Your GPS may not work at all this weekend, at least correctly in all cases.
Testing will be conducted at any of these facilities:
https://www.navcen.uscg.gov/pdf/gps/gpsnotices/GPS_Interference.pdf
https://www.google.com/maps/place/32%C2%B000%2700.0%22N+118%C2%B027%2700.0%22W/@32.1768507,-118.7741019,8z/data=!4m5!3m4!1s0x0:0x0!8m2!3d32!4d-118.45
It will start on Saturday 04/15 all day and may effect most of California.
GPS 04/049 ZOA NAV (FACSFACSD GPS 17-01) GPS (INCLUDING WAAS, GBAS, AND
ADS-B)
MAY NOT BE AVBL WI A 464NM RADIUS CENTERED AT 320000N1184500W (MZB 227090)
FL400-UNL
409NM RADIUS AT FL250
340NM RADIUS AT 10000FT
317NM RADIUS AT 4000FT AGL
249NM RADIUS AT 50FT AGL.
17/04/15 1630-17/04/15 - 1829
Current constellation status:
https://www.navcen.uscg.gov/?Do=constellationstatus
More on GPS:
http://www.gps.gov/systems/gps/space/
