This book covers all aspects of foliage penetration (FOPEN) radar, concentrating on both airborne military radar systems as well as earth resource mapping radars. It is the first concise and thorough treatment of FOPEN, covering the results of a decade-long investment by DARPA in characterizing foliage and earth surface with ultrawideband UHF and VHF synthetic aperture radar (SAR). Comparisons of the technologies for radar design and signal processing are presented, as are specific design approaches for transmitter design for operation in a dense radio frequency spectrum. Adaptive processing to remove the effects of radio and television signals from the system are also covered. In 10 years, FOPEN systems will find use in crop monitoring, land mine remediation, and creating digital maps under trees. This book will be the foundation for continued research for years to come both for radar and systems engineers in defense and earth resources companies. Government researchers, program managers and planners who have an interest in the unique capabilities of this radar technology, as well as university staff and faculty teaching radar and signal processing will find this book a critical part of their learning for years to come.

From Space to Earth tracks the evolution of the technology of photovoltaics, the use of solar cells to convert the sun's energy into electricity. John Perlin's painstaking research results in a fascinating account of the development of this technology, from its shaky nineteenth-century beginnings mired in scientific controversy to its high-visibility success in the space program, to its current position as a versatile and promising power source.

The claim that evolution undermines Christianity is standard fare in our culture. Indeed, many today have the impression that the two are mutually exclusive and that a choice must be made between faith and reason—rejecting Christianity on the one hand or evolutionary theory on the other. Is there a way to square advances in this field of study with the Bible and Church teaching? In this book—his fourth dedicated to applying Joseph Ratzinger/Benedict XVI’s wisdom to pressing theological difficulties—Matthew Ramage answers this question decidedly in the affirmative. Distinguishing between evolutionary theory properly speaking and the materialist attitude that is often conflated with it, Ramage’s work meets the challenge of evolutionary science to Catholic teaching on human origins, guided by Ratzinger’s conviction that faith and evolutionary theory mutually enrich one another. Pope Benedict gifted the Church with many pivotal yet often-overlooked resources for engaging evolution in the light of faith, especially in those instances where he addressed the topic in connection with the Book of Genesis. Ramage highlights these contributions and also makes his own by applying Ratzinger’s principles to such issues as the meaning of man’s special creation, the relationship between sin and death, and the implications of evolution for eschatology. Notably, Ramage shows that many apparent conflicts between Christianity and evolutionary theory lose their force when we interpret creation in light of the Paschal Mystery and fix our gaze on Jesus, the New Adam who reveals man to himself. Readers of this text will find that it does more than merely help to resolve apparent contradictions between faith and modern science. Ramage’s work shows that discoveries in evolutionary biology are not merely difficulties to be overcome but indeed gifts that yield precious insight into the mystery of God’s saving plan in Christ.