Protecting Communications Satellites from Space Weather
نویسندگان
چکیده
منابع مشابه
Space Weather Effects on Communications
An overview of historical and contemporary impacts of the solar and geospace environments on communications systems. Abstract In the last century and one-half, since the invention and deployment of the first electrical communication system – the electrical telegraph, the variety of communications technologies that can be affected by natural processes occurring on the Sun and in the space enviro...
متن کاملSpace Weather Support for Communications
Ionospheric variability (space weather) significantly impacts ground and space-based communications. In essence, the electrically charged particles of the ionosphere (i.e., the partially ionized portion of the atmosphere starting at about 40 nautical miles (nm) above the Earth's surface) can attenuate, totally absorb, reflect, change direction of propagation, and change the phase and amplitude ...
متن کاملThesis Proposal Space Environment Impacts on Geostationary Communications Satellites
1. Problem Statement and Objectives 1.1. Problem Statement 1.2. Objectives 1.2.1. Research Questions 1.3. Background 1.3.1. Trends in Geostationary Communication Satellite Design 1.3.1.1. What are power amplifiers? Why are they important? 1.3.1.2. Traveling Wave Tube Amplifiers 1.3.1.3. Solid State Power Amplifiers 1.3.1.4. SSPA vs. TWTA Space Technologies 1.3.2. Space Weather Phenomena 1.3.2.1...
متن کاملDownlink Communications from 50kg Class Small Satellites
Recently small satellites start playing important roles in earth observation missions. It, however, is true that small satellites have drawbacks of sensor resolutions and down link data rate. As a solution to the latter drawback, we have developed novel communications system for 320Mbps down link with 16QAM for small satellites with 50kg class. We developed a new GaN HEMT X-band amplifier with ...
متن کاملProtecting Communications against Forgery
This paper is an introduction to cryptography. It covers secretkey message authentication codes, unpredictable random functions, public-key secret-sharing systems, and public-key signature systems.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Eos
سال: 2015
ISSN: 2324-9250
DOI: 10.1029/2015eo037281