Birdwatch Note Rating
2023-06-22 07:18:26 UTC - HELPFUL
Rated by Participant: CF0B94125CA1F114A4E223479CE86A42C6E9B0CF6BC84768E6E38462D5B55628
Participant Details
Original Note:
Starlink operates in the 10.7 to 12.7 GHz band. https://radionavlab.ae.utexas.edu/wp-content/uploads/2023/01/starlink_structure.pdf Penetration depth of 2.45GHz in water is <8cm and falls off with increasing frequency. https://cober.com/wp-content/uploads/2018/06/Microwave-Technology-Cober-website-v08-23-17.pdf Therefore, Starlink cannot be used to communicate with an underwater submarine, and it was not "unknown" whether the sub itself used it.
All Note Details