Related External Websites

IGS Contributing and Partner Organizations

• IGS Data Centers and Analysis Centers.
• International Union of Geodesy and Geophysics (IUGG)
• International Association of Geodesy (IAG)
• Federation of Astronomical and Geophysical Data Analysis Services(FAGS)
• International Earth Rotation Service (IERS)
• IERS Terrestrial Reference Frame (ITRF)
• IGS Analysis Center Coordinator (ACC)
• International VLBI Service for Geodesy and Astrometry (IVS)
• International Laser Ranging Service: http://ilrs.gsfc.nasa.gov
• International DORIS Service (IDS) 
• Bureau International des Poids et Mesures (BIPM)
• National Earth Orientation Service, USNO (NEOS)
• University NAVSTAR Consortium (UNAVCO)
• JPL's Ionospheric and Atmospheric Remote Sensing:http://iono.jpl.nasa.gov
• GPS Environmental & Earth Science Information System (GENESIS):http://genesis.jpl.nasa.gov

Related GPS Networks

• Southern California Integrated GPS Network (SCIGN)
• Plate Boundary Observatory http://www.unavco.org/PBO/PBO.html
• Pacific Northwest Geodetic Array - PANGAhttp://www.geodesy.cwu.edu
• Basin and Range Geodetic Network - BARGEN http://cfa-www.harvard.edu/space_geodesy/BARGEN/
• Eastern Basin-Range and Yellowstone - EBRY
• Alaska Deformation Array - AKDAhttp://www.aeic.alaska.edu/Input/akda/
• Long Valley Caldera, California Volcano Observatory 
• Cascades Volcano Observatory http://vulcan.wr.usgs.gov/
• Hawaiian Volcano Observatory http://hvo.wr.usgs.gov/
• University of Miami Space Geodesy Lab http://www.geodesy.miami.edu/
• NRCan's Western Canada Deformation Array (WCDA)http://gsc.nrcan.gc.ca/geodyn/index_e.php
• NRCan's Geodetic Survey Division's Canadian Spatial Reference System
• National Geodetic Survey (NGS) Continuously Operating Reference Stations (CORS) http://www.ngs.noaa.gov/CORS/
• EUREF Permanent Network (EPN) http://epncb.oma.be
• Ordnance Survey UK National GPS Network https://www.ordnancesurvey.co.uk/business-and-government/products/os-net/ 
• Ordnance Survey Ireland https://www.osi.ie/services/geodetic-services/
• Satellitenpositionierungsdienst (SAPOS) http://www.sapos.de
• Geodetic Infrastructure for Antarctica (GIANT) https://www.scar.org/science/gsg/home/
• Bay Area Regional Deformation (BARD) http://quake.geo.berkeley.edu/bard/bard.html
• JPL's IGDG http://gmon1la.gdgps.net/
• Red GNSS de Castilla y León http://gnss.itacyl.es 

Related Links and Sites of Interest 

• American Geophysical Union: http://www.agu.org
• U.S. Coast Guard Navigation Information Center:http://www.navcen.uscg.gov
• U.S. Department of Transportation: http://www.dot.gov
• Institute of Navigation: http://www.ion.org
• Federal Geodetic Control Subcommittee: https://www.fgdc.gov/organization/working-groups-subcommittees/fgcs
• Canadian Space Geodesy Forum (CANSPACE): http://gauss.gge.unb.ca/CANSPACE.html
• National Geospatial-Intelligence Agency http://earth-info.nga.mil/GandG/
• MIT Haystack Observatory: https://www.haystack.mit.edu/geo/index.html
• An Overview of the Global Positioning System. , developed by Peter H. Dana, The Geographer's Craft Project, Department of Geography, The University of Colorado at Boulder.
• The Geographer's Craft Project, Department of Geography, The University of Colorado at Boulder:http://www.colorado.edu/geography/gcraft/contents.html

GNSS System Providers

• GPS: http://www.gps.gov
• GLONASS: http://www.glonass-center.ru
• Galileo: http://www.esa.int/Our_Activities/Navigation/Galileo/What_is_Galileo

Online positioning services of IGS agencies

• APPS (JPL)
• Australian Regional GNSS Network (ARGN) - Geoscience Australia
• OPUS (NGS CORS)
• Scripps Orbit and Permanent Array Center (SOPAC)
• CSRS-PPP (NRCAN GSD)

General GPS (and Related) Resources

• Inside GNSS: http://www.insidegnss.com
• United States Coast Guard (USCG) Navigation Center (NAVCEN): https://www.navcen.uscg.gov
• Aerospace Corporation's GPS Primer:http://www.aero.org/education/primers/gps
• United States Federal Aviation Administration GPS Satellite Navigation: https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/gps/
• GPS World Online: http://www.gpsworld.com
• Navtech Seminars & GPS Supply: http://www.navtechgps.com