Without global connectivity providing the opportunity to cross-check a sampling of independent nodes' ideas of the latest blocks, this sounds like a loser's gam

Without global connectivity providing the opportunity to cross-check a sampling of independent nodes' ideas of the latest blocks, this sounds like a loser's game. Either you need a million independent satellites and HAM stations in range, or you are just begging to be spoon-fed malicious and/or outdated blockchain data. No way any mining operation can be competitive in such an environment.