PS-QZSS (Performance Standard), IS-QZSS (Interface Specification) and Service Performance Evaluation

Jun.13,2025

	Performance Standard (PDF)	Interface Specification (PDF)	Service Performance Evaluation
Satellite Positioning, Navigation and Timing Service	PS-QZSS-003 (Mar. 17, 2022) PS-QZSS-004 (Oct. 11, 2024) (*)	IS-QZSS-PNT-006 (Jul. 11, 2024)	Satellite Positioning, Navigation and Timing Service
Sub-meter Level Augmentation Service (SLAS)		IS-QZSS-L1S-008 (Apr. 25, 2025)	Sub-meter Level Augmentation Service (SLAS)
Centimeter Level Augmentation Service (CLAS)		IS-QZSS-L6-005 (Sep. 21, 2021) IS-QZSS-L6-007-Draft (Jun. 2025) (**)	Centimeter Level Augmentation Service (CLAS)
MADOCA-PPP		IS-QZSS-MDC-003 (Aug. 2024) IS-QZSS-MDC-004-Draft (May 2025) (***)	MADOCA-PPP
Satellite Report for Disaster and Crisis Management (DC Report)		IS-QZSS-DCR-014 (Apr. 25, 2025)	-
		IS-QZSS-DCX-003 (Mar. 2025)	-
Positioning Technology Verification Service		IS-QZSS-TV-004 (Sep. 27, 2023)	-
Signal Authentication Service	-	IS-QZSS-SAS-001 (May, 27. 2024)	-

(*) The following sections of PS-QZSS-004 will be applied after the seven-satellite constellation service is started. Until then, please refer to PS-QZSS-003. We will announce the start date of the seven-satellite constellation service on our website.
<The sections: 3.2, 4, 5, 6, 7, 9>
(**) IS-QZSS-L6-007-Draft is a draft version for the start of the upgraded CLAS service to increase the number of augmented satellites. We will announce the release date of the final version of IS-QZSS-L6-007 and the start date of upgraded CLAS service on our website. Until then, please refer to IS-QZSS-L6-005.
(***) IS-QZSS-MDC-004-Draft is a draft version for the start of message distribution with improved number of augmented signals and satellites. We will announce the release date of the final version of IS-QZSS-MDC-004 and the start date of improved message distribution on our website. Until then, please refer to IS-QZSS-MDC-003.
IS-QZSS-MDC-003 and IS-QZSS-MDC-004-Draft include includes the specification of ionospheric correction message, which is scheduled to be transmitted from QZS-6 and 7. Ionospheric correction transmission will start as the operational service after the experimental service. We will inform you of the specific schedule on our website. Current coverage areas of MADOCA-PPP ionospheric correction data in Internet distribution is shown in <Coverage area of MADOCA-PPP ionospheric correction data>.

Reference material

	Service Level Information	Content
MADOCA-PPP Ionospheric Correction for Experiment	SLI-MDC-ION (Draft, February 2022)	As a demonstration, the wide-range ionospheric correction for the Asia and Oceania regions is transmitted by the L6D messeges to shorten the TTFF (Timi To First Fix) of MADOCA-PPP. This document describes the reference information of this demonstration. Reference performance evaluation results: SPR-MDC-ION-2024-1 Service Performance Report