GPS vs. Galileo; Where Are They Headed? 330
ben_ writes "This keynote speech from the recent European Navigation Conference talks about the history between the US military's GPS and the proposed EU Galileo system, as well as where they're both going. Interested in how you know where you are and what's going to happen to those satellites?"
Where are they going? (Score:4, Funny)
Re:Where are they going? (Score:2, Funny)
Re:Where are they going? (Score:2)
Re:Where are they going? (Score:2, Informative)
Re:Where are they going? (Score:3, Interesting)
Re:Where are they going? (Score:2)
Re:Where are they going? (Score:2)
Only in a relative sense. The satellites in "geostationary" orbit are still moving, making one complete orbit every 24 hours (else they would fall back to earth), it's just to a person standing on the earth (which is also moving) there is no apparent movement.
Re:Where are they going? (Score:3, Insightful)
Re:A Relativity Question (Score:3, Interesting)
Re:Where are they going? (Score:2)
Re:Where are they going? (Score:2)
Others already mentioned that the standard GPS constellation is at a mid-level orbit (about 20,000km altitude). In addition, there are two GPS satellites in geosynchronous orbit, providing WAAS coverage. While they are fixed in the sky, they are still going in circles about the Earth with a period of 24 hours.
More NAVSTAR GPS information (Score:5, Informative)
NAVSTAR GPS Joint Program Office [af.mil] - responsible for operational maintenance of NAVSTAR GPS equipment, services, and infrastructure
Interagency GPS Executive Board [igeb.gov] - executive management of NAVSTAR GPS
GPS fact sheet [af.mil] - US Air Force facts about NAVSTAR GPS
US Naval Observatory NAVSTAR GPS home page [navy.mil]
Further information:
FAS GPS background info [fas.org]
Global Security GPS background info [globalsecurity.org]
Re:More NAVSTAR GPS information (Score:3, Informative)
Essential to Ending US Dominance (Score:4, Insightful)
Until the EU has an alternative, it's military (should it form one) will be at a severe disadvantage in a theoretical conflict, and potential power in a theoretical conflict is a major bargaining chip. (It's a chip that's not talked about, but people pay attention to it on their own.)
Re:Essential to Ending US Dominance (Score:3, Interesting)
So much for "ending US strangeholds".
Re:Essential to Ending US Dominance (Score:2)
You know, the US military didn't *have* to allow everyone (including it's enemies) to use GPS at all?
"All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, the fresh-water system and public health, what have the Romans ever done for us?"
Re:Essential to Ending US Dominance (Score:2)
Reading an offline version of this story, it was said that the US threatened to reintroduce Selective Availability over the EU unless the EU allowed them the ability stated
Re:Essential to Ending US Dominance (Score:2, Insightful)
There would also be a lot of uproar from businesses/individuals unless there were very good reasons for the war. Otherwise, the PR would be very damaging to the government, which they would try to avoid unless there was a 2nd-term president or something.
On reflection, I suppose that the US could turn off just a few of the satellites, disrupting service in a more or less contained region.
I have also heard of GPS jammers, but anyon
Re:Essential to Ending US Dominance (Score:2)
As best I know, wrong. The US can selectively cut off GPS. I was under the impression they could do it on a very fine-grained level, but they can at least do it by region (turn off satellites over the area, but leave on ones elsewhere).
Re:Essential to Ending US Dominance (Score:2, Insightful)
Re:Essential to Ending US Dominance (Score:3, Insightful)
And maybe...just maybe... those satelites have a little clock on board and a microcontroller that can be programmed....
Jeroen
Re:Essential to Ending US Dominance (Score:5, Informative)
So the US can degrade the signal in a fine grained way, without affecting military / government systems.
--
Phil
Re:Essential to Ending US Dominance (Score:2, Interesting)
However, know that this option hasn't been used in at least the past 3 years. (I k
Re:Essential to Ending US Dominance (Score:5, Informative)
It can be turned off selectively. Furthermore, as I understand it, "turned off" only means that the unencrypted data stream is gone. The military has the keys to the encrypted stream, so their GPS units still work.
