Book excerpt: "This new edition introduces the fundamentals of passive microwave remote sensing of oceans including the physical principles of microwave radiometry, novel observational data, their interpretation, and applications. It not only demonstrates and examines the recent state-of-the-art of microwave data but also provides guidance for explaining complex ocean studies and advanced applications. All chapters are thoroughly updated with detailed analysis of space-based microwave missions and a new chapter on space-based microwave radiometer experiments has been added. The power of microwave remote sensing is discussed as a tool for the diagnostics of ocean phenomena in research and education"--