Preface

There are many professional and academic books on satellite systems, satellite communications, and satellite modeling and simulation (M&S). Academic textbooks tend to focus on existing and advanced satellite systems and basic principles of satellite operations and communications. The cover topics such as satellite orbits, baseband signals, digital communication techniques, Quality of Services (QoS), uplink and downlink, link budget calculation, satellite multiple access, satellite communication payload, satellite networks, and satellite ground stations (or Earth stations). Professional satellite books tend to focus on specific satellite systems and subsystems or technologies that require the reader to have a deep technical background to understand the contents. In general, professional satellite books can be classified into three categories: advanced professional/technical books, advanced professional modeling and simulation (M&S) books, and professional handbooks focusing on the latest technological challenges.

The content of this book is a mix of topics covered in existing professional/technical books and academic textbooks. This book provides a high-level description of (1) existing and future satellite systems, (2) practical satellite system design approaches, and (3) modeling, simulation, and analysis of existing satellite systems. It is a practical reference on satellite systems and their design, modeling, simulation, and analysis for system engineers, design engineers, system analysts, and researchers in satellite engineering and advanced mathematical modeling fields.

Chapter 1 examines existing and future satellite systems, including the Legacy Analog Bent-Pipe Satellite (ABPS), Digital Bent-Pipe Satellite (DBPS), Advanced Digital Bent-Pipe Satellite using Digital Channelizer and Beamformer (AdDBPS-DCB), and future Advanced Regenerative On-Board Processing Satellite (AR-OBPS). Chapter 2 provides an end-to-end overview of existing communication subsystems and describes the function of each subsystem and its relationship to other satellite subsystems. Chapter 3 describes satellite control capabilities and the proper functioning of satellite payload(s). It discusses space control and Space Situation Awareness (SAA) capabilities, which are required to address space debris challenges. Chapter 4 presents machine learning methods with novel neural networks. Chapter 5 provides an overview of a Modular Open System Architecture (MOSA) approach for future satellite system architectures. Chapter 6 discusses two design approaches for micro-satellites currently being used by the Technical University of Berlin and the University of Surrey. Chapter 7 presents an "open" architecture along with "modular" software and hardware design for building a universal, standardized, and scalable intelligent avionics system. Chapter 8 presents a modeling, simulation, and analysis approach to assess Telemetry, Tracking, and Command (TT&C) uplink and downlink supporting launch of a Medium Earth Orbiter (MEO) satellite to final orbital insertion. Chapter 9 focuses on the development of an effective algorithm for detecting and eliminating outliers from data measurements in Global Navigation Satellite Systems (GNSS). Chapter 10 explains several levels of satellite data processing for assessing the spatiotemporal variability of surface temperature and presents analysis results for a specific region. Finally, Chapter 11 presents a novel satellite imagery data compression approach using

sinusoidal amplitude grating to optimize storage space and bandwidth in satellite communications.

I would like to express my deep gratitude to all the authors and co-authors for their contributions. This book would not have been possible without their hard work as well as the support of outside reviewers and the staff at IntechOpen. I am especially grateful to Author Service Manager, Ms. Kristina Kardum Cvitan, for her help and conscientious support throughout the editing and publishing process, and my colleagues, Professors Charles Lee and Sam Behseta of California State University, Fullerton (CSUF), Mr. Leon Truong, Dr. Hung Nguyen, Mr. Andy Guillen, and Dr. Sumner Matsunaga of The Aerospace Corporation, California. Last but not least, I'm in debt to my wonderful wife, Thu-Hang Nguyen, for her constant moral support and encouragement during the process of creating this book.

> **Tien M. Nguyen** California State University in Fullerton (CSUF), Adjunct Research Professor and Visiting Scholar, Center for Computational and Applied Mathematics (CCAM) Fullerton, California, U.S.A

Section 1
