Hello,
OONI's Leonid published a post today which explains how to mine OONI data via Amazon S3 buckets and other sources: https://ooni.torproject.org/post/mining-ooni-data/
As you may already know, OONI data is publicly available via OONI Explorer and the OONI API (https://ooni.torproject.org/data/), but these resources currently present various limitations.
If you're interested in downloading the full batch of raw OONI data faster, you can do so via the ooni-data Amazon S3 bucket. The post provides instructions and examples of extracting OONI data from Amazon S3 buckets.
Instead of downloading all OONI data, you may find it useful to work with a metadata database to identify the subset of measurements that you want to download for further processing. In this case, you can get a PostgreSQL database dump and run SQL queries on it.
Learn more through the post. Happy mining!