[MilCom] UHF Space shuttle frequencies?

[Stavro Giovani]

These are listed. But are they any good and if so what can we expect to 
hear on them if anything?

UHF Frequencies
  259.700 Air-to-Ground voice downlink (AM) (Primary)
  279.000 EVA voice orbiter only, no ground link (AM)
  296.800 Air-to-Ground voice downlink (AM) (Secondary)











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