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Start of QZS-4 Trial Service
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Start of Sub-meter Level Augmentation Service (SLAS) Trial Service using QZS-2
Start of QZS-3 Trial Service
The third Quasi-Zenith Satellite (QZS-3) was launched on August 19, 2017.
After launch, the satellite test on orbit and the authorization work to confirm performance and compatibility with ground systems have been made. The authorization work has been completed, and trial services started on December 18, 2017 for the following services.
- Satellite Positioning, Navigation and Timing Service (PNT)
- Sub-meter Level Augmentation Service (SLAS)
- Centi-meter Level Augmentation Service (CLAS)
The trial services will offer services with the same performance as the operation starting in FY2018.The details are shown on this website's User Interface Specifications page.
Centi-meter Level Augmentation information trial service starts to broadcast augmentation information for the following GNSS signals shown on this website's Performance Standard (PS-QZSS), 6.1 clause.
QZSS: L1C/A, L2C
GPS: L1C/A, L2P
About Centi-meter Level Augmentation information using other signals, it is planned to be broadcast after the confirmation is completed about CLAS performance depending on GNSS constellation status and the correspondence to GNSS of GEONET. Notice will be posted on this website about the start date of that service and other issues.
Information about provided services
Information about provided services is available on this website’s Operational status / NAQU information page.
NAQU information is provided via Twitter. To view this information, please follow @QZSS_Status on Twitter. (Twitter user top page: https://twitter.com/QZSS_Status)
![](khp0mf000000125i-img/khp0mf0000001286.jpg)
Borrowing receivers for application demonstration
While the trial services are available, application demonstrations can be conducted freely using QZS. Receivers for application demonstration can be borrowed at no charge. If you would like to borrow a receiver, please read the information on the Application Demonstration page and then apply.
Receivers cannot be directly loaned to people outside of Japan. However, a corporation in Japan may borrow a receiver and use it in other countries at its own cost and responsibility.
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Sep.03,2024
Update the User Interface Specification (IS-QZSS-MDC) for MADOCA-PPP
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Jul.12,2024
Update the User Interface Specification (IS-QZSS-PNT-006) for the PNT
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Jul.01,2024
Start of the Internet distribution of MADOCA-PPP and release of MADOCALIB v1.2
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Jun.19,2024
Internet distribution of MADOCA-PPP
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Jun.03,2024
Update the User Interface Specification (IS-QZSS-DCR) for the DC Report Service
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Apr.01,2024
Operational service of MADOCA-PPP has now started
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Apr.01,2024
Start of Satellite Report for Disaster and Crisis Management (Extended Information) and adoption of Common Alert Message Format
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Apr.01,2024
Start of signal authentication service
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Feb.22,2024
The Test Transmission of signal authentication data (notice of close)
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Jan.10,2024
The Test Transmission of signal authentication data (notice of GNSS signal authentication resumption and QZSS signal authentication start)
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Dec.28,2023
Update the User Interface Specification (IS-QZSS-TV) for the PTV
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Dec.21,2023
The change of transmission pattern for navigation messages in PNT services
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Dec.15,2023
The Test Transmission of signal authentication data (notice of suspension)
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Dec.18,2023
Schedule for changes in the transmission patterns of navigation messages for PNT services
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Dec.07,2023
Upcoming Schedule for the Launch of Satellite Report for Disaster and Crisis Management (Extended Information)
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Nov.30,2023
Update the User Interface Specification (IS-QZSS-MDC) for MADOCA-PPP
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Nov.10,2023
Start of the application of the interface specification for PNT service of the 5th edition (IS-QZSS-PNT-005)
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Nov.09,2023
Implementation of the application work for the interface specification for PNT service of the 5th edition (IS-QZSS-PNT-005) (added on November 9)
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Oct.31,2023
Update the User Interface Specification (IS-QZSS-DCR) for the DC Report Service
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Oct.25,2023
Update the User Interface Specification (IS-QZSS-L1S) for the SLAS
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Sep.15,2023
Suspension of QZS-1 all operations
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Sep.01,2023
NAQU notification for MADOCA-PPP
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Aug.23,2023
Application of the interface specification for PNT service of the 5th edition (IS-QZSS-PNT-005)
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Jul.31,2023
The Test Transmission of signal authentication data has now started
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Jul.07,2023
The Test Transmission of signal authentication data
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Feb.17,2023
