(Phys.org)—A new positioning system can take on where GPS leaves off. An Australia-based company, Locata, is featuring a ground-based system using stronger signals than GPS for pinpointing a person's location indoors or ...
A problem that rendered as many as 10,000 U.S. military GPS receivers useless for days is a warning to safeguard a system that enemies would love to disrupt, a defense expert says.
Telecom
Jun 1, 2010
7
0
(PhysOrg.com) -- GPS is getting an upgrade costing $8 billion (US), which aims to increase the system's accuracy, improve its reliability, and make the technology even more widespread.
(PhysOrg.com) -- The US military is studying the feasibility of a system that could allow them to accurately navigate in enemy underground tunnels, an environment in which GPS does not work.
The massive magnitude 8.8 earthquake that struck the west coast of Chile last month moved the entire city of Concepcion at least 10 feet to the west, and shifted other parts of South America as far apart as the Falkland Islands ...
Earth Sciences
Mar 8, 2010
3
0
You can put those maps away. The US Air Force has shot down fears that the space-based Global Positioning System (GPS) is going to crash.
Telecom
May 21, 2009
3
0
(PhysOrg.com) -- A federal watchdog agency has warned the U.S. Congress that the GPS system could start failing in 2010 and beyond. Due to delays in launching replacement satellites and other circumstances, the GPS systems ...
Two weeks after the rains begin, an elephant family named "the Royals" usually switches to a grass diet to bulk up for pregnancy and birth. But when they wandered off their African reserve one rainy season, cattle grazed ...
Plants & Animals
Apr 13, 2009
0
0
China launched two new satellites into space Saturday, state media reported, as it builds a homegrown satellite navigation system to rival the US's Global Positioning System.
Space Exploration
Jul 26, 2015
1
1645
A "twisted rope" of magnetically-charged energy precedes solar storms that have the potential to damage satellites and electricity grids, French scientists said on Wednesday.
Space Exploration
Oct 22, 2014
5
0
The Global Positioning System (GPS) is a global navigation satellite system (GNSS) developed by the United States Department of Defense and managed by the United States Air Force 50th Space Wing. It is the only fully functional GNSS in the world, can be used freely by anyone, anywhere, and is often used by civilians for navigation purposes. It uses a constellation of between 24 and 32 medium Earth orbit satellites that transmit precise radiowave signals, which allow GPS receivers to determine their current location, the time, and their velocity. Its official name is NAVSTAR GPS. Although NAVSTAR is not an acronym, a few backronyms have been created for it.
Since it became fully operational on April 27, 1995, GPS has become a widely used aid to navigation worldwide, and a useful tool for map-making, land surveying, commerce, scientific uses, tracking and surveillance, and hobbies such as geocaching. Also, the precise time reference is used in many applications including the scientific study of earthquakes and as a required time synchronization method for cellular network protocols such as the IS-95 standard for CDMA.
This text uses material from Wikipedia, licensed under CC BY-SA
