Human Space Flight (HSF) - Realtime Data
NASA Skywatch Sightings Calculator - A Java applet that will calculate when spacecraft will be visible in the night sky over the viewer's own location.
http://spaceflight.nasa.gov/realdata/sightings/
Northrop Grumman Aerospace Systems
Northrop Grumman Aerospace Systems - Provides space, defense and electronics systems. Products include: satellites for communications, science, weather, surveillance and high energy lasers.
http://www.as.northropgrumman.com/
The Elwing Company
The Elwing company designs reliable electric propulsion systems for the worldwide satellite industry
http://www.elwingcorp.com/
Aerospace Online: Digital Marketplace for the avionics industry
Resource for professionals in the avionics industry- Information on aviation maintenance, air transport, air traffic control, rotorcraft, military aviation, avionics systems integration and more
http://www.aerospaceonline.com/
Swiss Space Technology
Swiss Space Technology - Space electronics, microprocessor and programmable logic design. Based in Champery, in the Swiss Alps.
http://www.swissspacetech.com/
