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Small-satellite propulsion system modelling and simulation of orbital navigation determination; A feasibility study

Zhang, L.; Anvar, A.
Fonte: The Modelling and Simulation Society of Australia and NZ; Australia Publicador: The Modelling and Simulation Society of Australia and NZ; Australia
Tipo: Conference paper
Publicado em //2011 EN
Relevância na Pesquisa
27.95%
The size and weight of Satellites are currently being miniaturised in order to meet the purpose of lowering cost and saving production time. For this situation, a type of Small-Satellite known as the CubeSat has been identified. This kind of small-satellite is 10 cm3 cube of less than 1.33kg. Due to its limitations on overall mass and dimensions, the CubeSat uses nanotechnology components for the interior design. Therefore, an appropriate design is a crucial aspect of any CubeSat project. According to space vehicle research and development criteria, the simulation and modelling of the subsystems of CubeSat is both significant and necessary. This paper investigates a feasibility study and demonstrates the simulation of Small-Satellite orbital navigation determination and Propulsion system modelling.; Lize Zhang and Amir Anvar

Structural design of a NPS CubeSat launcher

Rossberg, Felix
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Relatório
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To encourage student interest in space and education Stanford University and CalPoly developed the CubeSat. These picosatellites weigh about one kg and can be developed and built by students. NPS is designing CubeSats and a structure to deploy them in orbit as part of its emphasis on hands-on education This technical report deals with the development of a CubeSat Launcher (NPSCuL). NPSCuL will carry up to ten P-PODs built and flight qualified by CalPoly. It will be launched into orbit and deploy multiple CubeSats. Several designs have been developed including finite element models each with a variable number of elements and shell wall thicknesses and tested to loads of 15 g. The simulation results show that the aluminum structures need to have a minimum shell thickness of 15 mm to handle the maximum expected stress. Different bolt patterns for the connection between the structure and the base plate were analyzed. A circular bolt pattern is preferred because the stress is distributed more evenly over the bolts but the shell thickness was modified based on the results from the frequency analysis.

Simulation of the deployment and orbit operations of the NPS-SCAT CubeSat

Rossberg, Felix
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Relatório
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To encourage student interest in-space education, Stanford and Cal Poly conceptualized a CubeSat in 1999. This standardized picosatellite has a cubic shape of 10 cm and weighs about one kilogram. NPS is now designing CubeSats and a structure to deploy them in-orbit as part of its emphasis on hands-on education. This technical report deals with the simulation of the deployment and orbit operations of the NPSSCAT CubeSat. With the help of the AGI Satellite Tool Kit software, animations are created that show the full mission of the CubeSat beginning with the launch and the deployment from the NPS CubeSat Launcher. The animations are combined into one movie, which can be used to visualize the project more easily and clearly. In addition to the animations, on-orbit systems operations such as power and communication profiles are analyzed. A MATLAB program uses the calculated data to generate the battery state of charge, so it can be determined whether the solar cells are producing enough power for the satellite. For the chosen reference mission, the results of the orbital lifetime calculation show that this CubeSat would only stay in orbit for about six months.

NPS CubeSat Launcher program management

Hicks, Christina M.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
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Approved for public release, distribution unlimited; The purpose of this thesis is to document my activities related to managing the design, analysis, construction, testing, and integration of a qualification and, possibly, a flight article in support of the NPS CubeSat Launcher (NPSCuL) project. This thesis will describe the process, experience, and results of managing the NPSCuL program, including the program budget and schedule in support of a flight opportunity as early as August 2010. NPSCuL is designed to utilize excess capacity on U.S. launch vehicles to place a significant volume of CubeSats into orbit in a single launch. The NPSCuL will be a secondary payload attached to the launch vehicle via the EELV Secondary Payload Adapter (ESPA) or other compatible launch vehicle structures. The NPSCuL-Lite, a modified version of the NPSCuL, integrates eight Poly-Picosatellite Orbital Deployers (P-PODs) with a deployment sequencer in a simple structure. NPSCuL-Lite will be able to accommodate up to twenty-four units of CubeSat volume. The goal of the NPSCuL project is to improve CubeSat access to space, advance U.S. space technology, and ensure that the next generation of U.S. space professionals will remain on the cutting edge of very small satellite development.

