Earth & Space Science
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GNSS-PPP Navigation in Obstructed Environments Using a Chip-Scale Atomic Clock and Clock Coasting
(2020-11-13)The Precise Point Positioning (PPP) measurement processing technique for Global Navigation Satellite Systems (GNSS) is applied widely for scientific applications that require sub-metre level accuracy with few obstructions. ... -
Analysis and Conditioning of GNSS Measurements from Smartphones for Precise Point Positioning in Realistic Environments
(2020-11-13)With the availability of raw GNSS code and carrier-phase measurements from dual-frequency chips in smartphones, Precise Point Positioning (PPP) can be used to improve the accuracy of the positioning solution offered by ... -
Exploitation of Deep Learning in the Automatic Detection of Cracks on Paved Roads
(2020-11-13)Information on the severity of pavement cracks is critical for pavement repair services. This study aimed to exploit the applications of deep learning networks to improve the detection and classification of pavement cracks. ... -
Ultra-Wideband Based UAV Positioning in GNSS Denied Environment
(2020-08-11)GNSS-IMU-based navigation has been introduced in the mid-90s and still a key component of UAV navigation. However, it has a critical drawback to operate in downtown core areas where high-rise buildings often interfere with ... -
The New Concept of GRACE Gradiometry and the Unravelling of the Mystery of Stripes
(2020-08-11)For nearly two decades, the Gravity Recovery and Climate Experiment (GRACE) and GRACE-Follow On (GRACE-FO) missions have been widely used to quantify mass transfers within the Earth. We perform analysis on the on-board ... -
Laboratory Electrical DC Resistivity of Serpentinite, Graphite, Oxide and Sulfide Minerals
(2020-08-11)Radar remote sensing and Ground Penetrating Radar (GPR) are effective techniques for geological subsurface investigations. Planetary missions, such as Apollo-17 and Change-3, have used GPR as a tool for investigating the ... -
A Comparison Study on Control Moment Gyroscope Arrays and Steering Laws
(2020-05-11)Current reaction wheels and magnetorquers for microsatellite are limited by low slew rate and heavily depends on orbital parameters for coverage area. Control moment gyroscope (CMG) clusters offer an alternative solution ... -
Evaluation and Application of Max-DOAS Methods for Monitoring Aerosols, NO2, and SO2 in Urban and Industrial Environments
(2020-05-11)The ideal measurement technique to effectively address an air quality problem depends on the chemical and physical properties of the species and its environment. Multi-Axis Differential Optical Absorption Spectroscopy ... -
Precise Point Positioning Augmentation for Various Grades of Global Navigation Satellite System Hardware
(2020-05-11)The next generation of low-cost, dual-frequency, multi-constellation GNSS receivers, boards, chips and antennas are now quickly entering the market, offering to disrupt portions of the precise GNSS positioning industry ... -
Development and Improvement of Spectroscopic Techniques for Atmospheric Composition Measurements from Ground and Space
(2020-05-11)Investigating the role of the atmosphere in climate change requires a large body of observations and measurements of atmospheric composition. This requires the development of observational techniques and instrumentation, ... -
Investigating the Capability of a New Surface-Based EM Instrument, the Sea Ice Sensor (SIS), to Measure Sea Ice Thickness
(2020-05-11)Sea ice thickness measurement is an important parameter in climate system models, safety and efficiency of offshore operations and maritime navigation. Electromagnetic (EM) induction instruments are commonly used to measure ... -
Constraints on the Aphelion Cloud Belt Phase Function with Mars Science Laboratory (MSL) and Mars Color Imager (MARCI)
(2020-05-11)We constrained the phase function of Martian water ice clouds (WICs) in the aphelion cloud belt season using data from both Mars Science Laboratory (MSL), and the Mars Color Imager (MARCI). The modeled ice crystal phase ... -
Experimental Investigation of Spacecraft Rendezvous and Docking by Development of a 3 Degree of Freedom Satellite Simulator Testbed
(2020-05-11)This thesis developed a 3 degree of freedom air bearing satellite simulator testbed. The major components of this testbed are a 2-meter by 4-meter granite table, a pair of satellite simulators, and a passive infrared marker ... -
Abstracting Cubesat Operations: A Path to Real Cubesat Interoperability
(2019-11-22)Introduction of the CubeSat form factor brought a paradigm shift in the industry. With the size becoming a standard, cost and development time were able to be reduced significantly. However, the industry has not yet fully ... -
On-Orbit Resident Space Object (RSO) Detection Using Commercial Grade Star Trackers
(2019-11-22)The resident space object (RSO) population, including both functioning satellites and on-orbit debris, has grown to the point where dedicated ground and space-based networks are needed to maintain up-to-date catalogues of ... -
Using Deep Neural Networks for Automatic Building Extraction with Boundary Regularization from Satellite Images
(2019-11-22)The building footprints from satellite images play a significant role in massive applications and many demand footprints with regularized boundaries, which are challenging to acquire. Recently, deep learning has made ... -
SAR Phase Unwrapping Using Path-Based Least-Squares Phase Estimation and Region-Growing with Polynomial-Based Phase Prediction
(2019-11-22)Differential SAR interferometry (DInSAR) has proven to be a processing approach that is well-suited to precisely identifying large-scale land deformation patterns. This is useful for many environmental monitoring applications, ... -
Multibody Dynamics and Control of Tethered Spacecraft Systems
(2019-11-22)This doctoral research conducts high-fidelity multiphysics modeling for tethered spacecraft systems, such as electrodynamic tether systems, electric solar wind sail systems, and tether transportation systems with climbers. ... -
The Distribution of Organic Material in Mars-Analogue Volcanic Rocks, as Determined with Ultraviolet Laser-Induced Fluorescence Spectroscopy
(2019-11-22)With continuous advancements in technology and space research, the priorities of scientists who study the surface of Mars have shifted from characterizing the environment to detecting signs of life. Hence, research programs ... -
Characterizing the Dielectric Properties of Geologic and Asteroid Regolith Analogue Material for Improved Planetary Radar Interpretation
(2019-11-22)Planetary radar has provided an increasingly growing number of datasets on the inner terrestrial planets and near-Earth and main-belt asteroid populations in our solar system. Physical interpretation of radar data for ...
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