Released 18 September 2018

FEDERAL AVIATION ADMINISTRATION FLIGHT ADVISORY GPS INTERFERENCE TESTING

YUMA PROVING GROUND (YPG) 18-25 (Revision 1)

21– 29 September 2018

Yuma, AZ

GPS testing is scheduled as follows and may result in unreliable or unavailable GPS signal.

A.

Location: Centered at 325526N1135330W or the B ZA V ORTAC 064-degree radial at 37NM.

B.

Dates and times:

21 SEP 18 0700Z – 1200Z

23 – 24 SEP 18 0700Z – 1200Z

26 SEP 18 0700Z – 1200Z

28 – 29 SEP 18 1000Z – 1300Z

C.

Duration: Each event may last the entire requested period

.

D.

NOTAM INFO: NAV GPS (YPG GPS 18-25) (INCLUDING WAAS, GBAS, AND ADS-B) MAY NOT BE AVBL WI A 337NM RADIUS CENTERED AT 325526N1135330W (BZA064037) FL400-UNL, 329NM RADIUS AT FL250, 224NM RADIUS AT 10000FT, 211NM RADIUS AT 4000FT AGL, 142NM RADIUS AT 50FT AGL.

E.

Pilots are encouraged to report anomalies in accordance with the Aeronautical Information Manual (AIM) paragraphs 1-1-13 and 5-3- 3.

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.