It is called Galileo :)
Ge
> Le 2 mai 2019 à 22:35, Scott Weeks <sur...@mauigateway.com> a écrit :
>
>
>
>> But wait. What is the GPS constellation goes down?
>> THEN we have bigger problems :)
>> --------------------------------------------------
>>
>>
>> What if the US military intentionally messes with
>> the signal to thwart the advances of an enemy who
>> is using GPS in their attack? ;-)
> ------------------------
> --- m...@beckman.org wrote:
>
> Enemies aren’t dependent on US GPS, by the way. lol!
> -----------------------------------------------
>
> Oops, but still from the second link: "...which could
> be disabled or degraded by their operators at any time"
>
> Most big countries say the same: "...will provide an
> alternative global navigation satellite system..."
>
> scott
>
>
>
> Details for the intrested.
>
>
> https://en.wikipedia.org/wiki/GLONASS
>
> "Russian...provides an alternative to GPS and is the
> second navigational system in operation with global
> coverage and of comparable precision.
>
>
> https://en.wikipedia.org/wiki/Galileo_(satellite_navigation)
>
> "...live in 2016,[4] created by the European Union"
> "...so European nations do not have to rely on the
> U.S. GPS, or the Russian GLONASS systems, which could
> be disabled or degraded by their operators at any time"
>
>
> https://en.wikipedia.org/wiki/BeiDou
>
> "a Chinese satellite navigation system....Beidou-1 was
> decommissioned at the end of 2012."
> "BeiDou-2, became operational in China in December 2011
> with a partial constellation of 10 satellites in orbit.
> Since December 2012, it has been offering services to
> customers in the Asia-Pacific region."
> "In 2015, China started the build-up of the third
> generation BeiDou system (BeiDou-3) for global coverage
> constellation. The first BDS-3 satellite was launched on
> 30 March 2015.[5] As of October 2018, fifteen BDS-3
> satellites have been launched[6]. BeiDou-3 will
> eventually consist of 35 satellites and is expected to
> provide global services upon completion in 2020. When
> fully completed, BeiDou will provide an alternative
> global navigation satellite system to the United States
> owned Global Positioning System (GPS),[7][8] the Russian
> GLONASS or European Galileo systems and is expected
> to be more accurate than these
>
>
>
> https://en.wikipedia.org/wiki/Indian_Regional_Navigation_Satellite_System
>
> "...is an autonomous regional satellite navigation
> system that provides accurate real-time positioning
> and timing services.[4] It covers India and a region
> extending 1,500 km (930 mi) around it, with plans for
> further extension."
>
>
> https://en.wikipedia.org/wiki/Quasi-Zenith_Satellite_System
>
> "...a project of the Japanese government for the
> development of a four-satellite regional time transfer
> system and a satellite-based augmentation system for the
> United States operated Global Positioning System (GPS)
> to be receivable in the Asia-Oceania regions, with a
> focus on Japan.
>
>
>
