February 7, 1994 |
Andrea Donnellan kneels on the barren crest of Oat Mountain and, with her Powerbook computer coupled to a tiny satellite receiver, pinpoints the shards of Southern California's broken landscape with an unsettling accuracy. It is as she suspected. The 3,477-foot-tall mountain, heaving upward since the moment of the 6.6 Northridge earthquake last month, has grown another inch since she last checked. "This is mountain-building in progress," she said.
December 22, 2003 |
A rocket lifted off early Sunday, carrying into orbit a satellite designed to increase the accuracy of Global Positioning System signals for military and civilian users. The satellite will replace an older model that is running low on power, according to Air Force Col. Allen Ballenger, system program director for the NAVSTAR GPS Joint Program Office. The $45-million satellite has a life expectancy of about 10 years and is expected to be operational in 25 days or less.
October 26, 2000
The Global Positioning System consists of 24 Earth-orbiting satellites, called Navstars, that allow anyone with a GPS receiver to determine his or her longitude and latitude accurate to within 50 feet. Since the U.S. made it available for public use in the 1980s, the system has been used for everything from tracking freight trucks to helping hikers stay on course.
March 25, 1996 |
Golf is a game of rituals, and few are more sacred or idiosyncratic than the methods players use to line up a shot. Some toss blades of grass into the air to check the wind. Others focus on a twig or a leaf in front of the ball to align themselves with the flag. Then there are those who consult the computer screen in their cart for coordinates calculated by triangulating signals from global positioning satellites floating 11,000 miles above the earth's surface.
October 22, 2006 |
I am one of many American males too proud and stubborn to ask for driving directions. But I was forced to put my ego aside when faced with the prospect of losing something more important than my pride: the ability to enjoy an auto tour of Europe without wasting time getting lost or being frustrated deciphering maps in languages I did not understand. The source of my salvation was a global positioning satellite, or GPS, device, which made it difficult, though not impossible, to get lost.
October 26, 2003 |
When not being used to measure yardage to the green or to track philandering partners, the consumer GPS (global positioning system) may get its heaviest workout as conduit for the Tech Age scavenger hunts known as geocaching. For stick-in-the-muds still mired in the dark ages of the 20th century, GPS gizmos use satellite signals to determine a user's precise whereabouts within a range of several feet.
August 6, 1999 |
Several federal agencies issued a warning Thursday to hikers, boaters, drivers and others who use the global positioning system to beware of the possibility that their devices may malfunction Aug. 21-22 because of an unusual phenomenon known as "End of Week Rollover." The rollover problem stems from the original design of the GPS, which calculates the date by counting the number of weeks from Jan. 6, 1980. After the 1,024th week--about 20 years--the system resets back to zero.
December 16, 2004 |
President Bush has ordered plans for temporarily disabling the U.S. network of global positioning satellites during a national crisis to prevent terrorists from using the navigational technology, the White House said Wednesday. Any shutdown of the network inside the United States would come under only the most remarkable circumstances, said a Bush administration official who spoke to a small group of reporters at the White House on condition of anonymity.
October 9, 2005 |
The TomTom Go 700 sounds like a dream gadget for Southern California drivers: a GPS navigation unit for the car that not only pinpoints exact position and maps out directions, but also provides real-time traffic information for the route. It can even, at the push of a touch screen, almost instantly remap a route to avoid traffic snarls. It's an undeniably innovative use of the satellite-based global positioning system in conjunction with traffic data from the Internet.