- Devoted to CQ-TV mobile electronic publications.
E-books related to ATV (Amateur Television) and although the site is called DATV (Digital Amateur Television), it covers not only digital ATV, but all aspects of ATV
Global Positioning System Primer
- Welcome to the Global Positioning System (GPS)
What is GPS? What is Navigation?
GPS Elements Satellites in Space Ground Control Stations and Receivers, How GPS Works - An Amazing System, Military Uses for GPS
- The general Catalogue of Publications contains all current publications,except the Standards currently in force, which can be found in the separate List of ITU-T Recommendations and List of ITU-R Recommendations.