Fawwaz Ulaby

Fawwaz Tayssir Ulaby is a Syrian-American electrical engineer and one of the world's foremost pioneers in the science of microwave remote sensing, the use of radar and microwave instruments to observe and measure the surface of the Earth from a distance. Over a career spanning more than five decades, he has transformed the way scientists study the planet's land, vegetation, soil, and atmosphere, and he has trained generations of engineers who carry his methods forward. His textbooks have educated electrical engineering students across the globe, and his research has laid the scientific foundations for satellite and airborne systems that monitor the environment, agriculture, and natural resources.

Ulaby was born in 1943 in Damascus, Syria, the ancient capital that has been continuously inhabited for thousands of years. He grew up in a culture that revered learning and scholarship, heir to a long Arab and Islamic tradition of contributions to mathematics, astronomy, and the sciences. As a young man he showed an aptitude for mathematics and physics, and he was drawn to the rapidly advancing field of electronics and electromagnetics. After completing his early education in Syria, he earned his bachelor's degree in physics from the American University of Beirut in Lebanon in 1964, an institution that brought together students from across the Arab world and offered a rigorous education in the Western scientific tradition.

Seeking to deepen his training in engineering, Ulaby traveled to the United States, where he enrolled at the University of Texas at Austin. There he earned a master's degree and then a Ph.D. in electrical engineering in 1968, specializing in electromagnetics and the interaction of electromagnetic waves with matter. His doctoral work set the stage for what would become his life's central scientific theme: understanding how microwave energy interacts with the Earth's surface, and how that interaction can be measured and interpreted to reveal information about the land and its features.

After completing his doctorate, Ulaby joined the University of Kansas, where he became a faculty member and a leader of its renowned remote sensing laboratory. The 1970s were a critical period for the emerging field of microwave remote sensing, as scientists and engineers began to realize that radar, which had been developed for military detection during the Second World War, could be turned toward peaceful scientific ends. Radar and other microwave instruments have a unique advantage over optical cameras: they can see through clouds, operate day or night, and are sensitive to the physical properties of surfaces such as moisture content, roughness, and structure. Ulaby grasped the enormous potential of these capabilities and devoted himself to building the rigorous scientific understanding needed to exploit them.

His research focused on characterizing how microwaves scatter from and are emitted by natural surfaces, including soil, vegetation, snow, and crops. He conducted painstaking experiments, both in the laboratory and in the field, to measure the radar reflectivity and microwave emission of these targets under controlled conditions. From this work he and his collaborators developed mathematical models that related the measurements made by radar instruments to the physical characteristics of the surface, such as soil moisture, vegetation biomass, and surface roughness. These models became essential tools for interpreting the data gathered by airborne and satellite remote sensing systems, and they remain foundational to the field today.

One of Ulaby's most significant and enduring contributions is his authorship, together with colleagues, of the comprehensive three-volume reference work on microwave remote sensing, which systematically organized the theory, instrumentation, and applications of the field. This monumental work became the standard reference for researchers and practitioners worldwide and helped to establish microwave remote sensing as a mature scientific discipline. In addition to this specialized reference, Ulaby wrote widely used textbooks on applied electromagnetics that have introduced countless undergraduate engineering students to the fundamental principles of electromagnetic theory. His textbook on applied electromagnetics, in particular, became one of the most popular and respected texts in its field, valued for its clarity, rigor, and practical orientation.

In 1984, Ulaby moved to the University of Michigan, one of the leading engineering schools in the United States, where he would spend the rest of his distinguished academic career. At Michigan he continued his pioneering research, established and led major research centers, and mentored a large number of doctoral students who went on to become leaders in academia, industry, and government. He served in numerous leadership roles at the university, including as vice president for research, where he helped to shape the institution's research strategy and to foster interdisciplinary collaboration. He also founded and directed research centers focused on radar science, terahertz technology, and microelectronics, expanding the frontiers of the fields he worked in.

Throughout his career, Ulaby's work had profound practical applications. His scientific foundations underpin the satellite radar systems that monitor soil moisture for agriculture and drought prediction, track changes in forests and vegetation, observe sea ice and polar regions, and map the surface of the Earth and even other planets. The synthetic aperture radar systems flown on numerous satellites rely on the kind of scattering models and physical understanding that Ulaby and his contemporaries developed. His contributions thus extend far beyond the laboratory, touching agriculture, climate science, environmental monitoring, and planetary exploration.

Ulaby's excellence was recognized with many of the highest honors in engineering. He was elected to the National Academy of Engineering of the United States, one of the most prestigious distinctions an engineer can receive. He received the Institute of Electrical and Electronics Engineers (IEEE) Edison Medal, one of the oldest and most coveted awards in the field, in recognition of his pioneering contributions to applied electromagnetics and remote sensing. He also received numerous awards from professional societies, honorary doctorates from universities around the world, and recognition for his outstanding contributions to education. He served as president of the IEEE Geoscience and Remote Sensing Society, helping to guide the professional community in his field.

Beyond his research and teaching, Ulaby was deeply committed to engineering education and to the advancement of science in the Arab and developing world. He played a central role in the founding of the King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, serving as its founding provost and helping to establish a world-class research university in the region. This effort reflected his lifelong belief in the power of education and research to transform societies and to give young people the tools to contribute to human knowledge, much as he had done after leaving Syria as a young man.

The legacy of Fawwaz Ulaby is vast and enduring. As a researcher, he helped to create and define an entire scientific discipline, microwave remote sensing, whose tools now circle the planet aboard satellites and provide indispensable information about the environment and natural resources. As an educator, he wrote textbooks that have shaped the understanding of electromagnetics for generations of engineers, and he mentored doctoral students who continue his work around the world. As an institution builder, he strengthened research at major universities and helped to establish new centers of learning. And as a member of the Arab scientific diaspora, he stands as a powerful example of how a person born in Damascus could rise to the highest ranks of global engineering while never forgetting his responsibility to nurture science in his region of origin.

Fawwaz Ulaby's life demonstrates that careful, patient, fundamental science, combined with a gift for teaching and a dedication to building institutions, can produce a legacy that endures for generations. His name is inseparable from the field he helped to found, and the satellites that watch over the Earth's forests, fields, and ice carry forward the scientific understanding he devoted his life to establishing.