I have also heard of GPS jammers, but anyone could use those, so that would effectively negate the US's GPS advantage.
GPS jammers are nearly useless. They are only powerful enough to cover a small area, so their only use is to protect a stationary target from attack by GPS guided bombs. Unfortunately, as demonstrated in the Iraq war last year, they don't even do that effectively. All six of the Russian-made GPS jammers fielded by Iraq were destroyed in short order, some of them by GPS guided missiles!
Re:Essential to Ending US Dominance (Score:2, Interesting)
What's the likelihood that someone hasn't scored a military unit and reverse engineered the encryption key? I'm very curious about that as it sounds like a security measure that is strong in theory, but weak in practice.
All six of the Russian-made GPS jammers fielded by Iraq were destroyed in short order, some of them by GPS guided missiles!
Indeed - by the time the guided unit was in range of the jammer, the accuracy of n
Re:Essential to Ending US Dominance (Score:4, Informative)
The EU system will also provide "additional commercial services, on a user-pays basis." That could be good too, but the basic "where am I now" function of GPS works fine for me. I'm leery of a govt body stacking commercial features on to a pretty well proven system.
"Galileo thus requires US cooperation for its commercial success, while at the same time apparently threatening US national security and industrial advantage!" To which I say Bah! Unless the US has really been dragging its heels in cooperating, I say, build your nav sat system and go for it! Our (the US) present obsession with security is mostly the work of a paranoid few. Let the US take care of itself and power to the EU for whatever they can do.
Sure, there may be a few Pentagon types who might drag their feet, but the timing and communications methods aren't rocket science... and even the rocket science part can be easily handled.
Re:Essential to Ending US Dominance (Score:5, Funny)
That's right, they get a +5 accuracy on all medium and long range weapons.
Re:Essential to Ending US Dominance (Score:5, Interesting)
1. Someone more intelligent than Putin takes over Russia and uses Putin's communist-like infrastructure to once again impose a military state.
2. China decides that they have the most people in the world and that someone else should give up some land to support them.
While the second is more likely, either one would spell defeat for the European Union. Only the US currently has the necessary military power to stop another superpower. On the upside, China might be more inclined to take on the US first since we have more undeveloped land. It wouldn't be much of a war though. We'd fight until the Chinese start lobbing nukes. Once that happens, China can kiss their population goodbye when a few neutron bombs fall.
Re:Essential to Ending US Dominance (Score:3, Insightful)
Re:Essential to Ending US Dominance (Score:3, Interesting)
Re:Essential to Ending US Dominance (Score:2)
Welcome, would you like to play a game?:
(now how do you win?)
Re:Essential to Ending US Dominance (Score:2)
What of it? While most of the infrastructure would be destroyed, we'd still have enough knowledge to build new generators, hydroponics, etc.
Re:Essential to Ending US Dominance (Score:2)
China doesn't actually have all that many.
Fallout is a potential issue, but should be largely restricted to the Northern Hemisphere by prevailing weather patterns, and is lessened in significance by airbursts, which would NOT be used in a counterforce strike (which wouldn't kill very many people, since the silos aren't in cities), but WOULD be used in a strike against the population of the world (since it kills so many more people per bomb).
And nuclear winter should nicely cancel out global warming, so wh
Re:Essential to Ending US Dominance (Score:5, Insightful)
Vlad Putin is a VERY smart guy. At the moment he's busy wresting control of the country back from the cowboy capitalists that Yeltsin and the IMF sold its natural resources to (as in 100 people own 1/4th of the country's wealth). This needs to happen before re-establishing the military's dominance can take place. The symbolism is already pointing that way, what with the red star being restored as the symbol of the Red Army, and the national anthem reverting to the Soviet one (but with new words). This is why eastern europe is so keen to join NATO, as they know very well that Russia the superpower is just taking a timeout...
