الصفحة 1
الصفحة 1
Satellite communications
There has been a complete transition from analog to digital communication systems, withanalog techniques replaced by digital modulation and digital signal processing. While distribution of television programming remains the largest sector of commercial satellite communications, low earth orbit constellations of satellites for Internet access are set to challenge that dominance. this book: Focuses on the fundamental theory of satellite communications / Explains the underlying principles and essential mathematics required to understand the physics and engineering of satellite communications / Discusses the expansion of satellite communication systems in areas such as direct-broadcast satellite TV, GPS, and internet access / Introduces the rapidly advancing field of small satellites, referred to as SmallSats or CubeSats / Provides relevant practice problems based on real-world satellite systems
Protection of Materials and Structures from the Space Environment ; ICPMSE-7
The book is targeting organizations and individuals involved with space material selction, their reliability and influence of space environmental effects on materials and structures.
Atmosphere and Climate : Studies by Occultation Methods
In this book we focus on sensors on Low Earth Orbit (LEO) satellites, which exploit solar, lunar, stellar, GNSS (Global Navi- tion Satellite Systems), and LEO-crosslink signals for observing the Earth's - mosphere and climate. The methods all share the key properties of self-calibration, high accuracy and vertical resolution, global coverage, and (if using radio signals) all-weather ca- bility. The atmospheric parameters obtained extend from the fundamental va- ables temperature, density, pressure and water vapor via trace gases, aerosols and cloud liquid water to ionospheric electron density. Occultation data are therefore of high value in a wide range of fields including climate monitoring and research, atmospheric physics and chemistry, operational meteorology, and ionospheric physics.
