‰  NOW 15 WPM  ‰  TEXT IS FROM JUNE 2015 QST  PAGE 79  ‰

THEREFORE, WHERE THE BAND OPENING GOES.  WHILE 10 IS SUFFERING FROM THIS
LACK OF SOLAR STIMULATION AS MUCH AS 15, 17, AND 12 METERS ARE, 10S VHF
SIDE PRESENTS OPERATORS WITH A NUMBER OF LONG DISTANCE PROPAGATION MODES
THAT ARE NOT AVAILABLE ON THE OTHER HF BANDS.  THE MOST NOTABLE OF THESE
INTERESTING PROPAGATION MODES IS SPORADIC E ES.  NORMALLY, THE E LAYER OF
THE IONOSPHERE IS ONLY USEFUL FOR PROPAGATING SIGNALS BELOW 20 MHZ.
SPORADIC E PROPAGATION OCCURS WHEN A CLOUD OF UNUSUALLY DENSE IONIZATION
‰  END OF 15 WPM TEXT  ‚