ALLSAT GmbH (GPS-Controllersoftware GART-2000, Leica/Javad Distributor)
Manufacturers of GPS Receivers
Leica Geosystems
JAVAD Navigation Systems
Magellan
Garmin International
TOPCON Positioning Systems
NovAtel Communications Ltd.
Trimble Navigation Ltd.
Canadian Marconi Company
SOKKIA
Septentrio
Information about GPS
GPS Support Center (Air Force Space Command Organization)
Global Positioning System (Constellation Status)
Galileo (European Satelliten Navigation System)
CANSPACE (E-Mail Forum of UNB)
Mike Craymer (Excellent Revues about GPS)
Europäische Raumfahrtagentur (ESA)
Deutsches Zentrum für Luft und Raumfahrt (DLR)
Bundesamt für Kartographie und Geodäsie (BKG, former IfAG)
North American Space Agency (NASA)
Spaceweather (Information about the Sun-Earth environment)
International GNSS Service for Geodynamics (IGS, precise Ephemeries)
GLONASS (Russian Satellite Navigation System)
University of New Brunswick (Excellent Links)
University NAVSTAR Consortium (UNAVCO)
International Earth Rotation Service (IERS)