2. China decides that they have the most people in the world and that someone else should give up some land to support them.
Ummm, China is very far away from Europe. If they want land from someone it'll be Russia....
Re:Essential to Ending US Dominance (Score:3, Insightful)
You should also bare in mind that the USA does not want anyone else to have a good military, so it is for instance trying to stifle a pan-European military force. So it's not a case of the Euros not wanting a strong military, it's a case of the USA preventing the Euros from having one.
Re:Essential to Ending US Dominance (Score:3, Insightful)
Suppose that once the oil starts to run a little short, a dictator who has contracts to supply oil to America invades the country of a dictator who has contracts to supply oil to Europe. The Americans would greatly prefer that dictator A could liberate country B from the tyranny of dictator C, without the brave freedom-loving people of country B having access to British tanks and Ge
Re:Essential to Ending US Dominance (Score:2)
Re:Essential to Ending US Dominance (Score:2)
By applying political pressure.
Re:Essential to Ending US Dominance (Score:5, Insightful)
2: The Russians storming west is more likely than (1), which isn't saying much. The Russian conventional army is really not what it used to be, after years of underfunding. A hypothetical Russian dictator would need to rearm a whole lot to make an invasion of Europe a practical proposition, and that would take a long time. Time enough for the Europeans to get their act together - note that most of Russia's former Warsaw Pact allies are now in NATO and the EU. In any case Russia is turning into a capitalist state like no other; they're more likely to see the EU as a huge, rich market on their doorstep, rather than as an opportunity for a scrap.
3) is just nuts. China decides to invade the EU for extra space? Picking out just about the only place on the planet more crowded than China itself? Entirely barmy. The only place China could realistically look for lebensraum is Siberia, and, er... well, I said the Russian conventional forces were not what they were, but that was an outlandish proposition when Tom Clancy tried it out, and it's no saner now.
If I was a European military planner I'd be worried about the dodgy nations on the doorstep, rather than the three other big players. Belarus, for instance, is ruled by a complete and utter fruitcake dictator. And as we expand we'll have more neighbours like that - if Turkey joins up we'll have Iraq right on the EU frontier. That's the sort of thing we'll need to be thinking about.
And as the expanding EU bumps up against such difficulties, we may need to conduct our own military operations, probably without American support - and sometimes, I would imagine, with outright opposition from Washington. That's why we need our own GPS-equivalent. It would be, at the very least, a diplomatic embarrassment to launch a war of which America disapproved, while relying on America's satellites to guide our missiles ;-)
Re:Essential to Ending US Dominance (Score:3, Insightful)
Russia's had a military force, but the only thing holding it up was the desire of the people to reap the rewards of becoming communists party members. Obviously there was some patriotism, but it was far from a deciding factor in anything but defense.
That's a question of motivation. Of course any soldier, conscript or professional, fights harder when he's defending his homeland than when he's on some empire building mission. Do you think that morale in the EU armies would be high if we would embark on so
"major superpower" ?? (Score:2)
Re:Essential to Ending US Dominance (Score:2, Interesting)
First off, the US can't just block out who they want with GPS, that is the beauty of it, it's a one-way connectionless communication protocol, it is either OFF or ON. Second, the US would NEVER, EVER turn OFF gps, we have much more riding on GPS than anyone else. Third, our only control over GPS at this point is Selective Availability, which besides having a presidential and congressional mandate to never turn ON again, it is completely useless with today's technology. Any corrupti
Re:Essential to Ending US Dominance (Score:5, Informative)
the GPS system CAN be turned off or rendered pretty much useless for anyone except the US troops. the DOP can be adjusted from zero to insanely high for non-military units. (DOP is dilution of Precision) I work with a guy that just came back from NORAD and his main job was dealing with the GPS systems. (Luetenant who is back only to gather his things and return back to full active duty due to an offer from the military he could not refuse)
the non-classified things he was able to tell me is that the DOP can be adjusted a very wide range to the point that even DGPS can be rendered pretty useless unless both recievers were in very close proximity.
if anyone ever thought that a military system would not have the ability to be disabled for all but military use they are horribly mistaken. the lives of the service men on the ground and the sucess of a mission is much more important than some businesses using it for navigation.
