One of the primary purposes of the study was to assess the risk to the augmented GPS signal from intentional interference, or jamming, and unintentional interference, such as heightened solar activity and interference from certain commercial TV and VHF broadcast signals. Essentially, the study found that a combination of procedural and technical measures to mitigate the effects of both types of interference are achievable and must be implemented as part of the future augmented GPS system to ensure acceptable performance. The report also identifies the need for closer cooperation with the DOD in investigating more efficient combinations of DOD and the Department of Transportation systems, including the possibility of additional GPS satellites.
Johns Hopkins will publish study results at: www.jhuapl.edu/transportation/aviation/gps/
An electronic version of this news release is available via the World Wide Web at：www.faa.gov
