Performance Standard, Interface Specification and Service Performance Evaluation

Aug.05,2025

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

	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 (Jul. 31, 2025) (**)	Centimeter Level Augmentation Service (CLAS)
MADOCA-PPP		IS-QZSS-MDC-004 (Jun. 25, 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>
(**) The following sections and items of IS-QZSS-L6-007 include descriptions for the upgraded CLAS service to increase the number of augmented satellites.
Please refer to IS-QZSS-L6-005 for the period prior to the start of the upgraded CLAS service, except for the validation period of this service. The validation period and start date of this service will be announced on our website.
<The sections and items: 4.1.1.2, 4.1.2.1 (3), 4.1.2.2.2 (6), 5.5.7.2>
(***) Ionospheric correction transmission will be put into the operational service after the experimental service. The schedule will be announced on our website. Coverage areas of MADOCA-PPP ionospheric correction data 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 SPR-MDC-ION-2024-2 Service Performance Report