Radio Sounding and Plasma Physics: 2007 Radio Plasma Imager Science Team Meeting, April 27, 2007; Radio Sounding and Plasma Physics Symposium, April 29, 2007; XI International Digisonde Forum, April 30 May 3, 2007

This volume provides an introduction to the principles of radio sounding, a description of advances in hardware and data systems, and data processing and analysis software, including electron density profile inversions, for data from modern digital ionospheric sounders, especially the digisondes, and digisonde operation instructions. It is the most comprehensive documentation for digisondes and can serve as a master reference source for digisonde users. It also provides an overview of the international research activities using radio sounding and presents the newest scientific results from the Radio Plasma Imager on NASA s IMAGE satellite and related plasma physics subjects.