Resources around location.
The "grand-ole daddy" for general location/positioning services - in car, on water, in smart phones, etc.
| 1973 | GPS project was launched by US government |
| 1995 | Fully operational |
| 1996 | " In 1996, recognizing the importance of GPS to civilian users as well as military users, U.S. President Bill Clinton issued a policy directive[41] declaring GPS a dual-use system and establishing an Interagency GPS Executive Board to manage it as a national asset. " |
| 2000 | " On May 2, 2000 "Selective Availability" was discontinued as a result of the 1996 executive order, allowing users to receive a non-degraded signal globally. " |
| 2005 | "In 2005, the first modernized GPS satellite was launched and began transmitting a second civilian signal (L2C) for enhanced user performance.[44] " |
The EU initiative aiming for a non-military system with improved accuracy compared to alternatives:
"One of the aims of Galileo is to provide an indigenous alternative high-precision positioning system upon which European nations can rely, independently from the Russian GLONASS , China Bei Dou and USGPS systems, in case they were disabled by their operators.[3]" [wikipedia]
| 1999 | Discussions starts |
| 2003 | Galileo program is officially decided. |
| 2005 | First test satellite launched. |
| 2011 | First operational satellite launched. |
| 2016 | (May) 14 of 30 planned satellites are in orbit. |
| 2020 | (plan) Fully operational; w 24 satellites in use and 6 active spares. |
| System | Origin | When (starting) | Accuracy | |
|---|---|---|---|---|
| GPS | US | 1978 | 3.5 m, 95%, free, unencrypted ?, military |
|
| Galileo | EU | 2011-2019 | 1m, free, public 1cm, at cost, encrypted |
|
| GLONASS | Russia | 1982 | 4.5-7.4 meters |