Peter Duffett Smith

Peter Duffett-Smith is a British physicist and professor emeritus at the University of Cambridge, known for his work in radio astronomy and positioning systems. His research contributions include developing innovative methods for radio interferometry and pioneering work on mobile positioning technology. He founded Cambridge Positioning Systems Ltd in 1995 and served as its Chief Technology Officer, developing cellular positioning systems used in mobile networks. Duffett-Smith authored the widely-used textbook "Practical Astronomy with Your Calculator," first published in 1979 and now in its fourth edition. The book has become a standard reference for amateur astronomers and students, providing step-by-step instructions for astronomical calculations. In addition to his academic work, he holds numerous patents in the field of mobile positioning technology and has made significant contributions to the development of location-based services in telecommunications.

Readers focus primarily on Duffett-Smith's "Practical Astronomy with Your Calculator," viewing it as a functional guide for amateur astronomers and students. What readers liked: - Clear step-by-step instructions for calculations - Practical examples and problem-solving approaches - Logical organization of content - Usability for both beginners and intermediates - Continued relevance despite calculator focus What readers disliked: - Dated technology focus on calculators rather than computers - Limited explanations of underlying astronomical concepts - Some mathematical steps need more detail - Print quality issues in newer editions - No coverage of modern digital tools From Goodreads (3.96/5 from 56 ratings): "Perfect for learning the mechanics of astronomical calculations" - Amateur astronomer "Shows its age but still valuable" - Student reviewer From Amazon (4.3/5 from 89 reviews): "Essential reference but needs modernization" - Astronomy hobbyist "Good for fundamentals but could use more theory" - College student Note: Limited online reviews found for his academic papers and research publications.

Practical Astronomy with Your Calculator (1979) A technical manual providing step-by-step instructions for performing astronomical calculations manually, covering topics like coordinate systems, time conversions, and celestial navigation.

Practical Astronomy with Your Calculator and Spreadsheet (4th Edition, 2011) An updated version of the original text incorporating modern computational tools, maintaining the same systematic approach to astronomical calculations while adding spreadsheet implementations.

Martin Mobberley A British astronomer who writes technical guides for amateur astronomers, focusing on practical observing techniques and equipment. His books provide detailed instructions and calculations similar to Duffett-Smith's approach.

Jean Meeus A Belgian astronomer and mathematician who writes authoritative texts on astronomical calculations and algorithms. His books "Astronomical Algorithms" and "Mathematical Astronomy Morsels" contain precise computational methods for astronomical phenomena.

Roger W. Sinnott An editor at Sky & Telescope magazine who writes about practical astronomy and computational methods. His work focuses on astronomical calculations and observational techniques for both beginners and experienced astronomers.

Stephen Tonkin A British astronomy educator who writes practical guides for amateur astronomers and stargazers. His books include detailed mathematical procedures and observing instructions that build on fundamental astronomical concepts.

Patrick Moore A British astronomer who wrote numerous books on practical astronomy and observational techniques. His works combine technical instruction with computational methods for amateur astronomers.