2020089
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2020089 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
Please disregard NANU 2020088 due to an error in the naming convention. Outage start and stop times remain accurate. The correct NANU will be labeled UNUSABLE.
*** GENERAL MESSAGE TO ALL GPS USERS ***
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 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |
2022002
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022002 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
On approximately 20 JAN 2022, SVN41 will resume transmitting L-band utilizing PRN22.
On 20 JAN 2022, after 2200Z, GPS will transition SVN41 (PRN22) into the broadcast almanac for all satellites:
- The almanac transition, accomplished one satellite at a time, will require approximately 24 hours to complete
- Before, during, and after transition SVN41 (PRN22) will remain unusable until further notice
- Future NANUs will notify users of any changes to the above stated status
*** GENERAL MESSAGE TO ALL GPS USERS ***
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 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |
2022016
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022016 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
PLEASE DISREGARD NANU 2022015 DUE TO AN ERROR IN THE NAMING CONVENTION. OUTAGE START AND STOP TIMES REMAIN ACCURATE. THE CORRECT NANU WILL BE LABELED UNUSABLE.
*** GENERAL MESSAGE TO ALL GPS USERS ***
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 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |
2022042
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022042 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
NANU 2022040 Labelled Incorrectly. NANU 2022041 Reflects Correct Label.
*** GENERAL MESSAGE TO ALL GPS USERS ***
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 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |
2022054
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022054 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
NANU 2022053 Outage Stop Time Incorrect, Outage Ongoing. UNUSABLE to Follow. NANU 2022053 is to be Disregarded.
*** GENERAL MESSAGE TO ALL GPS USERS ***
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 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |
2022086
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022086 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
On approximately 27 OCT 2022, SVN49 will resume transmitting L-band utilizing PRN28; at L-band activation, SVN49/PRN28 will be unusable until further notice (additionally, no broadcast almanacs will include SVN49/PRN28 until further notice).
*** GENERAL MESSAGE TO ALL GPS USERS ***
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 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |
2022104
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022104 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
Please disregard NANU 2022101. Please reference NANU 2022103 instead.
*** GENERAL MESSAGE TO ALL GPS USERS ***
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 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |
2023042
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2023042 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
On approximately 14 AUG 2023, SVN44 will resume transmitting L-band utilizing PRN22.
On 10 AUG 2023, GPS will transition SVN44 (PRN22) into the broadcast almanac for all satellites. The almanac transition, accomplished one satellite at a time, will require approximately 24 hours to complete. Before, during, and after transition SVN44 (PRN22) will remain unusable until further notice. Future NANUs will notify users of any changes to the above stated status.
*** GENERAL MESSAGE TO ALL GPS USERS ***
POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS WARFIGHTER COLLABORATION CELL 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 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |
2024014
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2024014 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
The Space Force?s 2d Space Operations Squadron (2 SOPS) and the National Geospatial Intelligence Agency?s Global Navigation Satellite System Division (SFNG) worked collaboratively to deliver an updated WGS 84 reference frame to worldwide users of GPS.
NGA is responsible for maintaining the World Geodetic System 1984 (WGS 84) Terrestrial Reference frame which is used by the U.S. Department of Defense for its geolocation needs. In order to ensure adherence to international standards, facilitate interoperability with other GNSS, and satisfy US agreements and public commitments, NGA aligns the WGS 84 Terrestrial Reference Frame (TRF) to the International Terrestrial Reference Frame (ITRF) as closely as possible. In this case, alignment involves updating both the positions of the GPS monitor stations which define the WGS 84 TRF as well as the Antenna Phase Center Offsets of the GPS satellites as contained in the IGS20 ANTEX file.
On 07 January 2024, 2 SOPS and NGA adopted the new IGS20 ANTEX values at virtually the same time, ensuring that NGA?s orbit products and the operational GPS constellation remain consistent. As of 04 March 2024, both 2 SOPS and NGA have adopted the newly updated GPS monitor station locations completing the implementation of the new WGS 84 realization. This new WGS 84 realization, WGS 84 (G2296) is aligned to both the ITRF2020, the most recent ITRF realization, and the IGS20, the frame used by the International GNSS Service.
These updates represent an improvement in positioning for high accuracy users and ensures that the United States maintains its public commitment that WGS 84, the implicit reference frame for all users of GPS, remains consistent with international standards.
For more information on this update to WGS 84, see the document at the following link: https://earth-info.nga.mil/php/download.php?file=WGS%2084(G2296).pdf
POCs: geomatics@nga.mil, GPSOperationsCenter@us.af.mil
*** GENERAL MESSAGE TO ALL GPS USERS ***
POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS WARFIGHTER COLLABORATION CELL at HTTPS://GWCC-WS.CCE.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GWCC-WS.CCE.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |
2024020
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NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2024020 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
On approximately 22 APR 2024, SVN49 will resume transmitting L-band utilizing PRN01; at L-band activation, SVN49/PRN01 will be unusable until further notice (additionally, no broadcast almanacs will include SVN49/PRN01 until further notice).
*** GENERAL MESSAGE TO ALL GPS USERS ***
POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS WARFIGHTER COLLABORATION CELL at HTTPS://GWCC-WS.CCE.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GWCC-WS.CCE.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL |