FAA Warns of GPS Interference During LightSquared Cellular Tests
May 19, 2011 — The FAA has issued a NOTAM regarding testing of the effects of LightSquared’s proposed 4G cellular network on GPS signals. Overnight tests began May 16 in six-hour blocks and will continue until May 27. The circular test area is centered over the Boulder City, Nevada, VOR (BLD), has a 115-nautical-mile radius, and extends from the surface to Flight Level 300. The FAA is asking pilots who navigate through this area to report any anomalies with their GPS systems.
AvWeb reported that testing of the effect of LightSquared 4G network cellular systems on GPS systems used by first responders was conducted recently at Holloman Air Force Base in New Mexico. The participants (both police and EMS) reported interference with their GPS systems even after LightSquared’s transmitter was turned off. GPSWorld is hosting a webinar where the FCC Technical Working Group formed to address the LightSquared interference issue will provide an update on the progress of the testing.