Jonathan M. Marr is a senior lecturer of physics and astronomy at Union College. His research involves high-resolution, radio-wavelength observations of radio galaxies and the Galactic center. He earned a PhD in astronomy from the University of California, Berkeley.

Ronald L. Snell is a professor of astronomy at the University of Massachusetts, Amherst. His research interests include the physical and chemical properties of molecular clouds, star formation, and molecular outflows; he also has extensive experience observing at radio wavelengths. He earned a PhD in astronomy from the University of Texas at Austin.

Stanley E. Kurtz is a professor of radio astronomy and astrophysics at the National Autonomous University of Mexico. His research interests include massive star formation, the interstellar medium, and radio astronomy instrumentation and techniques. He earned a PhD in physics from the University of Wisconsin at Madison.

Introductory Material. Introduction to Radiation Physics. Radio Telescopes. Single-Dish Radio Telescope Observations. Aperture Synthesis Basics: Two-Element Interferometers. Aperture Synthesis: Advanced Discussion. Appendices.