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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"nanosatellites"”.
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Development of Magnetometer-Based Orbit and Attitude Determination for Nanosatellites
… to a wider array of mission possibilities for nanosatellites. This research examines the feasibility of using low-cost magnetometer measurements as a method of autonomous, simultaneous orbit and attitude determination for the novel application of redundancy on nanosatellites. Extended Kalman …
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Orbital Determination Feasibility of LEO Nanosatellites Using Small Aperture Telescopes
… of imaging and orbital determination of nanosatellites is greatly improved.</p>
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A Nonlinear Magnetic Controller for Three-Axis Stability of Nanosatellites
The problem of magnetic control for three-axis stability of a spacecraft is examined. Two controllers, a proportional-derivative controller and a constant coefficient linear quadratic regulator, are applied to the system of equations describing the motion of the spacecraft. The stability of each is …
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Design, Implementation and Validation of an Attitude Determination Subsystem for Nanosatellites
… class by using low cost sensors. CubeSats are nanosatellites that complies a certain amount of layout criterions described by the California Polytechnic State University. A 3-axis attitude determination platform has been designed with emphasis on the use of low cost, off the shelf sensors. This …
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Feasibility-study for space-based transit photometry using mid-sized nanosatellites
… observations must be made from space. Mid-sized nanosatellites can provide a low-cost option for building an optical system to take these observations. The potential of using nanosatellites of varying sizes to perform transit measurements was evaluated using a theoretical noise budget, simulated …
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Development of next generation multifunctional composite structures for CubeSats, pico- and nanosatellites
L'abstract è presente nell'allegato / the abstract is in the attachment
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Batch-microfabricated miniaturized planar arrays of Langmuir probes for reentry plasma diagnostics and nanosatellites
One of the most important technical goals in spacecraft design is maintaining the vehicle's integrity under the extreme conditions encountered during reentry to the Earth's atmosphere. When a hypersonic vehicle travels through the atmosphere, a high-density and low-temperature plasma sheath forms …
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Thermal Modelling and Validation of Heat Profiles in an RF Plasma Micro-Thruster
<p>The need and demand for propulsion devices on nanosatellites has grown over the last decade due to interest in expanding nanosatellite mission abilities, such as attitude control, station-keeping, and collision avoidance. One potential micro-propulsion device suitable for nanosatellites is an …
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Development of Hardware and Efficient, Robust Control Algorithms for a Nanosatellite Reaction Control System
Nanosatellites are currently being proposed for missions which place increasingly demanding requirements on the attitude and orbit determination and control system. Traditionally, magnetic actuators are used to manage angular momentum buildup in the satellite, which is not possible in beyond-low …
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Improving nanosatellite capabilities for atmospheric sounding and characterization
… science, defense, and intelligence communities. Nanosatellites (with mass < 10 kg, such as CubeSats) can support miniaturized instruments for atmospheric sounding and characterization. Nanosatellite constellations can improve spatial and temporal coverage of Earth and can produce data consistent …
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Electrode Geometry Effects in an Electrothermal Plasma Microthruster
<p>Nanosatellites, such as Cubesats, are a rapidly growing sector of the space industry. Their popularity stems from their low development cost, short development cycle, and the widespread availability of COTS subsystems. Budget-conscious spacecraft designers are working to expand the range of …
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Calibration and validation for CubeSat Microwave Radiometers
Miniaturized microwave radiometers deployed on nanosatellites in Low Earth Orbit (LEO) are now demonstrating the ability to provide science-quality weather measurements. For instance, the Micro-sized Microwave Atmospheric Satellite-2A (MicroMAS-2A) is a 3U CubeSat launched in January 2018 that …
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Nanosatellite Probes in Interplanetary Space: An Augmented Cassini Mission
… mission.</p> <p>While the end goal is the use of nanosatellites on future interplanetary missions, this thesis focuses on an existing interplanetary mission, Cassini. The aim to demonstrate the scientific viability of this “Mother-Daughter” architecture can be achieved by locating numerous …
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Application of ion electrospray propulsion to lunar and interplanetary missions
… of lunar and interplanetary missions using nanosatellites, which can lead to substantial cost reductions. The main objective of the research presented in this thesis is to develop a guidance and control (GC) architecture for small spacecraft using iEPS modules for main propulsion and …
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Digital Sun Sensor Design for Nanosatellite Applications
… photodiode array design approach, applicable for nanosatellites and other small spacecraft is proposed. A common and well-known strategy of application of a geometrical aperture mask on the light detectors is improved upon and utilised in a non-conventional fashion in the design presented in this …
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Power conversion and scaling for vanishingly small satellites with electric propulsion
… MEMS) effectively miniaturizes propulsion for nanosatellites. Current iEPS thrusters consist of arrays of ion emitters, with a thruster for CubeSat application consisting of hundreds of emitters on a 1 cm² package. As a consequence, the lower bound on the size of satellites incorporating …
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Improving attitude determination and control of resource-constrained CubeSats using unscented Kalman filtering
CubeSats are a specific subset of nanosatellites, and their common form factor and canisterized deployers have made it possible to undertake higher risk, lower cost missions that can supplement the current generation of large, monolithic, expensive satellites. Our objective in this thesis is to …
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Design, Analysis, Fabrication, and Testing of a Nanosatellite Structure
… missions that once required super-satellites. Nanosatellites form one group of these high risk/low cost spacecraft. The Virginia Tech Ionospheric Scintillation Measurement Mission, known as HokieSat, is a 40 lb nanosatellite being designed and built by graduate and undergraduate students. The …
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Development of a pointing, acquisition, and tracking system for a nanosatellite laser communications module
… meet the size, weight, and power constraints for nanosatellites. The Nanosatellite Optical Downlink Experiment (NODE) developed at MIT is designed to achieve a lasercom downlink of 10 to 100 Mbps within the constraints of a typical 3-U CubeSat. This thesis focuses on the development of the …
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Sustainable for All? How Satellite Remote Sensing Contributes to Sustainable Development in Africa and International Climate Policy
… agencies through 2021. Small satellites, and nanosatellites in particular, have featured as many new entrant nations’ debut satellites due to their modularity and utility. Room for improvements exist in increasing data usage and availability from successful missions, particularly with the new …
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