Showing 36 posts tagged gps
China has opened up its domestic sat-nav network to commercial use across the Asia-Pacific region.
Beidou - named after the Chinese word for the Big Dipper constellation - offers an alternative to the US’s global positioning system (GPS).
It had previously been restricted to the Chinese military and government.
A spokesman said that Beidou is targeting a 70-80% share of the Chinese market in related location services by 2020.
The China Satellite Navigation Office added that by that time it also intended the service to be available across the globe.
» via BBC
The Obama administration told a federal court Tuesday that the public has no “reasonable expectation of privacy” in cellphone location data, and hence the authorities may obtain documents detailing a person’s movements from wireless carriers without a probable-cause warrant.
The administration, citing a 1976 Supreme Court precedent, said such data, like banking records, are “third-party records,” meaning customers have no right to keep it private. The government made the argument as it prepares for a re-trial of a previously convicted drug dealer whose conviction was reversed in January by the Supreme Court, which found that the government’s use of a GPS tracker on his vehicle was an illegal search.
» via Wired
Without GPS, drones can’t fly, communications networks can’t function, and you don’t have a chance of figuring out how to get to your Aunt Sadie’s place in New Jersey. And right now, GPS is highly vulnerable because its weak signals are coming from an aging constellation of satellites.
Lockheed Martin, the nation’s biggest military contractor, thinks the next generation of GPS satellites might be able to fix all that. GPS III, as it’s known, is designed to improve the accuracy of the GPS signal and have better resistance to jamming. Also, it is meant to be compatible with its international alternatives like the European Galileo system or the Russian GLONASS system. Potentially, it will improve GPS’ accuracy and resistance to jamming — the deliberate or accidental transmission of radio signals that interfere with regular communications.
» via Wired
A new positioning system has been developed to complement or even replace current technologies such as GPS.
Made by UK defence firm BAE Systems, it relies on the same signals used by mobile phones, TVs, radios and wi-fi rather than navigation satellites.
The firm says Navsop could help find victims inside buildings during a fire and locate stolen vehicles hidden in underground car parks.
It could also be used in a war if the sat-nav system was turned off.
» via BBC
Over the past two weeks, North Korea has used jamming equipment to interfere with global positioning system (GPS) signals near South Korea’s two largest airports outside its capital city Seoul and across the center of the Korean peninsula. The jamming caused no accidents or loss of life, but it demonstrates that North Korea is getting more and more brazen in its efforts to mess with South Korea’s high-tech infrastructure
» via ars technica
Capt. Mike Adams demonstrated what the future will look like at the nation’s airports as he pulled back on the throttles of his Boeing 737 flight simulator, setting the engines on idle to glide smoothly from his cruising altitude all the way down to the runway.
Starting in June, that’s exactly what actual Alaska Airlines flights will be doing when the airline begins testing the use of satellite technology to land at Seattle-Tacoma International Airport — all in the hope of saving fuel and reducing delays.
Alaska Airlines, one of the nation’s smallest airlines, has taken some of the biggest steps in adopting a technology that allows its planes to navigate Alaska’s hazardous terrain, weaving through narrow valleys and mountain peaks, and land at remote airports in some of the worst imaginable weather. It now wants to demonstrate that the same technology can also work at big, busy airports, said Captain Adams, the airline’s chief technical pilot.
» via The New York Times (Subscription may be required for some content)
Prosectors are shifting their focus to warrantless cell-tower locational tracking of suspects in the wake of a Supreme Court ruling that law enforcement should acquire probable-cause warrants from judges to affix GPS devices to vehicles and monitor their every move, according to court records.
The change of strategy comes in the case the justices decided in January, when it reversed the life sentence of a District of Columbia area drug dealer, Antoine Jones, who was the subject of 28 days of warrantless GPS surveillance via a device the FBI secretly attached to his vehicle without a warrant. In the wake of Jones’ decision, the FBI has pulled the plug on 3,000 GPS tracking devices.
» via Wired
LightSquared suffered a possibly fatal blow today when the FCC said it would indefinitely suspend the company’s effort to build a national wireless broadband network using satellite spectrum.
The National Telecommunications and Information Administration, a Department of Commerce agency tasked with overseeing military and government spectrum use, determined that LightSquared’s interference with other devices, including GPS devices, was unavoidable.
“Based on NTIA’s independent evaluation of the testing and analysis performed over the last several months, we conclude that LightSquared’s proposed mobile broadband network will impact GPS services and that there is no practical way to mitigate the potential interference at this time,” the NTIA said in a letter (PDF) to the Federal Communications Commission.
» via CNET