Comprehensive overview of ESA's projects and technology research in space telecommunication systems. Includes tendering information and updated project status.

A consulting firm located in the Washington, DC area in Bethesda, MD that provides engineering and research services in satellite communication systems engineering, including orbital mechanics, spacecraft design, and RF link analysis. The company president, Dr. Robert A. Nelson, P.E., is a leading industry consultant, author, and lecturer.

Iridium satellites provide planetary covering with sat-cellular phones. Normally invisibile to naked eye, sometimes these satellites can bright up to magnitude -8 and they can be seen even in daylight. Learn how to predict them!

This portal directory website provides over 2,300 links in 300+ categories relating to satellite communications covering services, products, employment opportunities, resumes, industry events, publications, market information, and reference library containing white papers and articles.

Spacecraft and mission profile from the National Space Science Data Center.

Provides project overview and data on a Japanese spacecraft launched in 2002.

This website has been developed for the scientists and engineers of the United Kingdom Satellite Communications industry and for everyone interested in learning about satellite communications.

Technical article by Robert Nelson describing the Iridium satellite communication system.

Calculates uplink and downlink link budgets together with azimuth and elevation

The Optical Communications Group at NASA / JPL is developing the next generation of satellite communications systems that are 10 to 100 times faster than current state-of-the-art systems.