Ionogram

• Ionogram viewer (after Nov. 2001)

• Ionogram viewer

• Ionogram movie in KML
  
  
• Direct access to ionogram database
  
  

 Ionospheric parameters from Ionogram

• Manually scaled parameters (1-hour interval, in TEXT format)
  
  * The data in 15-min or less interval are also available for regular observations at Kokubunji and special observations. Please contact us if you are interested in these data.
  
  
• Automatically scaled parameters (15-min interval, in TEXT format)
  
  
• Manually scaled parameters (1-hour interval, in HTML format)
  
  
• Manually scaled parameters (In published booklet format/GIF file)
  
  
• Quick-Look of Ionospheric Storms (Japanese Only)
  
  

 Summary ionogram

• Summary plot viewer (after Nov. 2001)
  
  
• Summary plot viewer (15-minute interval)
  For each station   For each layer

  Plot of Ionospheric parameters

• f-PLOT (Manually scaled)
  
  
• h'/Es-PLOT (Manually scaled)
  
  
• Monthly Median Values of foF2 (Manually scaled)
  
  
• Monthly Median Values of foEs (Manually scaled)

 Plot of Ionospheric parameters for long term

• h'F (Manually scaled)
  
  
• foF2 (Manually scaled)
  
  
• Summary ionogram

 Photos

• Ionosonde Stations in Japan
  
  
• IONOSONDE Transmitter/Receiver/Controller