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Constellation Information

Update： 2025/12/16

Message

　
  •  :In Operation
  •  :Retired
  •  :Outage
  •  :In commissioning
  •  :Maintenance
  •  :In testing
  •  :Time problem

QZS

Services Positioning Signals PRN Operation NAQU Number
QZS02 (SVN=002, Block type=Ⅱ-Q)
PNT L1C/A, L1C, L2C, L5 194 O
SLAS L1S 184 O
PTV L5S 184 O
CLAS L6D 194 O
MADOCA-PPP L6E 204 O
QZS03 (SVN=003, Block type=Ⅱ-G)
PNT L1C/A, L1C, L2C, L5 199 O
SLAS L1S 189 O
PTV L5S 189 O
PTV L1Sb 137(*1) O
CLAS L6D 199 O
MADOCA-PPP L6E 209 O
Q-ANPI Sr/Sf - O
QZS04 (SVN=004, Block type=Ⅱ-Q)
PNT L1C/A, L1C, L2C, L5 195 O
SLAS L1S 185 O
PTV L5S 185 O
CLAS L6D 195 O
MADOCA-PPP L6E 205 O
QZS1R (SVN=005, Block type=ⅡA-Q)
PNT L1C, L2C, L5 196 O
PNT L1C/B 203 O
SLAS L1S 186 O
PTV L5S 186 O
CLAS L6D 196 O
MADOCA-PPP L6E 206 O
QZS06 (SVN=007, Block type=Ⅲ-G)
PNT L1C, L5 200 O
PNT L1C/B 205 O
PTV L5S 205 O
PTV L1Sb 129(*1) O
MADOCA-PPP L6D 200 O
MADOCA-PPP L6E 210 O

*: The L1C/A and L1C/B signals are exclusively transmitted.​

*1: L1Sb operation status in this table is not described the signal contents availability. MLIT(Ministry of Land, Infrastructure, Transport and Tourism) produces the augmentation signal contents. In the case used for flight operation, User should refer to NOTAM or inquire at MLIT for information about SBAS signal contents availability.

All NAQUs including outage of service, reports of anomaly, forecast of events, etc. can be confirmed on NAQU information.

  • Check NAQU information
  • Future operational events can be confirmed here.

    • ※The information of Future operational events are updated on plans until three months ahead at the end of every month, basically.

    Current effective NAQUs that indicate the notice of outage of service, forecast of events, etc. are displayed below.

    INFORMATION NAQUs

    NUMBER NAQU DETAIL
    2023134 NOTICE ADVISORY TO QZSS USERS (NAQU) 2023134 NAQU TYPE: ALL_GENERAL
    *** GENERAL MESSAGE TO ALL QZSS USERS ***
    The operation of QZS-1(SVN001) was completely terminated on September 15, 2023 after re-orbiting.
    *** GENERAL MESSAGE TO ALL QZSS USERS ***

    POC:- QZSS Services, HTTPS://QZSS.GO.JP/

    EFFECTIVE PNT NAQUs

    NUMBER NAQU DETAIL
    2025575 NOTICE ADVISORY TO QZSS USERS (NAQU) 2025575
    SUBJ: SVN003 (PRN199) FORECAST OUTAGE JDAY 359/0459 - JDAY 363/0459
    1. NAQU TYPE: PNT_FCSTDV
    NAQU NUMBER: 2025575
    NAQU DTG: 160657Z DEC 2025
    REFERENCE NAQU: N/A
    REF NAQU DTG: N/A
    SVN: 003
    PRN: 199
    START JDAY: 359
    START TIME ZULU: 0459
    START CALENDAR DATE: 25 DEC 2025
    STOP JDAY: 363
    STOP TIME ZULU: 0459
    STOP CALENDAR DATE: 29 DEC 2025

    2. CONDITION: QZSS SATELLITE SVN003 (PRN199) WILL BE UNUSABLE ON JDAY 359
    (25 DEC 2025) BEGINNING 0459 ZULU UNTIL JDAY 363 (29 DEC 2025)
    ENDING 0459 ZULU.

    3. POC: - QZSS Services, HTTPS://QZSS.GO.JP/
    2025573 NOTICE ADVISORY TO QZSS USERS (NAQU) 2025573
    SUBJ: SVN004 (PRN195) FORECAST OUTAGE JDAY 354/0759 - JDAY 357/0759
    1. NAQU TYPE: PNT_FCSTDV
    NAQU NUMBER: 2025573
    NAQU DTG: 090949Z DEC 2025
    REFERENCE NAQU: N/A
    REF NAQU DTG: N/A
    SVN: 004
    PRN: 195
    START JDAY: 354
    START TIME ZULU: 0759
    START CALENDAR DATE: 20 DEC 2025
    STOP JDAY: 357
    STOP TIME ZULU: 0759
    STOP CALENDAR DATE: 23 DEC 2025

    2. CONDITION: QZSS SATELLITE SVN004 (PRN195) WILL BE UNUSABLE ON JDAY 354
    (20 DEC 2025) BEGINNING 0759 ZULU UNTIL JDAY 357 (23 DEC 2025)
    ENDING 0759 ZULU.

    3. POC: - QZSS Services, HTTPS://QZSS.GO.JP/