FEDERAL AVIATION ADMINISTRATION FLIGHT ADVISORY GPS INTERFERENCE TESTING YUMA PROVING GROUND (YPG) 17-10 25-26 October, 2017 Yuma, AZ GPS testing is scheduled as follows and may result in unreliable or unavailable GPS signal. A. Location: Centered at 332511N1142008W or the BLH VOR 105 degree radial at 24NM. B. Dates and times: 25 - 26 Oct 17 2030Z – 2230Z C. Duration: Each event may last the entire requested period. D. NOTAM INFO: NAV GPS (YPG GPS 17-10) (INCLUDING WAAS, GBAS, AND ADSB) MAY NOT BE AVBL WI A 268NM RADIUS CENTERED AT 332511N1142008W (BLH 105024) FL400-UNL, 223NM RADIUS AT FL250 161NM RADIUS AT 10000FT 161NM RADIUS AT 4000FT AGL 117NM RADIUS AT 50FT AGL E. Pilots are encouraged to report anomalies only when ATC assistance is required. The NOTAMs discussed in this advisory may change with little or no notice. Pilots are advised to check NOTAMs frequently for possible changes prior to operations in the area. NOTAMs will be published at least 24 hours in advance of any GPS tests.