GPS signal may be wonky in southern California on June 7, 9, 21,. 23, 28, 30th 2016

 

If you are planning on using a GPS in California in this area on June 7, 9, 21,. 23, 28, 30th be advised that there will be a "GPS Disturbance Test" that on these days that could mess up your accuracy. The FAA Notice to Airmen is below.
 
FAA GPS signal scramble area in California June 2016

FEDERAL AVIATION ADMINISTRATION

FLIGHT ADVISORY GPS Interference Testing CHLK GPS 16-08 07-30 June, 2016 China Lake, California

GPS testing is scheduled as follows and may result in unreliable or unavailable GPS signal. A. Location: Centered at 360822N1173846W or the BTY VOR 214 degree radial at 059 NM. B. Dates and times:

7 JUN 16 1630Z – 2230Z

9 JUN 16 1630Z – 2230Z

21 JUN 16 1630Z – 2230Z

23 JUN 16 1630Z – 2230Z

28 JUN 16 1630Z – 2230Z

30 JUN 16 1630Z – 2230Z

C. Duration: Each event may last the entire requested period.

D. NOTAM INFO: NAV (CHLK GPS 16-08) GPS (INCLUDING WAAS, GBAS, AND ADS- B) MAY NOT BE AVBL WI A 476NM RADIUS CENTERED AT 360822N1173846W (BTY 214059) FL400-UNL DECREASING IN AREA WITH A DECREASE IN ALT DEFINED AS: 432NM RADIUS AT FL250

375NM RADIUS AT 10000FT 340NM RADIUS AT 4000FT AGL 253NM RADIUS AT 50FT AGL

THIS NOTAM APPLIES TO ALL AIRCRAFT RELYING ON GPS. ADDITIONALLY, DUE TO GPS INTERFERENCE IMPACTS POTENTIALLY AFFECTING EMBRAER PHENOM 300 AIRCRAFT FLIGHT STABILITY CONTROLS, FAA RECOMMENDS EMB PHENOM PILOTS AVOID THE ABOVE TESTING AREA AND CLOSELY MONITOR FLIGHT CONTROL SYSTEMS DUE TO POTENTIAL LOSS OF GPS SIGNAL.

Affected Centers:
E. Pilots are encouraged to report anomalies only when ATC assistance is required. 

 

Full Advisory can be read here 

https://www.faasafety.gov/files/notices/2016/Jun/CHLK_16-08_GPS_Flight_Advisory.pdf

 

Read More:

http://www.iflscience.com/technology/mysterious-tests-will-scramble-gps-signals-on-americas-west-coast-this-month/

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