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Data Access

KVN (Korean VLBI Network) observation data is exclusively available to the Principal Investigator (PI) for 18 months from the date of observation. After this period, anyone can access and download data.

The data observed by the KVN is stored on the Minio server, and there are two main methods for downloading it: using the MinIO Client (mc) and wget. Using the mc program provided by Minio is particularly convenient for daa access and management.

Using MinIO Client (mc)

MinIO Client (mc) is a command-line tool that allows for easy management and transfer of files on S3-compatible storage, such as a MINIO server. You can quickly download files stored on the Minio server by installing the mc program on your personal computer. Download it from the following https://min.io/docs/minio/linux/reference/minio-mc.html. After installing mc, you'll need the access address, ACCESS_KEY, and SECRET_KEY to configure the connection.

Configure MinIO mc as an anonymous user by leaving the access key and secret key blank. This way, you're connecting without any specific user identity.

To set an alias: mc alias set openkvn "http://210.110.233.67:9003" "" ""
To search: mc ls openkvn/obscode
To download: mc cp -r openkvn/obscode/ ./obscode

Once configured, anonymous users can access any publicly accessible data in that bucket, such as files or folders set for public download or viewing. If you run the example above and see a list, it confirms that the configuration is correct. For more details on using mc, refer to the official documentation at: https://min.io/docs/minio/linux/reference/minio-mc.html?ref=docs

Using wget

wget is a simple command-line utility for downloading files via URL. If the URL to the data is known, it can be downloaded using this tool.

wget http://your-minio-server/bucket/path/to/data -O /local/path