India Successfully Launches Region-Specific Navigation Satellite
vasanth writes India has successfully launched IRNSS-1C, the third satellite in the Indian Regional Navigation Satellite System (IRNSS), early on October 16. This is the 27th consecutively successful mission of the PSLV(Polar Satellite Launch Vehicle). The entire constellation of seven satellites is planned to be completed by 2015. The satellite is designed to provide accurate position information service to users in the country as well as in the region extending up to 1,500 km from its boundary, which is its primary service area. In the Kargil war in 1999, the Indian military sought GPS data for the region from the U.S. The space-based navigation system maintained by the U.S. government would have provided vital information, but the U.S. denied it to India. A need for an indigenous satellite navigation system was felt earlier, but the Kargil experience made India realise its inevitability in building its own navigation system. "Geopolitical needs teach you that some countries can deny you the service in times of conflict. It's also a way of arm twisting and a country should protect itself against that," said S Ramakrishnan, director of Vikram Sarabhai Space Centre, Thiruvananthapuram.
Great work, India! You've managed to catch up the 1950s-era Soviet Union and United States!
Otherwise, it would have never taken off.
I know of at least the following systems that exist or are being built: GPS (United States), GLONASS (Russia), Galileo (planned, European Union), Indian Regional Navigation Satellite System (India), and the Beidou Navigation Satellite System (China). GPS and GLONASS, in particular, have been around a long time.
- David A. Wheeler (see my Secure Programming HOWTO)
So this satellite only orbits above India?
That must be a tricky orbit.
You could have one sitting above Sri Lanka (well a little bit to the south) 25,000 miles up.
No, the question you should be asking is....
How many countries have their own in-house built GPS solutions POWERED BY CURRY??
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With the added benefit that saying "8.460N,76.963E" is much faster than pronouncing this city name!
Test The space-based navigation system maintained by the U.S. government would have provided vital information, but the U.
Quasi-zenith (Japan) is missing in your list.
Japan's sortof counts because their GPS system is actually an enhancement of the United States GPS system in that Quazizenith will be able to track down to centimeters. Hopefully something the US GPS will never do.
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Commercial and foreign access of GPS are intententionally. Military GPS aka Precise GPS is very, very accurate.
Chinas was stolen from usa so it doesnt countã
GPS (US GNSS) already "tracks" to the SUB centimeter level (carrier phase psuedo-range measurements) - used in tectonic analysis and general survey applications.
I don't see why the Indians can't use a smartphone, tablet, Garmin, Magellan, Tom-Tom for navigation? They all have GPS receivers. I must be missing something.
Therefore, from the in-house GPS perspective, india is in top 5 countries. I'd say that's quite an achievement.
...gis sdrawkcab (usually not responding to ACs; don't bother posting as AC)
India's people are quite impoverished and many of the home don't even have indoor plumbing. I don't understand a government that wants to go to the moon, mars, or have its own fancy satellite GPS system while it can 'barely' take care of its own people.
this probably ties in with the successful test of the Indian cruise missile, they would want their own navigation system for it...
http://news.xinhuanet.com/english/world/2014-10/17/c_133723891.htm
Why on earth would you consider more accurate GPS a bad thing? If it's "omg cell phones", they track you other ways (tower triangulation to ~10m) and you don't have to worry anyway, the class of oscillator it would take to track you at cm accuracy costs nearly as much as your entire phone (look em up, 'double oven crystal oscillator').
Also, military guys are given GPS receivers that have the code to remove the scrambling in GPS and can in fact track at ~10cm accuracy as opposed to ~meter accuracy at the present. Frankly, I can see no meaningful use for going from 100cm to 10cm unless you're a particularly paranoid surveyor, but...
I understand the US intends to remove that restriction as it doesn't exist in Gallileo and some modernisation to keep up with the accuracy of Gallileo. Glonass is more accurate in the far north (slightly less elsewhere).
Japan has been putting up satellites to enhance and eventually provide an alternative to GPS over its territory too.
Bottom line is, something that valuable to your military can't be shared with potentially hostile or uncooperative countries.
const int one = 65536; (Silvermoon, Texture.cs)
SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
If the Syrian regime wasn't a sponsor of terrorism against Israel via Hamas, Hizbullah and Islamic Jihad, I'd have nothing against them. As for how they treat their citizens, they persecute their Sunnis, but I don't hold that against them: they - the Alawites - would be persecuted if the shoe was on the other foot, which was clear when the Free Syrian Army (sic) overran cities like Aleppo and Homs and massacred/drove out Christians from those places. If this was a democratic uprising against the Assads, with due respect for religious pluralism, it would have been a lot easier to morally support the rebellion. In truth, the Free Syrian Army is not that much different from ISIS, and neither is Hamas, Hizbullah or Islamic Jihad
How do they stop the service at the borders? Do the sats turn around?
They are in polar orbits, so they cover the whole planet. How can that be considered regional?
Well, I might have a way, but it only works on a semi spherical planet in a vacuum.