The 1000-page book covers theoretical models, system design and operation, and geoscientific applications of active and passive microwave remote sensing systems. It is designed as a textbook for a postgraduate course, as well as a reference for the practicing professional. To facilitate understanding and use of the material, the book includes 50 MATLAB-based computer codes and the book's website includes interactive modules based on theoretical and empirical models. The book is a must-have for every scientist and engineer with interest in microwave remote sensing.