GPS World, September 2018
WATCH UAV 2 MARKETWATCH MARKET 2 TRANSPORTATION U S Department of Defense More Outreach Needed Before Interference Events FAA Told interference events designed for training in GPS denied environments also can affect civilian aircraft In April 2016 a business jet lost all GPS signals because of an interference event and was forced to enter a Dutch Roll resulting in an emergency descent Pilots and air traffic controllers in the National Airspace System want to better understand the operational impacts of the intentional interference events which have increased in frequency from 43 in 2012 to 127 in 2017 An RTCA Tactical Operations Committee composed of Federal Aviation Administration FAA and industry experts in March issued a report with recommendations to change the current Notices to Airmen NOTAMs Along with a description of the event NOTAMs show contours that represent an area outside of which operators should expect no interference impact Operators recommend that the FAA provide pilots and controllers improved understanding of where to expect interference impacts based on different equipment capabilities so that operators can integrate the information into their flight planning processes Impact varies widely depending on aircraft avionics position time location and terrain Effects could include complete loss of GPS navigation position errors loss of ADS B or impact to GPS dependent systems Operators are encouraging the FAA to conduct outreach with civil aviation stakeholders around significant interference events so they better understand the impact The FAA says it is studying the recommendations Interference contours from the YPG 17 02 GPS interference event in January 2017 Source FAA SEPTEMBER 2018 WWW GPSWORLD COM GPS WORLD 45
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