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NANU Types and Templates/Examples Forecast Outages • FCSTDV, or Forecast Delta-V - gives scheduled outage times for Delta-V maneuvers. The satellite is moved during this maintenance and the user may be required to download a new almanac. • FCSTMX, or Forecast Maintenance - gives scheduled outage times for Ion Pump Operations or software tests. • FCSTEXTD, or Forecast Extension – extends the scheduled outage time “Until Further Notice”; references the original NANU. • FCSTSUMM, or Forecast Summary - gives the exact outage times for the scheduled outage, including the FCSTEXTD; sent after the maintenance is complete and the satellite is set healthy to users; references the original NANU. • FCSTCANC, or Forecast Cancellation – cancels a scheduled outage; new maintenance time not yet determined; references the original NANU. • FCSTRESCD, or Forecast Rescheduled – reschedules a scheduled outage; references the original NANU. Unscheduled Outages • UNUSUFN, or Unusable Until Further Notice – notifies users that a satellite will be Unusable to all users until further notice. • UNUSABLE, or UNUSABLE with a reference NANU - closes out an UNUSUFN NANU and gives the exact outage times for the outage; references the UNUSUFN NANU. • UNUNOREF, or UNUSABLE with no reference NANU – gives times for outages that were resolved before a UNUSUFN NANU could be sent. Other • USABINIT, or Initially Usable, notifies users that a satellite is set healthy for the first time. • LEAPSEC, or Leap Second, is used to notify users of an impending leap second and all data after the subject line is free flowing text. • GENERAL, informs the user of general GPS information and is written using free flowing text. • LAUNCH, is used to notify users of an impending GPS launch using a format similar to the GENERAL NANU format. FCSTDV TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVNXX (PRNXX) FORECAST OUTAGE JDAY JJJ/HHMM - JDAY JJJ/HHMM 1. NANU TYPE: FCSTDV NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY 2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WILL BE UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL FCSTMX TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVNXX (PRNXX) FORECAST OUTAGE JDAY JJJ/HHMM - JDAY JJJ/HHMM 1. NANU TYPE: FCSTMX NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY 2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WILL BE UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL FCSTEXTD TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVNXX (PRNXX) FORECAST OUTAGE EXTENDED UNTIL FURTHER NOTICE 1. NANU TYPE: FCSTEXTD NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: YYYYNNN REF NANU DTG: DDHHMMZ MMM YYYY SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: UFN STOP TIME ZULU: N/A STOP CALENDAR DATE: N/A 2. CONDITION: THE FORECAST OUTAGE FOR GPS SATELLITE SVNXX (PRNXX) IS EXTENDED UNTIL FURTHER NOTICE. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL FCSTSUMM TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVNXX (PRNXX) FORECAST OUTAGE SUMMARY JDAY JJJ/HHMM - JDAY JJJ/HHMM 1. NANU TYPE: FCSTSUMM NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: YYYYNNN REF NANU DTG: DDHHMMZ MMM YYYY SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY 2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WAS UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL FCSTCANC TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVN13 (PRN02) FORECAST OUTAGE CANCELLED 1. NANU TYPE: FCSTCANC NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: YYYYNNN REF NANU DTG: DDHHMMZ MMM YYYY SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: CANCELLED STOP TIME ZULU: N/A STOP CALENDAR DATE: N/A 2. CONDITION: THE FORECAST OUTAGE FOR GPS SATELLITE SVNXX (PRNXX) SCHEDULED FOR JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU HAS BEEN CANCELLED. