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Routine ionospheric sounding

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You are here Home > ITU Publications > Radiocommunication (ITU-R) > ITU-R Opinions > Routine ionospheric sounding

Opinion 22
Main
Number
 Title Status
Op.22-7 (2007)
  		Routine ionospheric sounding  
 		In force (Main)
 
 
Previous versions
Number
 Title Status
Op.22-6 (1999)
  		Routine ionospheric sounding  
 		Superseded

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