Integration and environmental qualification testing of spaecraft structures in support of the Naval Postgraduate School CubeSat launcher program

DeJesus, Adam C.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Relevância na Pesquisa
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Approved for public release, distribution unlimited; The purpose of this thesis is to document the process of designing, constructing, and testing a qualification article in support of the NPS CubeSat Launcher (NPSCuL) project, in the NPSCuL-Lite configuration. NPSCuL-Lite is designed to launch a significant volume of CubeSats into orbit in a single launch. The NPSCuL-Lite will be a secondary payload on U.S. launch vehicles, and will be attached to the launch vehicle via the EELV Secondary Payload Adapter (ESPA), the Atlas-Centaur Aft Bulkhead Carrier (ABC), or other ESPAcompatible launch vehicle interfaces. NPSCuL-Lite will host CubeSats in up to eight Poly Picosatellite Orbital Deployers (P-PODs) developed by the California Polytechnic State University (Cal-Poly). To meet launch requirements, the designer must prove that NPSCuL-Lite and its subsystems (the P-PODs and CubeSats) will operate properly in space, and will not interfere with the launch vehicle, the primary payload, or other secondary payloads. To this end, qualification testing will ensure NPSCuL-Lite can survive ground transport, launch, and CubeSat deployment. Additionally, the initial development of procedures and equipment necessary for ground handling and launch vehicle integration are addressed.

NPS CubeSat launcher design, process and requirements

Crook, Matthew R.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Relevância na Pesquisa
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Approved for public release, distribution unlimited; Access to space has always been a challenge, especially for organizations with limited budgets. In the last decade a group of universities has overcome many of the obstacles associated with placing experiments on orbit by using a nano-satellite standard called the "CubeSat." In addition to universities many private, commercial, and government organizations are now coming to appreciate the advantages of the CubeSat standard resulting in rapid growth in the CubeSat development community. Although the CubeSat standard has helped increase access to space, the number of CubeSat launch opportunities has not increased at a rate necessary to meet demand since the hardware and processes necessary to do so do not exist. U.S. based CubeSat developers face additional challenges since almost all CubeSats are launched overseas.This thesis proposes a solution to the lack of CubeSat launch availability called the NPS CubeSat Launcher (NPSCuL).The NPSCuL is a high capacity CubeSat launch mechanism, which could facilitate rideshare opportunities onboard U.S. launch vehicles. This thesis studies the design, program management, and advantages associated with such a device, and promote its development at the Naval Postgraduate School.

Electrical power subsystem integration and test for the NPS solar cell array tester CubeSat

Fletcher James Martin.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Relevância na Pesquisa
27.62%
The electrical power subsystem is one of the most important elements of any satellite. This system must provide the necessary power to enable the payload and other subsystems to perform their functions. Once spacecraft requirements are determined and an electrical power subsystem is chosen; extensive testing is required to ensure power subsystem performance. Testing of CubeSat Kit compatible power systems is especially difficult due to the inaccessibility of test points. This thesis concerns itself with the role that power and, in particular, power budgets play in very small satellites. As a practical application to facilitate power budget analysis of CubeSat Kit compatible CubeSats, a testing platform has been designed and built. Data from NPS-SCAT electrical power subsystem and other subsystems have been measured and the NPS-SCAT power budget analyzed and simulated.

Enhancing space situational awareness using a 3U CubeSat with optical imager

Flanagan, Jason A.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Relevância na Pesquisa
27.62%
Space situational awareness is extremely important in order to maintain the safety and usability of earth-orbiting satellites, as well as protecting astronauts living and working in space. Traditional space situational awareness is achieved using ground-based radar and optical sensors. This thesis explores the feasibility of space-based space situational awareness using a 3U CubeSat with an optical imager to augment the Space Surveillance Network by capturing conjunctions in space, from which ephemeris data of earth orbiting objects can be updated to more accurately predict future orbital positions. Work completed includes preliminary work towards building, testing, and using a Colony II Bus emulator and interface mechanism, allowing smooth payload and bus integration. Analysis of orbital trajectories for a reference orbit and potential crossing satellites provides insight into the capabilities of the SSA CubeSat. Future work is discussed.

