This is the home page of Solar Radio Observation at NICT. To get Japanese version, click here.

HiRAS-1(25MHz-50MHz) has not tracked the Sun.

Data for HiRAS-2(50MHz-500MHz) has been very noisy due to deterioration of radiowave environment around observatory.

Latest HiRAS Data (Yesterday's Solar Radio Observations)

• HiRAS(18h-03hUT) Spectrogram(25-2500MHz)
• HiRAS(03h-12hUT) Spectrogram(25-2500MHz)
• Fixed Frequency Measurements(2.8GHz)

  Realtime HiRAS Data 

Today	Yesterday

Recent Typical HiRAS Observation

• July 25, 1997 event 

• Past Events

HiRAS Data Archives (GIF files)

• 1996(August and later)
• 1997
• 1998
• 1999
• 2000
• 2001
• 2002
• 2003
• 2004
• 2005
• 2006
• 2007
• 2008
• 2009
• 2010
• 2011
• 2012
• 2013

HiRAS Spectral Observation Summary Reports (Text files)

• Available period : October,1994 - December,2011

HiRAS Single frequency Observations Summary Reports (PDF files)

• Available period : July,2000 - June,2012

HiRAS (Hiraiso Radio Spectrograph) System

• System Description
• System Block Diagram
• Antennas
• System Characteristics
• System History

Typical HiRAS Observations

• Classification of solar radio bursts(a bit modified!)
• Type I bursts
• Type II and III bursts
• Type II and IV bursts
• Type III and IV bursts
• Type V bursts (now preparing)
• Feb.20,1994 event 

For any question or comments, please contact here.

Updated on August 16, 2012