Geodesy

March 8, 2011 - 7:14am

Following a certification and verification process, the European Commission approved the European Geostationary Navigation Overlay Service (Egnos) “safety-of-life” service for aviation last Wednesday. Egnos is closely similar to, and compatible with, the U.S. Waas satellite-based augmentation system that corrects timing errors in GPS signals, making it more accurate.

March 3, 2011 - 9:46am

Over the next three months, a panel of 14 experts will test and analyze whether LightSquared's proposal to transmit Internet data from a nationwide network of 40,000 high-powered ground stations will jam very low powered GPS signals operating in the immediately adjacent GPS frequency band.

February 28, 2011 - 5:05am

Small, inexpensive GPS jammers carried by truckers have caused the occasional shutdown of the Laas test installation at Newark Airport. The devices, powered by simply plugging into the cigarette lighter, are intended to foil interrogations of the truck's remotely installed GPS and its coupled cellphone by the trucking company's dispatcher to check on the vehicleπs location and progress.

May 3, 2010 - 6:40am

Eurocopter recently announced the success of the flights it conducted in November with an EC145 light twin to test Galileo satellite navigation. Galileo, Europe’s GPS counterpart, is expected to offer higher reliability than current augmented GPS. But
the helicopter manufacturer does not expect the tested applications to be operational until 2015.

April 30, 2010 - 4:54am

The first geostationary satellite for India’s Gagan GPS space-based augmentation system (SBAS)–essentially similar to Waas–was lost on April 15 when its launch rocket’s second-stage cryogenic engine failed to ignite. That followed the early-April loss of Intelsat’s Galaxy 15 geosat, which was carrying the FAA’s Pacific Waas transponder.

April 22, 2010 - 12:04pm

The first geostationary satellite for India’s Gagan GPS space-based augmentation system (SBAS)–essentially similar to Waas–was lost on April 15 when its launch rocket’s second-stage cryogenic engine failed to ignite. That followed the early-April loss of Intelsat’s Galaxy 15 geosat, which was carrying the FAA’s Pacific Waas transponder. The satellite was slowly drifting out of orbit and could no longer provide usable GPS accuracy corrections.

January 27, 2010 - 11:36am

The U.S. Coast Guard and its parent, the Department of Homeland Security, on January 7 announced that U.S. loran-C stations will be progressively shut down between February and October, since everyone now uses GPS for navigation. The banks and the communications industry also moved from loran to the slightly more accurate GPS for split-second transaction timing for our ATMs and our cellphones.

January 19, 2010 - 11:41am

The U.S. Coast Guard and its parent agency, the Department of Homeland Security, announced earlier this month that loran-C stations in the U.S. will be progressively shut down between next month and October. The U.S. considers maintaining its loran station network, costing $36 million per year, unaffordable.

June 30, 2009 - 11:43am

Testifying before Congress in May, Stanford University professor Brad Parkinson–the chief architect of GPS and the original GPS program manager before his retirement from the USAF–echoed the concern of the Government Accountability Office (GAO) that there will be insufficient backup satellites to fill gaps in the constellation before the DOD’s forecast 2014 launches of its next-generation GPS III units. (see AIN, June, page one.)

May 26, 2009 - 8:08am

GPS service is in danger of severe erosion, according to a report from the Government Accountability Office (GAO). A Congressional “watchdog” of programs and spending of government departments, the GAO warns that the satellite navigation service could slowly worsen after 2010, and not recover to acceptable aviation levels before 2022.

 
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