STARE CubeSat Communications Testing, Simulation and Analysis

Le Gaux, Clyde R.,III
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado
Relevância na Pesquisa
27.82%
The Space-based Telescope for the Actionable Refinement of Ephemeris (STARE) CubeSat will play an important role in contributing to this nations space situational awareness (SSA), perhaps one day becoming an integral part of the space surveillance network (SSN) to track orbital debris and satellites, both active and inactive. STARE is a pathfinder mission that is expected to show that CubeSat assets can improve the accuracy of space debris ephemeris data and help national assets avoid conjunction. However, STARE cannot do its job if it cannot communicate effectively with the ground architecture. Knowing the functionality of the on board radio is essential to knowing the capabilities and limitations of the spacecraft. STARE is designed to communicate with the Mobile CubeSat Command and Control (MC3) ground station at the Naval Postgraduate School for data collection and analysis. This thesis shows testing and results, analysis and simulation of the STARE radio and the MC3 ground stations.

NPS CubeSat Prepares to See Space By Way of New Payload Platform

Naval Postgraduate School Public Affairs Office
Fonte: Naval Postgraduate School Publicador: Naval Postgraduate School
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After a recent successful test run, two exciting NPS projects are scheduled to head to space in August of this year … one is a CubeSat, a small satellite destined for Low Earth Orbit, and the other, the NPS CubeSat Launcher or NPSCuL, is the payload platform that will carry it there.

Coach Class to Orbit: the NPS CubeSat Launcher

Hicks, Christina; DeJesus, Adam; Harris, Anthony; Crook, Matt; Rossberg, Felix; Sakoda, Daniel; Panholzer, Rudolf; Newman, James
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Relevância na Pesquisa
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Publication: AIAA/USU Conference on Small Satellites; Session X: The Smaller Elements; To meet the challenge of improving CubeSat access to space, a team of graduate students at the Naval Postgraduate School (NPS) is developing the NPS CubeSat Launcher (NPSCuL). NPSCuL is an enabling technology that seeks to utilize excess capacity on US launch vehicles to provide CubeSat developers with routine, high capacity, low-cost access to space. The launcher currently integrates eight Cal Poly Poly-Picosatellite Orbital Deployers (P-PODs) with a deployment sequencer in a simple structure. NPSCuL will be able to accommodate up to twenty four units of CubeSat volume on a single launch using only one ESPA-class payload interface. This capability has the potential to advance US space technology and ensure that the next generation of US space professionals will remain on the cutting edge of very small satellite development. A flight-qualified NPSCuL is expected to be complete in late 2009 with a potential launch as early as August of 2010. NPSCuL provides “coach-class-to-orbit:” a high-capacity, low-cost way to deliver CubeSats to space that is consistent with US launch capability, the CubeSat specification, the needs of the growing CubeSat community...

CubeSat Launchers, ESPA-rings, and Education at the Naval Postgraduate School

Newman, James; Sakoda, Daniel; Panholzer, Rudolf
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
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Publication: AIAA/USU Conference on Small Satellites; Technical Session III: Launch & Propulsion Systems, Presentation Slides; An effort is underway at the Naval Postgraduate School (NPS) to leverage its unique position as both a military research institution and a graduate university interested in educational outreach. We are working to simultaneously incorporate the use of CubeSats into our educational and space research program and to enable the access of other student-built CubeSats to DoD launches. To launch CubeSats, NPS is designing a CubeSat launcher compatible with the ESPA (EELV Secondary Payload Adaptor) interface. Through partnerships with universities and other DoD collaborators, NPS is seeking to maximize the potential for launching CubeSat payloads.

The Naval Postgraduate School SCAT++ CubeSat Program

Ortiona, Christopher; Jenkins, Robert; Malone, Christopher; Dorn, Lawrence; Schroer, Matthew; et al.
Fonte: Escola de Pós-Graduação Naval Publicador: Escola de Pós-Graduação Naval
Relevância na Pesquisa
27.82%
Publication: AIAA/USU Conference on Small Satellites; Session XII: The Next Generation; The Naval Postgraduate School (NPS) Small Satellite program provides graduate students with hands-on experience designing, building, and operating satellites. NPS’s first satellite, Petite Amateur Navy Satellite (PANSAT) was deployed through the NASA Hitchhiker program on board STS-9 5 on October 29 , 19 9 8 and operated for several years. As a follow-on project to PANSAT, NPS plans to launch the Spacecraft Architecture and Technology Demonstration Satellite 1 (NPSAT1) sometime in the future. Currently the NPS Small Satellite program is evolving to include CubeSats to further enhance the educational and research opportunities at NPS. As ongoing university, government, and commercial satellite programs are showing, the CubeSat standard is proving to be a unique platform for focused research objectives and engineering design innovation. The first CubeSat to be developed at NPS is called the NPS Solar Cell Array Tester (NPS-SCAT). The overall goal of the project is to gain experience in all phases of CubeSat construction, deployment, and operations by implementing just one of NPSAT1’s many experiments: a solar cell tester. The program is creating a baseline subsystem design for future NPS CubeSats...

