Editing Satellite navigation (section)

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===Information on specific GNSS systems===
* [http://www.esa.int/esaNA/GGG63950NDC_egnos_0.html ESA information on EGNOS]
* [https://web.archive.org/web/20020621064652/http://www.astronautix.com/craft/beidou.htm Information on the Beidou system]
* [https://www.ieee.li/pdf/viewgraphs/gnss_fundamentals.pdf Global Navigation Satellite System Fundamentals]

===Organizations related to GNSS===
* [http://www.unoosa.org/oosa/en/SAP/gnss/icg.html United Nations International Committee on Global Navigation Satellite Systems (ICG)]
* [http://www.ion.org/meetings/#gnss Institute of Navigation (ION) GNSS Meetings]
* [http://www.igs.org/ The International GNSS Service (IGS)]
* [http://www.ignss.org/ International Global Navigation Satellite Systems Society Inc (IGNSS)]
* [http://www.iers.org/MainDisp.csl?pid=84-63 International Earth Rotation and Reference Systems Service (IERS) International GNSS Service (IGS)]
* [http://www.pnt.gov/ US National Executive Committee for Space-Based Positioning, Navigation, and Timing]
* [http://www.ngs.noaa.gov/orbits/ US National Geodetic Survey] Orbits for the Global Positioning System satellites in the Global Navigation Satellite System
* [http://facility.unavco.org/science_tech/gnss_modernization.html UNAVCO GNSS Modernization]
* [http://www.apecgit.org/ Asia-Pacific Economic Cooperation (APEC) GNSS Implementation Team]

===Supportive or illustrative sites===
* [http://rhp.detmich.com/gps.html GPS and GLONASS Simulation] ([[Java applet]]) Simulation and graphical depiction of the motion of space vehicles, including [[Dilution of precision (GPS)|DOP]] computation.
* [http://northsurveying.com/index.php/soporte/gnss-and-geodesy-concepts GPS, GNSS, Geodesy and Navigation Concepts in depth]

=== Alternatives to GNSS ===
* [https://afwerxchallenge.com/altpntchallenge USSF Alternative Positioning, Navigation, & Timing Challenge Definition Workshop]
* [https://spacenews.com/startup-pnt-services/ Startups map out strategies to augment or backup GPS]
* [https://spacenews.com/competing-with-uncle-sams-free-space-offerings/ Competing with Uncle Sam’s free space offerings]

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[[Category:Satellite navigation| ]]
[[Category:American inventions]]
[[Category:Aircraft instruments]]
[[Category:Avionics]]
[[Category:Geodesy]]
[[Category:Maritime communication]]
[[Category:Navigational equipment]]