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The Chinese navigation system will include an encrypted channel as well

People all over the planet depend on the GPS satellite positioning system for all sorts of things from navigating in their cars to keeping up with equipment and personnel. China says that it intendeds to have an operational GPS system covering all of Asia by 2010.

Despite the 2010 date specified, Chinese officials aren’t giving up much information. In fact officials from Japan say that it and China have had no talks concerning interoperability of the two nations GPS satellite systems. This is despite the fact that both China and Japan are members of the International Committee on Global Navigation Satellite Systems (ICGNSS) that was founded to ensure global interoperability of navigation satellite networks.

China has also not yet completed frequency coordination with the other ICGNSS member nations including the U.S., Europe, Russia and others. According to Space.com, Chinese officials said at the Toulouse Space Show that China’s global Compass/Beidou system would be fully compatible with the U.S. GPS, European Galileo, and Russian Glonass global navigation constellations.

Japanese officials are concerned about the Chinese Asia regional system because Japan is developing its own regional system called the Quazi Zenith Satellite Systems which will have three satellites in a highly elliptical orbit with an apogee over Japan and Asia. According to Satoshi Kogure from the Japan Aerospace Exploration Japanese Agency some in Japan feel the Chinese navigation satellite system is an important issue for Japanese national security.

The head of the Galileo unit at the European Commission financing the development of the Galileo constellation notes that when the U.S., Russian, Chinese and European medium Earth satellites are added together there could be 120 operational navigation satellites in medium Earth orbit.

The Chinese satellite system will also reportedly include an encrypted channel, presumably for use by the Chinese military.



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RE: "G"PS
By FITCamaro on 5/8/2008 3:07:03 PM , Rating: 1
The US GPS system is also getting a bit dated.

As far as us turning it off for others, doubtful that it will ever happen unless we are at war with said country.


RE: "G"PS
By KristopherKubicki (blog) on 5/8/2008 3:48:38 PM , Rating: 2
quote:
The US GPS system is also getting a bit dated.

This just isn't true. The US has 58 GPS satellites, and since 2005 it already launched 6 L2C birds.

GLONASS, probably the next best system, is sort of a hybrid of Cold War satellites, with 14 current generation birds, 7 much older satellite sand a few spares.

Single band resolution:
GPS: 15 meter horizontal resolution
GLONASS: 57 meter horizontal resolution
Galileo: 15 meter horizontal resolution

Of course, when you take into account the L2 band (which will be added to GLONASS and Galileo, someday...) and multi-signal processing, the *civilian* bands of GPS do sub-1m resolutions.

Just cause we have lots of stuff flying around up there doesn't mean its dated. :)

Makes you wonder what sort of insane capabilities the 33 IIF Air Force satellites are going to add to military-only GPS when they launch next year.


RE: "G"PS
By sapster86 on 5/8/2008 4:50:14 PM , Rating: 2
Using RTK corrections it possible to achieve +-3cm in real time using GPS.


RE: "G"PS
By FITCamaro on 5/8/2008 5:21:27 PM , Rating: 2
I wasn't trying to knock our GPS.


RE: "G"PS
By Apoxie on 5/8/2008 6:31:13 PM , Rating: 2
Galileo starts with both bands, so you can drop the someday...

The free of use service will achieve an accuracy of <4 m horizontally and <8 m vertically if they use both OS bands.

The fee based encrypted service will offer an accuracy of better than 1 m.

But its strange that China now wants their own system. They are already a partner in the Galileo program and paying for it.


RE: "G"PS
By Ringold on 5/8/2008 9:36:19 PM , Rating: 2
They're probably trying to ingratiate Europeans. If the bombs start to fly, however, they don't want to rely on American signals, as we are a likely target, and they don't want to rely on Europeans, because, beyond being a supposed US ally, they wear their morality on their sleeve and could do something stupid, like shut down the system to avoid it being used in conflict.

Thus, I can see why China, and any other respectable power, may want one.

I still don't see why Europe would want one; their security completely relies on the blank check of US support by way of NATO. They're too weak to act alone, so if they ever crawl out of our bed they'd have to crawl in to some one elses who would likely have a system of their own as well.

Well, actually, I do know why Europe wants one, but I mean a reason other than pride.


RE: "G"PS
By SiN on 5/10/2008 12:12:54 PM , Rating: 2
We have the best special tactical unit in the world at present, the SAS, Bristish. We have a joint venture into trade with one another and security.

The EU is not weak; United Kingdom, Sweden, Spain, Slovenia, Romania, Portugal, Poland, Netherlands, Malta, Luxembourg, Lithuania, Latvia, Italy, Ireland, Hungary, Greece, Germany, France, Finland, Estonia, Denmark, Czech Republic, Cyprus, Bulgaria, Belgium, Austria. Add in Turkey Croatia and The Former Yogoslav Republic of Macedonia when they fully join.

Why do people say the EU is weak. We do not supply china with weaponry due to a treaty which cam eunder scrutiny recently due to Chinas wish to buy weaponry from Germany.

The EU defence budget is 311,920,000,000 Euros (2007) ,2008 USA =583,283,000,000 Euros, 2008 China =59,000,000,000, 2008 Russia =40,000,000,000 Euros

It gets to me how people play down the EU defence.

We also have the Eurofighter Typhoon, although the F22 is better.

Given we could be easily wiped out by nukes.

EU Active Military Personnel = 1,582,605
Add in Turkey the total becomes = 2,097,445
USA = 1,426,026
China = 2,255,000

But then again, we aren't interested in war. We are interested in development, trade, technology and Defence. And trade future is with eastern europe (Russia, China, India etc...)


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