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CLAS Test Library


“CLAS Test Library”, an open source software tool to provide useful information for Centimeter-Level Augmentation Service (CLAS), is available from [Technical Information / Service Support Information/Centimeter Level Augmentation Service].

It is based on RTKLIB, an open source program package for standard and precise positioning with GNSS. It includes the tool shown as bellow and sample data-set. It can be effectively used to implement the user-side algorithm to support CLAS.

※The CLAS test library is temporary unavailable because some coding issues were found.The corrected version will be available soon.

  1. The converter from State Space Representation (SSR) to Observation Space Representation (OSR).
  2. The decoder of L6 data messages in ASCII format
  3. The converter from L6 data messages to RTCM 3 messages
  4. CLAS Test Library Manual

For technical questions and comments about the CLAS Test Library, please send it to the following e-mail address.

E-mail address: IS.PS-QZSS-L6(at)
(Please replace (at) with @ when sending mail.)