SA can be turned back on at any time if it is needed.
Re:Essential to Ending US Dominance (Score:2)
Re:Essential to Ending US Dominance (Score:2)
See http://www.eurofix.tudelft.nl/dgps.htm for details.
Re:Essential to Ending US Dominance (Score:3, Informative)
Also, DGPS only works when the L1 frequency is on. This frequency could conceivably be turned
Might want to check your facts... (Score:2)
Of course, 2-frequency phase tracking receivers cost a fortune (well, not by military standards...). In addition, it takes a certain amount of time to resolve ambiguities, which is even harder when you're moving (ie, a missile) and even harder when you're moving fast. And should a cycle slip occure, you have to start all over again, not something very
Re:Essential to Ending US Dominance (Score:2, Insightful)
SA can be turned on for specific geographic areas, so for example, Iraq and the general area around it had SA turned on in the recent conflict.
The satellites have synthetic aperture antennae, so could quite easily be programmed to drop all signal to specific areas. It is fairly 'crude' in the sense that the areas of no signal do not map to exactly a country's border. The technique is quite fancy in that you have to change the beam footprint of all the satellites continuously as they
Re:Essential to Ending US Dominance (Score:2)
Terrorists who can get their hands on large missles are also at a severe disadvantage.
If the EU is worried about the military disadvantage, they should develop a system similar to GPS for their military. But they're not. They're developing a "civil" system.
The US isn't all that worried about the EU having the capability, they're worried about an ICBM w/ New York City's name on
Re:Essential to Ending US Dominance (Score:2)
Re:Essential to Ending US Dominance (Score:2)
No, the US is worried about an ICBM w/ New York City's name on it originating from North Korea and riding the Galaleo navigation system all the way even though the US saw the launch and disabled its GPS systems.
Re:Essential to Ending US Dominance (Score:3, Insightful)
Actually, They're worried about cruise missiles, not ICBMs. ICBMs don't use GPS, they use ballistics.
Re:Essential to Ending US Dominance (Score:2)
This is true. The Tomahawk pre-dates GPS by a number of years. The thing about terrain-mapping and inertial guidance systems is that you can't just buy one, pop it into a home-made cruise missile, and send it on its way. For o
Re:Essential to Ending US Dominance (Score:2)
If they can't use GPS to guide it, they'll use something else. Besides why would they need to use a missle? Pack a car full of explosives, park close to target, set timer and move to a differend country. Much simpler than obtaining and using missles. Plus you can pack a whole lot more explosives in a van.
Re:Essential to Ending US Dominance (Score:2)
automatic bonus? +1 to hit, or is it a +1 bonus against undead, europeans, and werecreatures?
Re:Essential to Ending US Dominance (Score:2)
Why repeat yourself?
Re:Essential to Ending US Dominance (Score:2)
Or as he may have written
Itz uh dam pour mined thaht kin ownlee thinc uv won weigh two spel uh wurd.
Why the US won't kill the signal (Score:3, Interesting)
Look at how many commerical GPS units there are, and how many military ones.
The ratio will be at least 3:1. The military GPS units, in a word, suck. They are about as big as a small boombox and fail for various reasons every 5 minutes. Ask any soldier who's had to use one in a combat environment. They will tell you that anyone who actually cares about finding out where they are will buy a Garmin.
That's why the US stopped degrading the signal and won't do it again.
