コンテンツです

Centimeter Level Augmentation Service (CLAS)

Outline

This is the download site for QZSS archives about Centimeter Level Augmentation Service (CLAS).

Broadcasted L6 messages (Centimeter-Level Augmentation Service Messages) generated by CLAS are provided according to L6 message format, refer to section 4.1. of IS-QZSS-L6-004.

Note:

Because of maintenance period of ground systems, etc., some data may be missing.

Data Definition

Refer to section 4.1. of IS-QZSS-L6-004.

Centimeter-Level augmentation information is included in the data part of L6 message.

The data part includes multiple RTCM STANDARD 10403.2 compatible messages, called "Compact SSR Messages"*.

* RTCM SC-104 QZSS Working Group, "Specification of Compact SSR Messages for Satellite Based Augmentation Service,"

RTCM Paper, Specification of Compact SSR Messages for Satellite Based Augmentation Service, Version 0.8, 17-SEP-2019.

Public Archive Data of the augmentation information based on the updated coordinate system, ITRF2014 (IGb14), compliant with IS-QZSS-L6-004 (July 14, 2021) was started by Quasi-Zenith Satellite System Services Inc. (QSS) from 05:00 UT on August 2, 2021, replacing the data compliant with the IGS05 coordinate system that had been distributed earlier.


How to use

STEP1 : Choose Data Period.

STEP2 : Choose needed data from Data List.

STEP3 : Download!


Data Select

 
L6 Signal


Data Period

/
/
 
/
/
 

 


Data List

L6 Signal
Results from 2025-07-11 to 2025-07-11
page 1 / 1
ALL Data Type Reference Time Size(byte) FileName
1 L6 Signal
2025/07/11 19:00
900000
2025192T.l6
2 L6 Signal
2025/07/11 18:00
900000
2025192S.l6
3 L6 Signal
2025/07/11 17:00
900000
2025192R.l6
4 L6 Signal
2025/07/11 16:00
900000
2025192Q.l6
5 L6 Signal
2025/07/11 15:00
900000
2025192P.l6
6 L6 Signal
2025/07/11 14:00
900000
2025192O.l6
7 L6 Signal
2025/07/11 13:00
900000
2025192N.l6
8 L6 Signal
2025/07/11 12:00
900000
2025192M.l6
9 L6 Signal
2025/07/11 11:00
900000
2025192L.l6
10 L6 Signal
2025/07/11 10:00
900000
2025192K.l6
11 L6 Signal
2025/07/11 09:00
900000
2025192J.l6
12 L6 Signal
2025/07/11 08:00
900000
2025192I.l6
13 L6 Signal
2025/07/11 07:00
900000
2025192H.l6
14 L6 Signal
2025/07/11 06:00
900000
2025192G.l6
15 L6 Signal
2025/07/11 05:00
900000
2025192F.l6
16 L6 Signal
2025/07/11 04:00
900000
2025192E.l6
17 L6 Signal
2025/07/11 03:00
900000
2025192D.l6
18 L6 Signal
2025/07/11 02:00
900000
2025192C.l6
19 L6 Signal
2025/07/11 01:00
900000
2025192B.l6
20 L6 Signal
2025/07/11 00:00
900000
2025192A.l6