コンテンツです

NAQU Message

NAQU is an abbreviation of "NOTICE ADVISORY TO QZSS USERS".

It is the QZSS version of the NANU(NOTICE ADVISORY TO NAVSTAR USERS) which the US Coast Guard Navigation Center gives out for information on GPS.

NAQUs are announced from the MCS to the users to give information of the QZSS status. They include: outage of service, reports of anomaly, forecast of events, etc.

Users will get NAQU messages to read in this web page or to follow the Twitter account: "@QZSS_Status".

  • Details of NAQU format
  • NAQU notification times typically vary by NAQU group. Nominal NAQU notification times for the four NAQU groups are summarized in Table
    NAQU Group Nominal Notification Times
    Forecast Outages 48 hrs prior to outage start
    Unscheduled Outages Less than 1 hr after outage start
    Other No Nominal - Timing determined on a case-by-case basis
    Resumed service Less than 1 hr after resumed service*
    *There are a few exceptional cases due to failure.

    The cell color of the list means below.

    Forecast Outages

    Unscheduled Outages

    Other

    Resumed service

    QZSS is operated in a 4-satellite constellation at present.

    The operational status of each satellite can be confirmed on Constellation status.

    Current effective NAQUs that indicate the notice of outage of service, forecast of events, etc. can be confirmed too.

  • Check Constellation status

  • Select data

    NAQU Message 2018

    DATE PNT SLAS DC Report L1Sb PTV CLAS PRS Q-ANPI
    L1C/A L1C L2C L5 L1S L1Sb L5S L6 L6R Sr/Sf
    2018/12/08
    2018/11/30
    2018/11/28
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    2018/11/08
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    2018/10/26
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