URASP Codes

Single-frequency measurements of solar radio flux and events, with location of events if also measured at that frequency.

Example:

Definition of symbols:

  • URASP comes from RAdio SPectral event

  • I I I I I = station indicator

  • Y = last digit of year
  • MM = month of year, 01 = January, 02 = February, etc
  • . DD = UT day of month

  • FF = lowest frequency of equipment (first two significant figures)
  • GG = highest frequency of equipment (first two significant figures)
  • H = frequency multiplication indicator, where
    • 0 = indicates FF is to be multiplied by 1, GG by 1 to obtain frequencies in MHz
    • 1 = indicates FF is to be multiplied by 1, GG by 10 to obtain frequencies in MHz.
    • 2 = indicates FF is to be multiplied by 10, GG by 10 to obtain frequencies in MHz.
    • 3 = indicates FF is to be multiplied by 1, GG by 100 to obtain frequencies in MHz
    • 4 = indicates FF is to be multiplied by 10, GG by 100 to obtain frequencies in MHz
    • 5 = indicates FF is to be multiplied by 100, GG by 100 to obtain frequencies in MHz (If the report is based on real-time output which covers less than the full frequency range of the equipment, then give frequency range of real-time output.)

  • a a = UT hour nearest beginning of observation period
  • b b = UT hour nearest end of observation period
  • c = number of significant events reported

  • f f = lowest frequency of significant event
  • g g = highest frequency of significant event
  • h = frequency multiplication indicator for f f and g g, coded as for H above

  • d = type of spectral activity, where
    • 1 = type I storm = noise storm
    • 2 = type II burst = slow-drift burst
    • 3 = type III burst = fast-drift burst
    • 4 = type IV = prolonged broad-band continuum, often preceded, at meter wavelengths, by a type II burst
    • 5 = type V burst
    • 6 = type III storm or dekametric continuum
    • 7 = intermittent groups of type III bursts
    • 8 = microwave burst of short (minutes) duration, usually of impulsive start
    • 9 = continuum (except type IV and dekametric)
    • / = unclassified activity
  • HHmm = UT hour and minute of start of event (if in progress at beginning of observation period use / / / /)

  • e = importance of event, if record timing is accurate to within 2 minutes:
    • 1 = importance 1
    • 2 = importance 2
    • 3 = importance 3
    • 7 = importance 1+
    • 8 = importance 2+
    • 9 = importance 3+
    • Otherwise, if record timing is not accurate to within 2 minutes:
    • 4 = importance 1
    • 5 = importance 2
    • 6 = importance 3
  • HHmm = UT hour and minute of end of event (if event is still in progress at end of observation period, use / / / /).

Note: / is to be used for data not available.