Re:Why the US won't kill the signal (Score:3, Informative)
That's quite true. I've seen $99 yellow Garmin devices that were used to call down JDAM strikes on Taleban targets. The US Army had this elaborate "21st Century Force Digitization" plan in the works, but they're pulling back from it because the men are creating better capability on their own from civilian COTS electronic gear.
Factoid 2: Today, all US warfighter pilots have GPS build into their avionics (and augmented by inertia
Re:Essential to Ending US Dominance (Score:3, Informative)
In spite of the advantage that SA theoretically gave us, it was turned off in both Iraq Wars. First time, because not enough milspec GPS receivers were available, second time because it had been turned off years before by Clinton, and it was no longer practical to disable
Re:Essential to Ending US Dominance (Score:3, Informative)
Competition vs monopoly (Score:3, Insightful)
Re:Competition vs monopoly (Score:5, Insightful)
Just look at US cell phone companies (Score:2)
Re:Competition vs monopoly (Score:2)
We can't us the EU system (Score:4, Funny)
Problem: Hmmm, Ive got 100 kilometers to my destination and 15 gallons of gas. I am driving an Hummer H2, that gets 9 miles a gallon, can I make it? Solution: It doesn't matter, the H2 can't drive around the corner before needing a refuel.
Re:We can't us the EU system (Score:3, Informative)
Re:We can't us the EU system (Score:2)
And a meta-troll shows its head. Doppler shift! Very good try. I salute you.
Re:We can't us the EU system (Score:2)
Hmmm, Ive got 100 kilometers to my destination and 15 gallons of gas.
Litres, sir, Litres.
I am driving an Hummer H2
Robin Reliant, Ithinkyoumean. If you're going to use Metric, you've gotta learn to think European.
Re:We can't us the EU system (Score:2)
Maybe I missed something (Score:3, Interesting)
Does anyone know what this refers to?
Re:Maybe I missed something (Score:2)
Re:Maybe I missed something (Score:2, Insightful)
makes me wonder (Score:3, Interesting)
Re:makes me wonder (Score:5, Informative)
They're in on Galileo: see here [eu.int]
Re:makes me wonder (Score:2)
Link to older Article on Slashdot (Score:4, Informative)
Galileo System To Include Jamming Capability [slashdot.org]
Here's the big question: (Score:5, Interesting)
That could get VERY expensive as manufacturers of satellite navigation receivers will have to accommodate both systems for airplanes, automobiles, trucks, boats, etc.
Re:Here's the big question: (Score:3, Insightful)
The basic GPS components are already ridiculously cheap. Most of what you're paying for with a GPS unit is the mapping/tracking software. The "GPS" portion of it is just an antenna and a few
Re:Here's the big question: (Score:2)
What might fall out of all this is a system that uses signals from BOTH constellations of satellites, and compares them for even better accuracy, and then in the case where one system might go down (for instance, if an enemy or a natural disaster like an interplanetary dust storm or massive solar flare) were to disable one system, it would autom
Don't forget about the Russians: GLONASS (Score:5, Informative)
Here is a technical comparison [chalmers.se]. They seem more alike than different to me.
I know of a few very high-powered geologists who cross-check GPS with GLONASS. Having a third system would seem to only help.
Re:Don't forget about the Russians: GLONASS (Score:3, Interesting)
OTOH, a friend in Russia uses a Garmin!
working together (Score:2)
one aside is I would like to get the reciver in the Magellan 3xx seraries form factor.
This could also be a benefit (Score:2, Insightful)
redundancy (Score:5, Insightful)
This is also about global redundancy. The world increasingly depends upon navigational technologies like this. It's a little dangerous that there's only _one_ point of failure (whether technical, economic, political, etc).
Another instance of trying to be independant (Score:3, Informative)
Just like China wanting to be independent technologically [slashdot.org], the EU also does not want to be dependant on the USA.
Read the FAQ [eu.int] where it says one of the objectives is just that:
One small problem I can see ... (Score:2, Funny)
The speeding tickets alone are going to kill me.
Will it ever get built? (Score:2, Interesting)
Thomas Jefferson and Our Cultural Differences (Score:3, Insightful)
But alas there is this remark:
Alas, this cultural difference has been with us at least since the days of Thomas Jefferson and those earlier terrorists, the Barbary Pirates. European nations paid off the pirates rather than fight. Under Thomas Jefferson, the U.S. had a policy, "Millions for defense, but not one cent for tribute." It seems someone has posted more about that history at:Barbary Pirates [zianet.com]
Then as now, Europe thinks being nice to nasty folk is a better than getting tough, sending out the frigates, and making them behave. Hence their policy of leaning toward the Arabs. In contrast, the U.S. supports feisty little Israel, perhaps the only nation in history to fight four major wars in one lifetime with foes that outnumber them twenty to one and win every one. We back a democracy and a winner. They (particularly the French), back repressive dictatorships and losers.
In that context, it helps to remember what Churchill warned in 1939 after the Munich Agreement, "Britain and France had to choose between war and dishonor. They chose dishonor. They will have war."
In the end, every people gets the government they deserve. If the Europeans have so little sense of 'honor,' that they cannot defend their free and democratic societies from an ideology driven by hatred and revenge, then perhaps they deserve to drop into history's dustbin, always knowing precisely where they are thanks to a Galileo that will never be turned off to fight terrorism. And in their obsession with not fighting a few brush wars, they may lose a far greater and more critical cultural war. Europe may become Eurabia. In a generation, European women may only leave their homes clad in a sack from head to toe.
Am I the only one to catch the madness of all this? For perhaps two decades we've been told that there was a 'religious right' or 'fundamentalism' spanning from Jew and Christian to Arab that is a threat to free and democratic societies. But when push comes to shove, when religiously sanctioned terrorism and repression must be fought, it is the secular left who apologizes for religious repression and who wants little or nothing done to open up brutally repressive Arab societies. The left of western democracies is defending Saddam with all the zeal they once had for cruel Stalin.
All this brings to mind the Chinese proverb about the curse of living in "interesting times."
Mike Perry, Inkling blog [inklingbooks.com], Seattle
Re:Thomas Jefferson and Our Cultural Differences (Score:3, Insightful)
The US did just as much to stop the Nazis as europe. That is to say, nothing until they where attacked themselves. The only people who deserve any credit for actually joining the war even though they didn't really have to (at that point in time) are the Britts (of course it was inevitable that they'd have to join eventualy since Hitler was a fruitcake).
Re:Once this is in place (Score:2, Funny)
Re:Where ever they are going... (Score:5, Funny)
Yup, broadcasting through hundreds of feet of rock would probably end up cooking everything on the surface
Re:Where ever they are going... (Score:5, Funny)
Mind you, a did see a documentry about the spielologists retained by the city of Naples to try and map it's enourmous network of caves and tunnels. These people keep turning up unexpectedly in peoples basements!
Re:Where ever they are going... (Score:2, Interesting)
I understand that there would need to be some sort of receiver but it seems like this would be an issue of cost, not feasibility.
You would want these devices to be working 100% of the time, right? What if your kid has gotte
Re:Where ever they are going... (Score:2, Insightful)
Now, maybe if you equipped your son with a set of orbiting satellites and got a receiver to pick up the signals you would be in business.
Re:Where ever they are going... (Score:4, Insightful)
Forget it, man. You can't get EM radiation through solid rock from orbit. At least not without a lot of power, and then you're frying everything on the surfac. Wishing for an underground-capable GPS is like wishing for a lighthouse you can see through the hull of your boat. It's asking too much.
Re:Where ever they are going... (Score:2)
Cave explorers could get by on an inertial guidance device but the market is a little too small to make such a product worthwhile. For now they'll have to stick with chalk.
Re:Where ever they are going... (Score:2)
Re:Why?? (Score:2)
Re:More 'open source'? (Score:3, Insightful)