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL FCSTRESCD TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVNXX (PRNXX) FORECAST OUTAGE RESCHEDULED 1. NANU TYPE: FCSTRESCD NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: YYYYNNN REF NANU DTG: DDHHMMZ MMM YYYY SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY 2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WILL BE UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU. PLEASE REFERENCE NANU NUMBER YYYYNNN DTG DDHHMMZ MMM YYYY FOR THE ORIGINAL OUTAGE TIME. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL UNUSUFN TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVNXX (PRNXX) UNUSABLE JDAY JJJ/HHMM - UNTIL FURTHER NOTICE 1. NANU TYPE: UNUSUFN NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: UFN STOP TIME ZULU: N/A STOP CALENDAR DATE: N/A 2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WILL BE UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL FURTHER NOTICE. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL UNUSABLE TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVNXX (PRNXX) UNUSABLE JDAY JJJ/HHMM - JDAY JJJ/HHMM 1. NANU TYPE: UNUSABLE NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: YYYYNNN REF NANU DTG: DDHHMMZ MMM YYYY SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY 2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WAS UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL UNUNOREF TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVNXX (PRNXX) UNUSABLE JDAY JJJ/HHMM - JDAY JJJ/HHMM 1. NANU TYPE: UNUNOREF NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: JJJ STOP TIME ZULU: HHMM STOP CALENDAR DATE: DD MMM YYYY 2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WAS UNUSABLE ON JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU UNTIL JDAY JJJ (DD MMM YYYY) ENDING HHMM ZULU. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL USABINIT TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: SVNXX (PRNXX) USABLE JDAY JJJ/HHMM 1. NANU TYPE: USABINIT NANU NUMBER: YYYYSSS NANU DTG: DDHHMMZ MMM YYYY REFERENCE NANU: N/A REF NANU DTG: N/A SVN: XX PRN: XX START JDAY: JJJ START TIME ZULU: HHMM START CALENDAR DATE: DD MMM YYYY STOP JDAY: N/A STOP TIME ZULU: N/A STOP CALENDAR DATE: N/A 2. CONDITION: GPS SATELLITE SVNXX (PRNXX) WAS USABLE AS OF JDAY JJJ (DD MMM YYYY) BEGINNING HHMM ZULU. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL LEAPSEC TEMPLATE NOTICE ADVISORY TO NAVSTAR USERS (NANU) YYYYSSS SUBJ: LEAP SECOND 1. CONDITION: THE INTERNATIONAL EARTH ROTATION SERVICE (IERS) HAS ANNOUNCED THE INTRODUCTION OF A LEAP SECOND TO OCCUR AT THE END OF MMM YYYY 2. COORDINATED UNIVERSAL TIME (UTC) WILL SEQUENCE AS FOLLOWS: DD MMM YYYY HH HOURS MM MINUTES SS SECONDS DD MMM YYYY HH HOURS MM MINUTES SS SECONDS DD MMM YYYY HH HOURS MM MINUTES SS SECONDS 3. FOR GPS, AS WITH PREVIOUS LEAP SECOND UPDATES, THE UTC DATA IN SUBFRAME 4,PAGE 18 OF THE NAVIGATION MESSAGE WILL CHANGE IN ACCORDANCE WITH ICD-GPS-200. BEFORE THE LEAP SECOND GPS-UTC IS XX (GPS IS AHEAD OF UTC BY XX SECONDS) AFTER THE LEAP SECOND GPS-UTC WILL BE XX (GPS WILL BE AHEAD OF UTC BY XX SECONDS) 4. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL GENERAL TEMPLATE 1. NANU TYPE: GENERAL *** GENERAL MESSAGE TO ALL GPS USERS *** *** GENERAL MESSAGE TO ALL GPS USERS *** LAUNCH TEMPLATE 1. NANU TYPE: LAUNCH *** GENERAL MESSAGE TO ALL GPS USERS *** 2. GPS SATELLITE SVNXX (PRNXX) WAS LAUNCHED ON JDAY JJJ (DD MMM YYYY). A USABINIT NANU WILL BE SENT WHEN THE SATELLITE IS SET ACTIVE TO SERVICE. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW.NAVCEN.USCG.GOV MILITARY - GPS Support Center at HTTP://WWW.SCHRIEVER.AF.MIL/GPSSUPPORTCENTER, DSN 560-2541, COMM 719-567-2493, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS MILITARY ALTERNATE - 14 AF AIR & SPACE OPERATIONS CENTER, DSN 276- 9994.COMM 805-606-9994. V3SPACEAF.AOC@VANDENBERG.AF.MIL *** GENERAL MESSAGE TO ALL GPS USERS ***
