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Observations needed to provide basic indices for ionospheric propagation

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You are here Home > ITU Publications > Radiocommunication (ITU-R) > ITU-R Opinions > Observations needed to provide basic indices for ionospheric propagation

Opinion 23
Main
Number
 Title Status
Op.23-7(2016)
  		Observations needed to provide basic indices for ionospheric propagation  
 		In force (Main)
 
 
Previous versions
Number
 Title Status
Op.23-6 (1999)
  		Observations needed to provide basic indices for ionospheric propagation  
 		Superseded

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