Posted on 03/01/2004 2:00:58 PM PST by anymouse
The European Space Agency and the EU have decided to build a satellite navigation system, similar to the US Navstar/GPS system, called Galileo. Publicly, they claimed that they were doing so because they distrusted the US, and feared that the Pentagon might somehow disrupt the GPS signal. They also claimed that they needed to build this system in order to protect Europe’s independence from the US. Their plan, as it now stands, is to launch two test satellites that will begin transmitting, on frequencies allocated to the Europeans by the International Telecommunications Union, in 2006. In 2008, they hope to begin launching the first of 30 operational navigation satellites.
The just announced agreement between the European Union and the US concerning the frequencies to be used by Galileo has been portrayed as a win-win solution. In fact, it is an almost total victory for the Bush administration and a serious defeat for France’s long-term effort to create a European military organization rival to NATO. Other European states, especially the smaller ones, had no desire to drive yet another nail into the coffin of US-European friendship. Few governments in Europe wish to surrender their long-standing ties to America in order to propitiate France’s dream of European hegemony.
American military forces depend on GPS in almost every aspect of their military operations. GPS timing signals are used by almost every communications system in the Pentagon’s inventory. Just a few years ago, France was counting on the so-called “frequency overlay,” to force the US to either jam its own GPS signal in order to deny its use to an enemy or to have to ask permission from a European Commission body in order to conduct military operations anywhere in the world. The frequency overlay would have given the French a sort of a veto over US national security policy.
At first, the US hoped to persuade the Europeans not to build Galileo, but the French were able to make enough of a stink about US interference so as to convince the other European governments to go along. They also agreed to have most of the work for the system done outside France, even while paying the lion’s share of the cost. In typical French fashion, they are willing to surrender their own taxpayers’ and workers’ interests in order to inflict what they hope will be harm on US hyperpuissance.
After the US realized that the Galileo system would probably be built, the Bush administration decided to concentrate on reducing the harm that Galileo could do to GPS. After many long and tough negotiating sessions, the EU agreed to move the quasi-military coded Publicly Regulated Service (PRS) signal to a place on the radio band where it would not interfere with the US plans for a new military signal, called M Code, that will be broadcast by the GPS -3 constellation, to be launched by the US by the end of this decade or thereabouts.
The rest of the agreements have now fallen into place and, in exchange for an essentially meaningless US agreement not to demand a veto over Galileo operations, the Europeans have given in to the US on all major issues. The EU has agreed to move the common signal, which is comparable to the open GPS one used by hikers, truck drivers and the public at large.
This is an unalloyed triumph for the Bush Administration and for Colin Powell’s State Department. It shows that sometimes, America’s diplomats are capable of being just as hard-line and as tough as her military. It is to be hoped that this example will be emulated by others in the department, whose reputation for ferociously defending America’s global interests is not quite as stellar as the one the Bureau of Oceans, Environment, and Science has now acquired.
Galileo will probably now go ahead, though the French may lose their enthusiasm for funding it. The idea that European private enterprise will make a legitimate capitalistic investment in the system was never really in the cards. Today, the Europeans are trying to get nations such as China, Israel, and Brazil to join them in building Galileo while, at the same time, promising never to allow these partners access to the militarily useful signals. Over time, it could become a useful adjunct to GPS. If the public signal can be refined to a one-meter accuracy, then it could become an extremely valuable tool for subsistence farmers in the developing world. Of course, this would require the development of simple electronic receiver/mapper/calculators for precision agriculture but, given the demand and the potential of such devices, they will surely be designed and built over the next few years.
In the end, GPS and Galileo could make a serious contribution to the struggle against world hunger, and that would be far more important than France’s effort to inflict some minor harm on America’s global power. Meanwhile, it will be interesting to see how, or if, the Pentagon budgeteers will capitalize on this State Department success by accelerating the development of GPS 3.
He shot the sun again and plotted his position again. Same result. After quite a frustrating time, he noticed he had a French chart and it considered the prime meridian to be Paris.
By standard every other navigation system uses Greenwich, England as the prime meridian, but the French could not stand that, so they replaced Greenwich with Paris, throwing all of the French charts off by about 180 miles. Ya gotta love em.
Why do Frogs jump when you poke them in the butt?
What the hell is precision agriculture? Do you need 1 meter resolution on a corn field?
This lost me ---- I need some GPS co-rds.
The problem was, all you had to do was stick a fixed GPS receiver down, survey it's exact location, and then broadcast the observed deliberate errors on a second radio frequency. GPS receivers getting this error correction are called DGPS, Differential GPS. It's accurate to about 1 meter.
Bottom line, SA was useless militarily.
What's going on now are new "dual frequency" receivers that recieve the military frequency. They don't actually decode the data (it's still encripted), but they do lock onto the carrier frequency and track it, increasing DGPS to about 10 inch resolution.
And THEN... You analyse the signal over a short time, and compute a more precise location, and lock onto both C and P carrier frequencies (which are affected differently by disturbances in the ionosphere) and track their changes, and you've got RTK (Real Time Kenimatic) that does about 2cm accuracy.
Or, something like that.....
That 2cm was doable several years before they did away with SA, so the deliberate error in C code was pretty useless.
I really do not get this! Why would the Euroweens spend millions, perhaps billions for a service they can get for free? I was shocked when they declassified the P(recision)-code. It used to be encrypted until about 5 years ago. But then you could still get the C/A (Coarse Acquisition) anyway. The P-code can surely be used by anybody for weapons...and being a good receiver costs a whopping $300 it really makes no sense unless it is just a way for the Euro freaks to waste taxpayers money for bragging rights of some sort.
Your answer is in the article:
France was counting on the so-called “frequency overlay,” to force the US to either jam its own GPS signal in order to deny its use to an enemy or to have to ask permission from a European Commission body in order to conduct military operations anywhere in the world. The frequency overlay would have given the French a sort of a veto over US national security policy.
It's not about one upsmanship. It's about screwing with our critical systems to try and damage us. France sees themselves as our enemies and wishes to damage us so that they can reclaim their "rightful place" as a world superpower.
"Oh, but France is America's friend. Remember, we saved you in your Revolutionary war!" Wrong. The French monarchy wished to damage their rivals, the British. Helping us hurt them. They (and the British) also sought to help the Confederacy to stymie what they saw as an upstart rival. Classic European Machiavellian politics The same politics that gave us both World Wars, the Middle East, The lovely situation between Hindus and Muslims on the Indian sub-continent, all of the joy that is Africa, etc. Oh, and they have infected the UN, as well. Oh goody. I say we pull a Lucrizia Borgia on them and be done with them. Anybody got a ring handy?
That's what I do for a living. Write software to guide drivers with GPS, or actually drive farm vehicles with GPS. Even with only 1meter resolution, it's awfully handy during fertlizing with liquid spray or dry fertilizer, because you can't see the track of where you've been in a huge field. It's very easy to get "lost".
You can use GPS to generate field "perscriptions" that vary the amount of fertilizer, saving money and reducing fertilizer runnoff.
John Deere actually has the best justification for GPS auto-steer. They document that you can drive faster in a field, which saves labor money, reduces the number of tractors required, and even saves fuel costs.
Lookup our competitor here: http://www.beeline.com.au/
It's not that kind of radio signal. It's not using ionosphere bounce or scatter. It's a direct line of sight signal multiple birds for your local computer to do the calculations. If the Galileo system overlaps our frequencies they have the ability to screw with our frequencies. They were primarily hoping to occupy the new frequency spectrum that our 3rd generation military GPS was meant to use. They wanted squatter's rights to screw with us.
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