Satellite broadcasting has been proposed as a method to improve the privacy and resilience of the Bitcoin network. Here are some key points about using satellites for Bitcoin broadcasting:

- Blockstream has launched satellites to broadcast the Bitcoin blockchain globally, allowing users to receive blockchain data via satellite without an internet connection.[2] This provides an alternative to the traditional peer-to-peer network for receiving blockchain data.

- Satellite broadcasting can enhance privacy by allowing users to receive Bitcoin data without connecting to the internet, making it harder to trace their activity.[3] Users only need a satellite dish to receive the broadcast.

- Projects like BitSats, SpaceChain, and ChainSat have explored using satellites as nodes to propagate blocks and transactions in a space-terrestrial Bitcoin network.[2] This could improve the resilience and decentralization of the network.

- Satellites' wide coverage and multicast capabilities could help improve the scalability of blockchain networks by efficiently disseminating data to many nodes simultaneously.[2]

- The fixed propagation delay of satellite links is more predictable than internet routing, which could benefit blockchain consensus protocols.[2][1]

So in summary, satellite broadcasting has been proposed as a privacy-enhancing measure for Bitcoin users and as a way to build more resilient, scalable blockchain networks by leveraging satellites' unique capabilities.[2][3]