Overview of Data Analysis Network System (DANS). Telemetry data downlinked from Hisaki are received at the ground station network and stored in the data distribution/storage device. The pipeline system processes the stored telemetry data transferred via the telemetry archive SIRIUS. The processed data are archived as high-level science data products in the Data Archive and Transmission System (DARTS), and high-level data products are published to the internet from DARTS. Metadata of the high-level data are archived in European metadatabases, VESPA and APIS, and are published to the internet.