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All Pools >> General >> G3A




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G3A01 : What is the significance of the sunspot number with regard to HF propagation?

  -  Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
  -  Lower sunspot numbers generally indicate greater probability of sporadic E propagation
  -  A zero sunspot number indicate radio propagation is not possible on any band
  -  All of these choices are correct.

Correct Answer: Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies