First modernized GPS satellite Launched 221
A reader writes "The first GPS 2R-M satellite has launched from Cape Canaveral, Florida on top of a Boeing Delta 2 rocket. The government is now competing with Europe's Galileo system, and has added two additional military channels and one civilian channel, which will increase the accuracy and performance of GPS - as well as increase its resistance to jamming."
You Will Be Assimilated! (Score:5, Interesting)
Then I saw the borg cube that assimilated the Willy Wonka Chocolate Factory [lockheedmartin.com] (Mirror [nyud.net]) Excuse me while I pick my jaw up off the floor.
On another note, the picture makes it look like the design hasn't changed much from the original NAVSTAR [wikipedia.org] configuration. I assume that these satellites are merely sharing the same chassis, and have very different internals?
Compatibility (Score:3, Interesting)
Re:Compatibility (Score:5, Interesting)
What I have to wonder, though, is what will they do with the two new military channels? It seems that all the field soldiers tend to use civilian gear because the military gear is too heavy, unfriendly, ugly, and is in short supply. I suppose it would make the missiles hit their targets better, but it would be nice to know that our entire military can use the equipment.
Re:You Will Be Assimilated! (Score:3, Interesting)
Signal jamming==profit (Score:2, Interesting)
1. Launch GPS satellites and sell lots of GPS devices
2. Launch jamming satellite (last week news)
3. Launch new GPS satellite system which is less prone to jamming
4. Sell new receivers => profit!
Re:You Will Be Assimilated! (Score:4, Interesting)
OT... something I've been wondering about, with regard to long-range communication with satellites: we know how to do networks now, why aren't we peppering space with small node probes that travel away from Earth (i.e. aren't orbital satellites) but keep in touch with eachother and so can route the data from real science probes back to us from further and further out?
I suppose the number of nodes required would grow at the same order as the volume of a sphere (assuming we want to spray them in all directions) but we actually probably only want to send them out in specific directions.
Re:Look everyone! Somone who didn't RTFA! (Score:4, Interesting)
Then again, I'd like to see a day when we can create useful PongSats [parallax.com], for this stuff but I supposed that won't be happening anytime soon. (Especially not when you need a large tranceiver!)
Re:which # (Score:2, Interesting)
From the designation of the old satellite, I presume that this position is number 20 on GPS receiving equipment. Just a guess.
By the way, does anybody know how they plan to move the old one out of the way? According to info found here [astronautix.com] the origional was a 3-axis stabilized NAVSTAR, but I doubt it will be able to move significantly with only its thrusters.
Another interesting point: the page lists the design life of this series at 7.5 years. Which means this satellite was replaced a mere 4 years, 10 months, and 13 days beyond its expected service life.
Specs? (Score:3, Interesting)
Re:You Will Be Assimilated! (Score:3, Interesting)
No, they're substantially different designs. Different manufacturers even (Rockwell vs Lockheed). But if you have a spacecraft performing the same mission, odds are it's going to have a similar configuration. The thing that makes them look most similar is the navigation signal antenna array (the "Willy Wonka Chocolate Factory"). Even those are slightly different between the two models. But since they're fundamentally performing the same function, thye look very similar ("form follows function").
Re:Specs? (Score:4, Interesting)
Re:You Will Be Assimilated! (Score:3, Interesting)
your statement is naive in that it supposes that mil-spec and rad-hardened technology has advanced at the same rate. Once, it was the military who led the way and consumer devices followed; now, it's the other way round, and in fact the military/space people have big problems with obsolescence, especially with the recent EU rules on Reductions Of Hazardous Substances (often known as "lead free", but actually covers other things as well). In some instances, military kit is being forced to use automotive-spec components as replacements, because that's all that's available and at least the devices have a wider temperature range.
so, yes, mil- and space-spec hardware is advancing, but the testing cycle is far longer - think months rather than weeks. when you're spending $M's in launch fees, you've got to get it right!
Russians using GPS (Score:3, Interesting)
Thad Beier
Re:Jamming by whom? (Score:3, Interesting)
No, all that would do is present multiple individual targets. Modern direction finding equipment uses such advanced digital processing that it can separately identify two transmitters right next to each other based on subtle differences between them caused by things like inherent manufacturing variations in the transmitters' modulation circuitry.
How soon? (Score:3, Interesting)
Television as GPS (Score:2, Interesting)
Re:I see jamming in action regularly (Score:3, Interesting)
1) He might not know it is there
2) The jamming dish (or array of jammers) is presumably far away from any critical installation. If the military managed to radio mark their own targets, I'd classify that as gross incompetence. (also, that'd be "the jamming signal itself")
3) "Simply"? Yes, you could make a system that would try to determine a "last known good position/direction", calculate direction and distance to target and fly it in blind, but it'd be a rather major modification. A much more likely scenarion is that someone gets their hands on a GPS-guided missile (american, russian, whatever), program it up with coordinates and launch it only to fail miserably.
4) Who's to say the system can't actually deflect missiles? Instead of going wild (that's just the default state), an incoming missile detected on radar can be "redirected" to a designated detonation area, simply by making it believe it is hitting the target.
Kjella