Mobile CubeSat Command and Control (MC3) 3-meter dish calibration and capabilities

Alcaide, Sarah M.
Fonte: Monterey, California: Naval Postgraduate School Publicador: Monterey, California: Naval Postgraduate School
Tipo: Tese de Doutorado
Relevância na Pesquisa
27.62%
Approved for public release; distribution is unlimited; The Mobile CubeSat Command and Control (MC3) architecture is a growing network of ground stations that spans the United States of America. It was designed to support the National Reconnaissance Office’s Experimental CubeSat Program. Each node was originally designed to communicate via UHF and S-band frequencies using Yagi antenna only. The MC3 ground station at the Naval Postgraduate School has recently incorporated a 3-meter S-band dish. This thesis documents the calibration and capabilities of the new S-band dish. It also investigates the possibility of using the antenna outside of its normal operating range. In particular, the idea of using an S-band, 3-meter dish to receive UHF band signals was tested by designing a UHF signal feed optimized for 915 MHz and used to listen to a UHF source deployed on a high altitude balloon at near orbital distances. In addition, this document discusses the integration of a dish system into current and future MC3 ground stations.

NPS Solar Cell Array Tester CubeSat flight testing and integration

Helker, Joseph K.
Fonte: Monterey, California: Naval Postgraduate School Publicador: Monterey, California: Naval Postgraduate School
Tipo: Tese de Doutorado
Relevância na Pesquisa
27.62%
Approved for public release; distribution is unlimited; The Naval Postgraduate School Solar Cell Array Tester (NPS-SCAT) is the first CubeSat for the Naval Postgraduate School (NPS). The NPS-SCAT mission was designed to measure solar cell performance degradation in low earth orbit. NPS-SCAT serves as a pathfinder for future NPS CubeSat missions. This thesis documents the pre-flight NPS-SCAT battery analysis, power budget, vibration analysis, beacon antenna integration evaluation, and conformal coat study. Some data from the flight is presented, which validates the pre-flight power budget analysis.

UHF-VHF Cubesat Antennas Design

Aparicio Jim??nez, Teresa Luc??a
Fonte: Universidade de Granada Publicador: Universidade de Granada
Tipo: Trabalho de Conclusão de Curso
ENG
Relevância na Pesquisa
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The main objective of this Thesis is to understand the antennas used in Cubesats (a satellite type becoming very popular among universities for teaching their students space related skills while improving their background) and to develop a prototype for future development in the GranaSAT mission. This Thesis aims to be a future reference for students developing Cubesat antennas for GranaSAT. For start, a brief introduction on antenna theory will be made for readability purposes, introducing all the terms and the fundamental parameters necessary for understanding the Thesis like scattering parameters, standing wave ratio, input impedance of an antenna, an analysis of the radiation pattern , directivity, polarization and a brief analysis on considerations for space communications. In space communications it is fundamental to achieve circular polarization because of the effect of the ionosphere in the electromagnetic waves. The strong electric charge can change the polarization in a way that is impossible to predict, so at the ground station it is mandatory to have a circular polarized antenna. After this introduction on antenna matters, an analysis of the solutions used in the previous mission will be developed, specially considering different approaches...

