreation Needs of Residents in an Urban Environment

(Georgia Institute of Technology, 2015-08) Perez-Carro, Carlos F.

Park systems across the United States have historically been organized and planned around a typology of parks. Underlying this traditional parks typology is a land intensive approach to providing parks and recreation services. While this approach may be helpful in planning and expanding parks systems in areas where land is inexpensive and readily available, it is not as useful in urban areas where land is at a premium and typically very costly. This research paper explores the use of an ‘activity-based’ parks typology to plan for parks and recreation services. Specifically, this research paper answers the questions of what is an activity-based parks typology? What does an activity-based park typology mean for how cities and Parks and Recreation Departments plan and deliver parks and recreation services? What are the spatial requirements of an activity-based parks typology? What are potential planning and design implications of an activity-based parks typology?
Progress and Service: Building Partnership Between Georgia Tech and West Atlanta

(Georgia Institute of Technology, 2015-08) O'Connell, Katie

The Westside of Atlanta is a series of vibrant, his-torical neighborhoods that sits adjacent to the Georgia Institute of Technology. Policy decisions from the local to the federal level have negatively impacted the community and created an area of high joblessness, home vacancies, and low educa-tional attainment. As a leader, financial power-house, and a good neighbor, it is recommended that Georgia Tech commit to partnering with the community to find solutions to these systemic problems. By looking at the examples proposed by other institutions of higher learning, Georgia Tech can create a solid plan of action.