CGSIC Bulletin: High Horizontal Dilution of Precision (HDOP) Advisory for 24 – 25 January 2019

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High Horizontal Dilution of Precision (HDOP) Advisory for 24 – 25 January 2019

Users of the Global Positioning System (GPS) near may experience short periods of high HDOP/PDOP (HDOP greater than 6) between 241445Z and 250245Z January 2019 due to satellite maintenance (see NANU 2019010 below).

View the analysis provided by the GPS Operations Center on NAVCEN's web page. 


NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2019010
SUBJ: SVN34 (PRN18) FORECAST OUTAGE JDAY 024/1445 - JDAY 025/0245
1.  NANU TYPE: FCSTDV
     NANU NUMBER: 2019010
     NANU DTG: 172149Z JAN 2019
     REFERENCE NANU: N/A
     REF NANU DTG: N/A
     SVN: 34
     PRN: 18
     START JDAY: 024
     START TIME ZULU: 1445
     START CALENDAR DATE: 24 JAN 2019
     STOP JDAY: 025
     STOP TIME ZULU: 0245
     STOP CALENDAR DATE: 25 JAN 2019

2. CONDITION: GPS SATELLITE SVN34 (PRN18) WILL BE UNUSABLE ON JDAY 024 (24 JAN 2019) BEGINNING 1445 ZULU UNTIL JDAY 025 (25 JAN 2019) ENDING 0245 ZULU.

3.  POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV 
MILITARY - GPS OPERATIONS CENTER AT HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, GPSOPERATIONSCENTER@US.AF.MIL, HTTPS://GPS.AFSPC.AF.MIL 
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3514,
COMM 805-606-3514, JSPOCCOMBATOPS@VANDENBERG.AF.MIL


Please report GPS problems to NAVCEN through the Report a GPS Problem page.

Rick Hamilton
CGSIC Executive Secretariat
GPS Information Analysis Team Lead
U.S. Coast Guard Navigation Center
703-313-5930