Users of the Global Positioning System (GPS) in Spain and in part of the Southern Indian Ocean may experience short periods of high HDOP/PDOP (HDOP >6) at various times between 151530Z – 160330Z APR 2015 due to satellite maintenance (NANU 2015-024). Predictions are based on a "Best Four" analysis to illustrate the worst case scenario and are provided for situational awareness only. You may view illustrations of the events at the following NAVCEN page: http://www.navcen.uscg.gov/?pageName=HDOP_Event_04152015
Please report any outages through the NAVCEN "Report a GPS Problem" page: http://www.navcen.uscg.gov/?pageName=gpsUserInput