Update the User Interface Specification (IS-QZSS-L1S) for the SLAS
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Jan.24,2023
Release of the user interface specification (draft version) for signal authentication service
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Oct.25,2022
Update the interface specification of PNT service for 7-Satellites Constellation in advance
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Sep.30,2022
Trial service of MADOCA-PPP has now started
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Sep.22,2022
The Beginning of Trial Service of MADOCA-PPP (Switchover dates and related user interface specifications)
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Aug.01,2022
The Test Transmission of MADOCA-PPP
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Apr.01,2022
The GNSS Integrated Data Sharing System (MIRAI)
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Mar.25,2022
Suspension of QZS-1 signal transmission
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Mar.24,2022
Update the Performance Standard(PS-QZSS) for the start of QZS-1R services
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Mar.24,2022
Start of QZS-1R Services
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Mar.22,2022
Start of QZS-1R Services and Suspension of QZS-1 signal transmission
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Mar.18,2022
Update the Performance Standard (PS-QZSS) for the start of QZS-1R services
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Mar.14,2022
Start of QZS-1R Services and Suspension of QZS-1 signal transmission (Advance Notice)
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Feb.28,2022
Release of Specifications for MADOCA-PPP
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Feb.28,2022
Release of Service Performance Evaluation
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Jan.31,2022
Start of QZS-1R test signals transmission
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Jan.26,2022
Update the User Interface Specification (IS-QZSS-DCR) for the DC Report Service
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Nov.29,2021
Release of Service Performance Evaluation
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Oct.26,2021
Launch Result of the H-IIA Launch Vehicle No. 44 which carries aboard the QZS-1R
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Jul.14,2021
Update of the compliant coordinate system and User Interface Specification for CLAS
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Apr.23,2021
Reassignment of QZSS L5S PRN number completed and application of the User Interface Specification (IS-QZSS-TV-003) for the PTV started
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Apr.14,2021
Reassignment of QZSS L5S PRN number and application of the User Interface Specification (IS-QZSS-TV-003) for the PTV
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Mar.09,2021
Trial transmission of the navigation message authentication
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Feb.15,2021
Complete the update of the PNT reference frame for alignment with ITRF2014
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Feb.01,2021
Update the User Interface Specification (IS-QZSS-PNT-004) for the PNT
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Feb.01,2021
Update the PNT reference frame for alignment with ITRF2014
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Jan.27,2021
Release of Service Performance Evaluation
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Nov.17,2020
Launch of the upgraded CLAS Service corresponding to 17 augmented satellites
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Jun.19,2020
Start of Trial transmission of the Augmentation Information corresponding to IS-QZSS-L6-002 in Centi-meter Level Augmentation Service (CLAS)
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Jul.29,2019
Web URL Change notice for "Operational Information/Archive Data" due to shift from "http" to "https"(SSL)
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Nov.01,2018
Start of QZSS Services
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Sep.07,2018
Re-start of QZS test operation
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Jun.05,2018
Anomaly of a QZS in Orbit
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Apr.03,2018
Setting update of Centi-meter Level Augmentation Service (CLAS) Trial Service
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Mar.02,2018
Starting Date of QZSS Services
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Jan.17,2018
Commencement of QZS-3, QZS-4 Satellite Report for Disaster and Crisis Management (DC Report) trial service
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Jan.12,2018
Start of QZS-4 Trial Service
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Nov.15,2017
Start of Sub-meter Level Augmentation Service (SLAS) Trial Service using QZS-2
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Sep.27,2017
Commencement of Satellite Report for Disaster and Crisis Management (DC Report) trial service
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Sep.27,2017
Start of Centi-meter Level Augmentation Service (CLAS) Trial Services using QZS-1
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Sep.22,2017
Change of Centi-meter Level Augmentation Service (CLAS) Trial Service
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Sep.15,2017
Start of QZS-2 Trial Service
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Sep.14,2017
Restart of Centi-meter Level Augmentation Service Trial Services
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Sep.04,2017
Distribution stop of Centi-meter Level Augmentation Service Trial Services
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Mar.29,2017
Start of Trial Services
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Feb.22,2017
QZS-1 Control Will be Transferred to the Cabinet Office, Followed by an Adjustment Period Before the Trial Service Start