Launch of the upgraded CLAS Service corresponding to 17 augmented satellites
Centi-meter Level Augmentation Service (CLAS) has been broadcasting trial signal compliant with IS-QZSS-L6-003 (*1) using the L6D signal of the Quasi-Zenith Satellite-3, which increases the number of augmented satellites to a maximum of 17 for more stable positioning accuracy (*2).
From 15:00 on Nov. 30 (JST), the official broadcast of the augmentation information compliant with IS-QZSS-L6-003 from all the Quasi-Zenith Satellites (QZS-1, 2, 3, and 4) will be launched. Before the launch, the CLAS service from all the QZSS satellites will be suspended from 12:00 to 15:00 on Nov. 30 due to the specification update of the augmentation information from all the QZSS satellites (*3). We apologize for any inconvenience this may cause and thank you for your understanding.
QZS-1 | QZS-2 | QZS-4 | QZS-3 | |
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Until 12:00 on Nov. 30 (JST) | The signal complies with IS-QZSS-L6-001. | Trial operation | ||
From 12:00 to 15:00 on Nov. 30 (JST) | Service interruption period. The alert flag is fixed at "1". | |||
After 15:00 on Nov. 30 (JST) | The signal complies with IS-QZSS-L6-003. |
In order to continue using CLAS after the launch of the official broadcast, it may be necessary to update the receiver's F/W to comply with IS-QZSS-L6-003. Please contact the manufacturer of the CLAS receiver for further information.
*1: Please refer to the Interface Specification (IS-QZSS-L6-003, Aug. 20, 2020) of Centi-meter Level Augmentation Service.
*2: Please refer to the "Notices" released on June 19, 2020. The title of the link is "Trial transmission of Augmentation Information for IS-QZSS-L6-002" because this announcement had been made before IS-QZSS-L6-003 was released.
*3: Details of the service interruption period will be announced by NAQU messages.
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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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Dec.19,2017
Start of QZS-3 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