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>... even precision missiles. So if GPS were to be jammed, or disabled by a hack into the ground control systems -- PLA missiles would still work just fine. Hmm.
GPS is too easy to jam, no serious military application would use GPS exclusively.
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It’s not about “more control”. The first beidou was two way mainly because they need some kind of satellite phone functionality.
That what was said to the populace. In reality, first gen beidou sats already had functionality to provide atomic clock signal and advanced station keeping. The accuracy was quite lower than from leo GPS sats, but still. The explanation that beidou 1 was a glorified, super expensive satellite pager, with navigation functionality as an afterthought does not hold water. This "explanation" came much later than the comme…
The reason Beidou I needs two way transmission is they wanted add pager functionality to its navigation functionality. The party wants more control has nothing to do with Beidou I's two way transmission mechanism. When Beidou I was developed, it's mostly used by military. The party doesn't need "more control" there.
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That what was said to the populace. In reality, first gen beidou sats already had functionality to provide atomic clock signal and advanced station keeping. The accuracy was quite lower than from leo GPS sats, but still. The explanation that beidou 1 was a glorified, super expensive satellite pager, with navigation functionality as an afterthought does not hold water. This "explanation" came much later than the comme…
Looks like some misunderstanding here. No one ever claimed Beidou I was developed as a satellite pager. The reason Beidou I needs two way transmission is they wanted add pager functionality to its navigation functionality. The party wants more control has nothing to do with Beidou I's two way transmission mechanism. When Beidou I was developed, it's mostly used by military. The party doesn't need "more control" there…
China already had military digital satellite coms working by late nineties. For them, it was of even lesser utility.
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> "We are likely to see an increased bifurcation of the world into two camps - 'pro-China' and 'pro-US'", says Blaine Curcio, founder of Orbital Gateway Consulting Why just two? If our stranglehold on the world breaks, the EU and Russia are easily capable of carving out their sphere of influence. People really underestimate how populous and wealthy and powerful the EU is. It's strange how the narrative changes in suc…
The EU is wealthy but has limited power projection. Only France and the UK can realistically be considered great powers, and even then not on the scale of the US, China, or Russia.
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> so in the event of a war the DOD can disable the civilian signal as the M code will work standalone, hence a third party nation cannot rely on GPS. They also had the option in older satellites of turning on selective availability, which would degrade the civilian location service from 5-meter to 100-meter accuracy without affecting the military service. Purportedly newer GPS satellites don't have the option anymore…
> Purportedly newer GPS satellites don't have the option anymore. That does sound suspiciously like something the military would want you to believe
There are probably other, newer ways to prevent an adversary to use the GPS signal, but there is little reason to doubt that SA is gone.
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The EU is wealthy but has limited power projection. Only France and the UK can realistically be considered great powers, and even then not on the scale of the US, China, or Russia.
France and the UK? What about Germany?
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Looks like some misunderstanding here. No one ever claimed Beidou I was developed as a satellite pager. The reason Beidou I needs two way transmission is they wanted add pager functionality to its navigation functionality. The party wants more control has nothing to do with Beidou I's two way transmission mechanism. When Beidou I was developed, it's mostly used by military. The party doesn't need "more control" there…
Military use??? You understand what two way transmission means during a conflict? An enemy tunes an antiradiation missile on your frequency, and voila... China already had military digital satellite coms working by late nineties. For them, it was of even lesser utility.
My point is that many things in China may be explained by the party wanting more control, but two way transmission of beidou I is not one of them.
So China has the technology to destroy satellites [1], and is developing alternatives to US satellites. Does this make anyone else nervous? Maybe Trump has a point when he says we should stop letting China steal our technology. [1] https://en.wikipedia.org/wiki/2007_Chinese_anti-satellite_mi...
>So China has the technology to destroy satellites [ Any country that can launch a satellite has a technology to destroy one. It's called a missile. You don't even need to go to orbit - just intersect the orbit of the target and dump a bucket of nails in its path.
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The United States actually does have the ability to selectively degrade signals. I don't know enough to comment on this capability in more detail (another comment seems to indicate that it is through jamming). A relevant excerpt (from 2000) is below: > Additionally, we have demonstrated the capability to selectively deny GPS signals on a regional basis when our national security is threatened. https://www.faa.gov/abo…
Selective availability was defeated a long time ago which is one of the motivations for Clinton formally turning it off in 2000. Also while I'm sure that the US military is fully capable of turning off GPS satellites however they want the efficacy of this is probably limited considering the coverage of GLONASS + EGNOS.
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France and the UK? What about Germany?
In term of military power mostly I guess. It's the only EU nations with nuclear weapons, aircrafts carrier, nuclear submarines, ...