http://magma.ua4vjlx72wv5crhkificaeysp62hizhazipfshsdvs6jxqvhtkpllcad.onion/guide/data-sources.html
Censored Planet measures
network interference on the TCP/IP, DNS, and HTTP(S) protocols, using remote
measurement techniques Augur , Satellite , and Hyperquack respectively. Every week, Censored Planet collects reachability data about 2000 popular and
sensitive websites from more than 95,000 vantage points around the world.