PS-QZSS, IS-QZSS and Service Performance Evaluation

Jul.02,2025

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-Draft (Jun. 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>
(**) 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.
(***) 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