LightSquared documents submitted to the FCC last week reveal that its transmitters were transmitting at only half power during the tests recently conducted in the Las Vegas area to check for interference with GPS receivers. This means that any interference detected by the GPS units could be as much as half that expected when the LightSquared transmitters operate at their eventual planned power levels.
The confrontation between LightSquared and the U.S. government and industry GPS interests is heating up. LightSquared was able to obtain an FCC waiver of its satellite broadcast license to build a supplemental terrestrial transmitter network for broadband wireless. The GPS community claims that LightSquared’s plan, using a radio frequency close to that of GPS, will create interference. On Friday, Rep.
While the LightSquared broadband wireless network’s potential to disrupt GPS signals has been widely publicized, a lesser known problem is the possibility of the system’s high-power transmitters interfering with satcom.
Toronto-based Star Navigation Systems offers business jets something better than the airline black box: the Star In-flight Safety Monitoring System (Star-ism). “Our original system, introduced in 2005, provided current information to pilots and ground controllers, giving them the ability to note anomalies and nip problems in the bud,” said Viraf Kapadia, CEO of Star Navigation Systems Group.
A last-minute change in U.S. loran policy has raised serious concerns among international navigation and security organizations. In late February, the Office of Management and Budget (OMB) removed loran-C funding from the President’s budget, provoking an immediate response from the UK.
At recent public hearings in Washington, D.C., and Albuquerque, N.M., DOD and DOT representatives reviewed the departments’ policies toward the provision of radionavigation services to the U.S. civil user community between now and 2020. The hearings were held to solicit user comments on those policies before publication of this year’s federal radionavigation plan (FRP), which will be available by year-end.
Other than the occasional contradiction, the recently released federal radionavigation plan (FRP) reveals few surprises. The FRP does, however, include a revised schedule
for the gradual phaseout of certain VOR, VOR/DME and ILS installations across the continental U.S., primarily following nationwide certification of WAAS. Originally planned to commence in 2008, the phaseout has now slipped to 2011.
DOT Secretary Norman Mineta announced last month an action plan aimed at mitigating the vulnerability of GPS to inadvertent interference and deliberate jamming, both of which were disclosed in a September 10 report by the DOT’s Volpe National Transportation Systems Center in Cambridge, Mass.
Every spring the federal government departments must submit to Congress their proposed spending estimates for inclusion in the President’s budget for the next fiscal year. The estimates go first to separate appropriations committees in the House and Senate for review and the inclusion of any changes the legislators believe are necessary before being combined into the final budget.