NPS-SCAT : Systems Engineering and payload subsystem design, integration, and testing of NPS' first CubeSat

Jenkins, Robert Donald
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xxiv, 164 p. : col. ill.
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Approved for public release; distribution is unlimited; The Naval Postgraduate School's first CubeSat, the NPS Solar Cell Array Tester (NPS-SCAT), demonstrates the capability of the CubeSat form factor as a technology test bed by implementing a single experiment--a solar cell tester. The need to validate solar cell performance on orbit, in the harsh space environment, is recurring with the continued development of advanced, untested solar cells. By using a relatively inexpensive platform, the CubeSat, such solar cells can be tested and the risk for larger satellites mitigated with this experiment. This thesis discusses the design and construction process of the solar cell array tester payload along with its integration with the remaining satellite subsystems (command and data handling subsystem, communications subsystem, and electrical power subsystem) including the problems encountered along the way and the chosen solutions. In addition, the systems engineering and testing procedures developed for and conducted on the satellite engineering design unit will be described in detail.; US Navy (USN) author

Space situational awareness CubeSat concept of operations

O'Brien, Tolulope E.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Formato: xviii, 67 p. : ill. (chiefly col.), col. maps. ; 28 cm.
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The concept of space situational awareness (SSA) is important to preserve manned and unmanned space operations. Traditionally, ground based radar, electro-optical sensors and very limited space-based assets have been used as part of the space surveillance network (SSN) to track orbital debris, inactive and active satellites alike. With the current SSN assets aging and the need for SSA growing, it is important to explore new ways to ensure proper SSA is maintained to preserve space operations. The Space-based Telescope for the Actionable Refinement of Ephemeris (STARE) project was initiated to explore the potential for a cube satellite (CubeSat) to contribute to the current SSN, with an optical payload integrated into a 3U Colony II Bus. The bus and payload data from the CubeSat will be collected by the Naval Postgraduate School Mobile CubeSat Command and Control ground station. Telemetry data from the bus will be analyzed at NPS and the payload data at Lawrence Livermore National Laboratory. This thesis outlines the concept of operation for the STARE CubeSat and investigates the possibility of using the data generated by STARE to augment the SSN to reduce the errors associated with conjunction analysis performed at the Joint Space Operations Center.; US Navy (USN) author

NPS-SCAT (Solar Cell Array Tester), the construction of NPS' first prototype Cubesat

Bein, Alexander L.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xiv, 79 p. : ill. (chiefly col.) ;
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Large, expensive satellites have had failures or degraded missions due to solar cells that had not been tested in the space environment. To address these issues, a solar cell testing CubeSat prototype has been developed as part of the Space Systems Academic Group CubeSat program. This prototype provides a dedicated and responsive solution to testing solar cells in space and, as the first CubeSat built at NPS, it gives valuable experience that will encourage CubeSat projects at NPS in the future. This Master's Thesis describes the NPS-SCAT (solar cell array tester) project, including the author's experience as program manager of the project, responsible for budget, schedule and technical deliverables. This thesis explains in detail the process that was used to develop the prototype and gives recommendations for the flight unit. An important conclusion of this thesis is that CubeSats show great promise for hands-on education and as potential platforms to conduct focused research of national interest.; US Navy (USN) author.

Diseño e implementación del software de vuelo para un nano-satélite tipo Cubesat

González Cortés, Carlos Eduardo
Fonte: Universidad de Chile Publicador: Universidad de Chile
Tipo: Tesis
ES
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Ingeniero Civil Eléctrico; El estándar de nanosatélites Cubesat fue pensado para facilitar el desarrollo de pequeños proyectos espaciales con fines científicos y educacionales, a un bajo costo y en cortos periodos de tiempo. Siguiendo esta línea, la Facultad de Ciencias Físicas y Matemáticas de la Uni- versidad de Chile ha impulsado el proyecto SUCHAI, que consiste en implementar, poner en órbita y operar el primer satélite desarrollado por una universidad del país. El computador a bordo de la aeronave, que consiste un sistema embebido de limitada capacidad de cómputo, escasa memoria y bajo consumo de energía, debe ejecutar el software de vuelo que controlará sus operaciones una vez en órbita. El objetivo de este trabajo es el diseño e implementación de este software para el satélite SUCHAI, como una solución confiable, flexible y extensible que sea la base para futuras misiones aeroespaciales. El diseño del software consiste en una estructura de tres capas, que consigue dividir el problema convenientemente. La de más bajo nivel considera los controladores de hardware, la capa intermedia alberga al sistema operativo, y la de nivel superior, contiene los detalles de la aplicación requerida específicamente para este sistema. Para la arquitectura de la capa de aplicación...