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Articles 331 - 340 of 340
Full-Text Articles in Systems and Communications
Model Curricula: Esa Telecom Training Programme
Model Curricula: Esa Telecom Training Programme
Online Journal of Space Communication
This paper describes the content of an e-training course on satellite communications prepared under contract to ESA and now available at the ESA Telecom User Support Office website. The contract to develop this online training was led by EADS Fleximage with significant contributions from a team of subcontractors including EADS Astrium, British Telecom Exact Technologies, ENSAE/ SUP'Aero and ISU. The course is divided into five modules covering the following areas in an animated and progressive way:
- Systems and Services
- Communication Link
- Networking
- Space Segment
- Earth Segment
Model Curricula: International Space University
Model Curricula: International Space University
Online Journal of Space Communication
How to educate Space professionals able to meet the needs of the Space community and the challenges of a changing Space sector in a changing world? The International Space University (ISU) was created in 1987 to educate Space leaders using a unique approach. ISU programs are based on a "3-I" International, Interdisciplinary and Intercultural) model which was built from discussions and meetings within the world Space community to meet its evolving needs.
Model Curricula: Ohio University
Model Curricula: Ohio University
Online Journal of Space Communication
Programs of Education Relating to Satellite and Space Communication in:
Telecommunication Communications Systems Management
Electrical Engineering and Computer Science
Model Curricula: George Washington University
Model Curricula: George Washington University
Online Journal of Space Communication
There is a growing need for qualified engineers, scientists, technicians, marketing and sales and management personnel in the field of satellite applications and only a few universities that are actually offering undergraduate or graduate degrees in this area.
Model Curricula: Embry-Riddle Aeronautical University
Model Curricula: Embry-Riddle Aeronautical University
Online Journal of Space Communication
Many universities have added courses and curricula related to satellites and space. A search of the Internet reveals that few of these are designated degree programs in space studies degree, rather they are traditional programs offering courses and concentrations which involve study of space and space applications from several perspectives. The Internet search also reveals a large variation in both the titles and the curricula for these programs. The author has sought to standardize definitions, identify workable program names and suggest core courses. Five programs and their core courses are outlined for consideration.
Database Of Academic Institutions: International
Database Of Academic Institutions: International
Online Journal of Space Communication
Institutions, research centers and professional associations around the world that do research and teach content and skills relating to satellite and space communication.
Database Of Academic Institutions: United States K-12
Database Of Academic Institutions: United States K-12
Online Journal of Space Communication
Institutions, research centers and professional associations in the United States that do research and teach content and skills relating to satellite and space communication at the K-12 level.
Nonlinear Least Squares 3-D Geolocation Solutions Using Time Differences Of Arrival, Michael V. Bredemann
Nonlinear Least Squares 3-D Geolocation Solutions Using Time Differences Of Arrival, Michael V. Bredemann
Mathematics & Statistics ETDs
This thesis uses a geometric approach to derive and solve nonlinear least squares minimization problems to geolocate a signal source in three dimensions using time differences of arrival at multiple sensor locations. There is no restriction on the maximum number of sensors used. Residual errors reach the numerical limits of machine precision. Symmetric sensor orientations are found that prevent closed form solutions of source locations lying within the null space. Maximum uncertainties in relative sensor positions and time difference of arrivals, required to locate a source within a maximum specified error, are found from these results. Examples illustrate potential requirements …
Single-Degree-Of-Freedom Experiments Demonstrating Electromagnetic Formation Flying For Small Satellite Swarms Using Piecewise-Sinusoidal Controls, Ajin Sunny
Theses and Dissertations--Mechanical and Aerospace Engineering
This thesis presents a decentralized electromagnetic formation flying (EMFF) control method using frequency-multiplexed sinusoidal control signals. We demonstrate the EMFF control approach in open-loop and closed-loop control experiments using a single-degree-of-freedom testbed with an electromagnetic actuation system (EAS). The EAS sense the relative position and velocity between satellites and implement a frequency-multiplexed sinusoidal control signal. We use a laser-rangefinder device to capture the relative position and an ARM-based microcontroller to implement the closed-loop control algorithm. We custom-design and build the EAS that implements the formation control in one dimension. The experimental results in this thesis demonstrate the feasibility of the …
Dual Fine Tracking Control Of A Satellite Laser Communication Uplink, Louis A. Noble
Dual Fine Tracking Control Of A Satellite Laser Communication Uplink, Louis A. Noble
Theses and Dissertations
A dual fine tracking control system (FTCS) is developed for a single aperture optical communication receiver to compensate for high frequency disturbances affecting tracking of two incident laser communication beams. The optical communication receiver resides within a payload module aboard a geosynchronous satellite, while each laser communication transmitter is housed within a module aboard a high altitude unmanned aerial vehicle (UAV). In addition to platform specific disturbances, the impact of atmospheric optical disturbances affecting tracking error are investigated. The system dynamics and FTCS are modeled and evaluated in MATLAB and SIMULINK. An optimal controller is developed to mitigate these disturbances …