Earth & Space Science
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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 ... -
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, ... -
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 ... -
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 ... -
Individual Tree Crown Delineation Using Multispectral LiDAR Data
(2019-11-22)In this study, an improved treetop detection and a region-based segmentation algorithm were developed to delineate Individual Tree Crowns (ITCs) using multispectral Light Detection and Ranging (LiDAR) data. The dataset ... -
Motion Synchronization of Multiple Piezoelectric Actuators (PEAS) Using the Linear Active Disturbance Rejection Controller (LADRC)
(2019-07-02)This thesis investigates how the Linear Active Disturbance Rejection Controller (LADRC) can be used with the synchronous strategy for motion synchronization of multiple piezoelectric actuators (PEAs). Both a single PEA ... -
Optimal Image-Aided Inertial Navigation
(2019-07-02)The utilization of cameras in integrated navigation systems is among the most recent scientific research and high-tech industry development. The research is motivated by the requirement of calibrating off-the-shelf cameras ... -
Use of Geospatial Methods to Characterize Dispersion of the Emerald Ash Borer in Southern Ontario, Canada
(2019-07-02)Since the introduction of the Asian Emerald Ash Borer beetle (EAB, Agrilus planipennis) to Southern Ontario in 2002, the condition of all species of Ash trees (Fraxinus) in the province is currently at risk. In this research, ... -
Towards Multi-Channel Inversion of Electromagnetic Sea Ice Surveys
(2019-03-05)Sea ice is a crucial parameter in climate research as it plays an important role in the interaction between oceans and the atmosphere in polar regions. It is considered a climate indicator and it is critical to observe its ... -
Radiative Transfer in the Martian Environment: In-Situ Results from the MSL Curiosity Rover and Laboratory Experimentation on Martian Regolith and Crystalline Rock Analogs
(2019-03-05)Global circulation models predicted a suppressed planetary boundary layer within Gale Crater prior to the landing of the Mars Science Laboratory. Images from Mars allow the amount of suspended dust near the crater floor ... -
Mixing and Deposition in a Jack Pine Forest Canopy
(2019-03-05)To study how aerosols mix and deposit to forests, a tower was erected in a jack pine forest as part of the York Athabasca Jack Pine project. The tower is surrounded by anthropogenic pollution sources from the Alberta Oil ... -
Proportional-Derivative-Acceleration Feedback Controller Design for Single Axis Attitude Control of Rigid Spacecraft with Flexible Appendages
(2019-03-05)This study designs and analyzes a new type of controller that helps improve the performance of single axis attitude control of flexible appendages attached to a rigid spacecraft. Conventionally, PID with position feedback ... -
Dynamics and Control of Spacecraft Rendezvous By Nonlinear Model Predictive Control
(2019-03-05)This doctoral research investigates the fundamental problems in the dynamics and control of spacecraft rendezvous with a non-cooperative tumbling target. New control schemes based on nonlinear model predictive control ...
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