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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 38 for “"Nanosatellite"”.
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Nanosatellite Launch Data-Logger (Sync)
<p>CubeSat designers are increasingly looking to incorporate delicate structures and optics into their payloads. These delicate payloads, however, may not survive the required absolute-worst-case launch vibration testing needed for flight certification. To help address this problem, and to better …
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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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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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Application of an electrospray thruster in a nanosatellite
Use of microelectromechanical systems (MEMS) could lead to the mass production of small (<10kg) satellites that are highly reliable and low-cost. To satisfy the satellites propulsive requirements a thruster will need to have a high specific impulse yet still be small enough to not contribute …
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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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Nonlinear optics for frequency-doubling in nanosatellite laser communication
In this work, we assess the utility of nonlinear optics for frequency-doubling to enable free space optical (FSO) communication links to take advantage of the ability to switch between two wavelengths using one transmit module. Our analysis shows that incorporating frequency-doubling with nonlinear …
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GNSS-based relative navigation for LEO nanosatellite laser communications
… of demonstrating the first Low-Earth orbit (LEO) nanosatellite crosslink. The need for precise and accurate pointing with laser instruments motivates a formalized, systematic approach to fulfilling this need called Pointing, Acquisition, and Tracking (PAT). The focus of this work is the initial …
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Nanosatellite Hyperspectral Imaging Performance Modeling for Ocean Color Detection.
… optical constituents in turbid, coastal regions. Nanosatellites hosting ocean-sensing hyperspectral imagers may offer gap-filling solutions by providing complementary measurements with high spectral, spatial, and temporal resolution that align spectrally with legacy data. This work investigates …
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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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Probabilistic methods for systems engineering with application to nanosatellite laser communications
Risk-tolerant platforms such as nanosatellites may be able to accept moderate performance uncertainty if it enables the reduction of cost or improves manufacturability, in contrast to large-budget space missions. New uncertainty-based systems engineering approaches such as uncertainty-based …
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Optomechanical design, analysis, and testing of the nanosatellite optical downlink experiment
… design, analysis, and test results of the Nanosatellite Optical Downlink Experiment (NODE). NODE is a CubeSat FSO communication system demonstration mission. The NODE payload is a hosted payload that is designed to establish and maintain optical alignment, survive launch loads, and maintain …
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Electrical Design and Testing of an Uplink Antenna for Nanosatellite Applications
Virginia Tech, Utah State University, and the University of Washington were teamed to form the Ionospheric Observation Nanosat Formation to investigate formation-flying requirements for multiple spacecraft missions. A communication subsystem for the mission will comprise an uplink, downlink and a …
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Applying the engineering systems multiple-domain matrix framework to nanosatellite space systems
The nanosatellite industry is expanding rapidly, as academic and private institutions develop new technologies for experimentation on orbit. These "CubeSats" are resource constrained, complex socio-technical systems that have complicated interdependencies across multiple domains. To improve …
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The Design and Implementation of a Nanosatellite State-of-Health Monitoring Subsystem
… consists of the design of a low-power, low-cost, nanosatellite computer system solution. The proposed system solution, and design and implementation of a multiple-bus master FPGA and health monitoring space computer subsystem are described. In the fall of 1998, the US Air Force (USAF) funded …
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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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Development of a pointing, acquisition, and tracking system for a nanosatellite laser communications module
… systems is difficult, and state of the art nanosatellite RF systems struggle to keep up with the higher demand. Laser communications (lasercom) has the potential to achieve high bandwidth with a reduction in power and size compared to RF, while simultaneously avoiding the significant …
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Propulsion performance of a microcavity discharge device
… work explores the requirements for an effective nanosatellite propulsion system. A candidate system is proposed in the form of a microcavity discharge device modified for use as an electrothermal thruster, called a MCD thruster. Development of the MCD thruster was primarily experimental in …
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Rapid On-Demand Launch Mission Planning for Timely Delivery of Spacecraft Constellations
… from an airborne launch vehicle can provide a nanosatellite overhead in under an hour anywhere in the world. On-demand launch can support capabilities already on-orbit and provide tailored or new capabilities rapidly. A military rapid on-demand launch fulfills operational requirements for …
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Developing the detectability, identifiability, and trackability analysis for the space sustainability rating
… smaller ASOs. Meanwhile, ventures in the use of nanosatellite and picosatellite architectures for commercial business models have become increasingly popular due to their lower material and launch costs. The proliferation of these small ASOs has made it easier than ever to add to the orbital …
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A CFD Investigation of Axisymmetric Microthruster Nozzles for Use on Nano-Satellites
… propellant and surroundings, destined for use in nanosatellite missions, is investigated via a numerical approach using the Wind-US flow solver. An experimental apparatus designed to measure microthruster performance in atmospheric or vacuum conditions used to aid numerical simulations is also …
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