Introduction to GPS and GNSS: Principles and Modern Applications

Location data powers the modern world, from navigation apps on your phone to precision agriculture and logistics tracking. Understanding the fundamental principles behind Global Positioning Systems (GPS) and Global Navigation Satellite Systems (GNSS) is essential for anyone working with geospatial data, mapping, or location-based technologies. Through this text-based course, you will transition from a user of location services to a professional who understands how satellite navigation works. You will learn the core physics and geometry of positioning, how signals are transmitted and processed, and how to work with modern multi-constellation systems to solve real-world spatial problems. What you'll learn: - Understand the core terminology, history, and foundational concepts of satellite-based positioning. - Explain the mathematical principles of trilateration, signal propagation, and error sources in GPS tracking. - Compare different global constellations including GPS, GLONASS, Galileo, and BeiDou. - Analyze modern high-precision techniques like Real-Time Kinematic (RTK) and Differential GPS (DGPS). - Apply coordinate systems, datums, and map projections to real-world geospatial datasets. - Explore how GNSS data integrates with modern mobile devices, IoT sensors, and GIS software. The course begins with the essential definitions and historical context of satellite navigation before moving into signal structures, error correction, and multi-constellation systems. You will then study practical integration methods, working through written scenarios and conceptual exercises to solidify your knowledge. This course is designed for absolute beginners, including aspiring GIS professionals, developers wanting to integrate location data, and curious tech enthusiasts. No prior background in aerospace engineering or advanced mathematics is required. Start reading today to master the foundations of global satellite positioning.