Centimeter Level Augmentation Service (CLAS)
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-L6-001.
Because of maintenance period of ground systems, etc., some data may be missing.
Refer to section 4.1. of IS-QZSS-L6-001.
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 008-2016-SC104-922, 2015.
How to use
STEP1 : Choose Data Period.
STEP2 : Choose needed data from Data List.
STEP3 : Download!
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